BECKWITH ELECTRIC M-3425 Instruction Book Download | Manualshive

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Application – 2

2–23

46 Negative Sequence Overcurrent

The Negative Sequence Overcurrent function
provides protection against possible rotor
overheating and damage due to unbalanced faults
or other system conditions which can cause
unbalanced three phase currents in the generator.
Ranges and increments are presented in Table 2-8.

This function has a definite time element and an
inverse time element. The definite time pickup value
and definite operating time are normally associated
with an alarm function. The inverse time element is
usually associated with a trip function and has a
pickup and an operating time defined by an (I

2

)

2

t =

K, where K is the Time Dial Setting and I

2

is the per

unit negative sequence current.

The minimum delay for the inverse time function is
factory set at 12 cycles to avoid nuisance tripping.
A maximum time to trip can be set to reduce the
operating times for modest imbalances. An important
feature that helps protect the generator from damage
due to recurring imbalances is a linear reset
characteristic. When I

2

decreases below the pickup

value, the trip timer takes four minutes to reset from

its 100% trip level. Figure 2-12, Negative Sequence
Overcurrent Inverse Time Curves, illustrates the
inverse time characteristic of the negative sequence
overcurrent function.

Operating times are lower than that is shown in
Figure 2-12 when measured current values are
greater than 15 A (3 A for 1 A rated circuit).

The first task of setting this function is to determine
the capabilities of the associated machine. As
established by ANSI standards, the machine limits
are expressed as (I

2

)

2

t = K. The value of K is

established by the machine design and is generally
provided on test sheets of the machine. The relay
can accommodate any generator size because of
the wide range of K settings from 1 to 95. Typical
values can be found in ANSI C50.13-1977.

The negative sequence pickup range is from 3% to
100% of the Nominal Current value input during
system setup (see Section 2.1, Configuration).

This protection must

not operate for system faults

that will be cleared by system relaying. This requires
consideration of line protection, bus differential and
breaker failure backup protections.

N

O

I

T

C

N

U

F

E

G

N

A

R

T

N

I

O

P

T

E

S

T

N

E

M

E

R

C

N

I

)

6

4

(

t

n

e

r

r

u

c

r

e

v

O

e

c

n

e

u

q

e

S

e

v

i

t

a

g

e

N

e

m

i

T

e

t

i

n

i

f

e

D

p

u

k

c

i

P

%

0

0

1

o

t

3

%

1

y

a

l

e

D

e

m

i

T

s

e

l

c

y

C

0

6

1

8

o

t

1

e

l

c

y

C

1

e

m

i

T

e

s

r

e

v

n

I

p

u

k

c

i

P

%

0

0

1

o

t

3

%

1

g

n

i

t

t

e

S

l

a

i

D

e

m

i

T

I

=

K

(

2

2

)

t

5

9

o

t

1

1

m

u

m

i

x

a

M

e

t

i

n

i

f

e

D

p

i

r

T

o

t

e

m

i

T

s

e

l

c

y

C

0

0

5

,

5

6

o

t

0

0

6

e

l

c

y

C

1

e

m

i

T

m

u

m

i

n

i

M

e

ti

n

i

f

e

D

s

e

l

c

y

C

2

1

d

e

x

i

F

)

r

a

e

n

il

(

e

m

i

T

t

e

s

e

R

s

e

t

u

n

i

m

4

)

p

i

r

t

f

o

d

l

o

h

s

e

r

h

t

m

o

r

f

(

–

Table 2-8

Negative Sequence Overcurrent (46) Setpoint Ranges

«
...
58
59
60
61
62
...
»

Summary of Contents for M-3425

Page 1: ...Instruction Book M 3425 Generator Protection ...

Page 2: ...g Field Ground 64F Out of Step 78 and Split Phase Differential 50DT Expanded IPScom Communications Software provides simple and logical setting and programming Enhanced pick and choose functionality provides tailored applications at the lowest possible cost Unit shown with optional M 3925 Target Module and M 3931 HMI Human Machine Interface Module PROTECTION ...

Page 3: ...f Step protection 78 Four step Over Underfrequency 81 protec tion Two step Rate of Change of Frequency 81R Generator Phase Differential protection 87 Ground Differential 87GD protection External Function allows external devices to trip through M 3425 Generator Protection Relay Optional Protective Functions Stator Thermal protection using positive se quence inverse time overcurrent 51T Field Ground...

Page 4: ...plicable from 10 to 80 Hz 0 to 180 V 100 to 150 V Hz and a nominal voltage setting of 120 V Third Harmonic Undervoltage Neutral Pickup 1 2 0 3 to 20 0 V 0 1 V 0 15 V or 1 Time Delay 1 2 1 to 8160 Cycles 1 Cycle 1 Cycle or 1 Undervoltage Inhibit 1 2 5 to 180 V 1 V 0 5 V or 0 5 positive sequence Underpower Inhibit 1 2 0 002 to 3 000 PU 0 001 PU 0 002 or 2 RMS Undervoltage Pickup 1 2 5 to 180 V 1 V 0...

Page 5: ... Inverse Time Pickup 3 to 100 1 0 5 of 5 A 0 5 of 1 A Time Dial Setting 1 to 95 1 3 Cycles or 3 K I2 2 t Definite Maximum Time to Trip 600 to 65 500 Cycles 1 Cycle 1 Definite Minimum Time 12 Cycles fixed Reset Time Linear 4 minutes from threshold of trip Pickup is based on the generator nominal current setting Breaker Failure Pickup Phase Current 0 10 to 10 00 A 0 01 A 0 1 A or 2 0 02 to 2 00 A 0 ...

Page 6: ...ltage Pickup 40 to 130 V 1 V 0 5 V Pick up Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1 Drop out Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1 Inverse Time Neutral Overcurrent Pickup 0 25 to 12 00 A 0 01 A 0 1 A or 1 0 05 to 2 40 A 0 02 A or 1 Characteristic Curve Definite Time Inverse Very Inverse Extremely Inverse IEC Curves Time Dial 0 5 to 11 0 0 1 3 or 3 Cycles 0 05 to 1 10 IEC curves ...

Page 7: ...me Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1 Out of Step mho characteristic Circle Diameter 0 1 to 100 0 Ω 0 1 Ω 0 1 Ω or 5 0 5 to 500 0 Ω 0 5 Ω or 5 Offset 100 0 to 100 0 Ω 0 1 Ω 0 1 Ω or 5 500 0 to 500 0 Ω 0 5 Ω or 5 Impedance Angle 0 to 90 1 1 Blinder 0 1 to 50 0 Ω 0 1 Ω 0 1 Ω or 5 0 5 to 250 0 Ω 0 5 Ω or 5 Time Delay 1 to 8160 Cycles 1 Cycle 1 Cycle or 1 Trip on mho Exit Enable Disable Pole ...

Page 8: ... operates as a directional differential If 3I0 or In is extremely small less than 0 2 secondary Amps the directional element is disabled External Functions Two functions are provided for externally connected devices to trip through the relay to provide additional logic and target information Any one or more of the input contacts IN1 IN6 can be programmed to activate designated output contacts afte...

Page 9: ...e delay setting is at six times the pickup current Field Ground Protection Pickup 1 2 5 to 100 KΩ 1 KΩ 10 or 1KΩ Time Delay 1 2 1 to 8160 Cycles 1 Cycle 2 IF 1 Sec Injection Frequency IF 0 10 to 1 00 Hz 0 01 Hz Brush Lift Off Detection measuring control circuit Pickup 0 to 5000 mV 1 mV Time Delay 1 to 8160 Cycles 1 Cycle 2 IF 1 Sec When 64F is purchased an external Coupler Module M 3921 is provide...

Page 10: ...s greater when both RMS and Line Ground to Line Line are selected Current 5 A rating 0 1 A or 3 whichever is greater 1 A rating 0 02 A or 3 whichever is greater Power 0 01 PU or 2 whichever is greater Frequency 0 02 Hz from 57 to 63 Hz for 60 Hz models from 47 to 53 Hz for 50 Hz models Oscillographic Recorder The oscillographic recorder provides comprehensive data recording of all monitored wavefo...

Page 11: ...ct form c are all rated per ANSI IEEE C37 90 1989 for tripping Make 30 A for 0 2 seconds carry 8 A break 6 A at 120 V ac break 0 1 A at 125 V dc inductive break 0 1 A Any of the functions can be individually programmed to activate any one or more of the eight programmable output contacts Target Status Indicators and Controls The RELAY OK LED reveals proper cycling of the microcomputer The BRKR CLO...

Page 12: ...arth 3 500 V dc for 1 minute applied between each independent circuit 1 500 V dc for 1 minute applied to IRIG B circuit to earth 1 500 V dc for 1 minute applied between IRIG B to each independent circuit 1 500 V dc for 1 minute applied between RS 485 to each independent circuit Impulse Voltage IEC 255 5 5 000 V pk polarity applied to each independent circuit to earth 5 000 V pk polarity applied be...

Page 13: ...08 Industrial Control Equipment CSA Certified per C22 2 No 14 95 Industrial Control Equipment Physical Size 19 00 wide x 5 21 high x 10 20 deep 48 3 cm x 13 2 cm x 25 9 cm Mounting The unit is a standard 19 semiflush three unit high rack mount panel design conforming to ANSI EIA RS 310C and DIN 41494 Part 5 specifications Vertical or horizontal panel mount options are available Approximate Weight ...

Page 14: ... 13 M 3425 Generator Protection Relay Figure 1 External Connections ...

Page 15: ...g with Third Harmonic 100 Ground Fault Protection Low impedance Grounding with Overcurrent Stator Ground Fault Protection This function is available as a standard protective function This function is available as a optional protective function This function provides control for the function to which it points NOTE Some functions are mutually exclusive see Instruction Book for details M 3425 Typica...

Page 16: ...mpedance Grounding with Overcurrent Stator Ground Fault Protection This function is available as a standard protective function This function is available as a optional protective function This function provides control for the function to which it points NOTE Some functions are mutually exclusive see Instruction Book for details M 3425 Typical Connection Diagram Configured for Split Phase Differe...

Page 17: ...n 40 41 38 39 42 43 M 3425 OR OR 45 44 High Impedance Grounding M 3425 58 59 56 57 54 55 M 3425 57 56 55 54 M 3425 59 58 57 56 55 54 M 3425 59 58 OR OR M 3425 53 52 A B C A B C A B C A B C M 3921 Field Ground Coupler Module 10 11 52b M 3425 OR Low Impedance Grounding M 3425 42 43 40 41 38 39 Two VT Open Delta Connection A B C 40 41 38 39 42 43 M 3425 Three VT Wye Wye Connection Ungrounded A B C Fi...

Page 18: ...n NOTE Dimensions in brackets are in centimeters RECOMMENDED CUTOUT WHEN RELAY IS NOT USED AS STANDARD RACK MOUNT Rear View 0 40 1 02 x 0 27 0 68 SLOT 4x Figure 5 Horizontal Mounting Dimensions NOTE Panels for vertical mounting are available When mounted vertically the target module will be located at the top and all front panel text will be horizontally aligned Consult Beckwith Electric Co for de...

Page 19: ...in brackets are in centimeters 17 78 44 65 18 58 47 19 2 25 5 72 1 71 4 34 19 00 48 26 17 31 43 97 Actual 5 59 14 20 5 65 13 41 17 45 44 32 ACTUAL 0 40 1 02 x 0 27 0 68 SLOT 4x Rear View RECOMMENDED CUTOUT WHEN RELAY IS NOT USED AS STANDARD RACK MOUNT Figure 6 Vertical Mounting Dimensions ...

Page 20: ...with the following tests and standards Voltage Withstand Isolation 4 kV ac for 1 minute all terminals to case Impulse Voltage IEC 255 5 5 000 V pk 1 2 by 50 µs 0 5 J 3 positive and 3 negative impulses at 5 second part 5 intervals per minute Electrical Interference Electrostatic Discharge Test IEC 1000 4 2 Class 4 8 kV point contact discharge Fast Transient Disturbance Tests IEC 1000 4 4 Class 4 4 ...

Page 21: ...ERN WITHOUT TABS Field Ground Coupler 4 72 11 99 7 87 19 99 2 96 REF 7 52 3 54 9 0 nNOTE Dimensions in brackets are in centimeters 7 40 18 79 9 06 23 01 3 54 9 0 18 DIA 0 46 4 X CO INC EL ECT RIC BECKWITH Made in U S A M 3921 Figure 8 M 3921 Field Ground Coupler Mounting Dimensions BECKWITH ELECTRIC CO INC 6190 118th Avenue North Largo Florida 33773 3724 U S A PHONE 727 544 2326 FAX 727 546 0121 E...

Page 22: ...ing equipment in a test area the Protective Earth Terminal must be attached to a separate ground securely by use of a tool since it is not grounded by external connectors Do NOT operate in an explosive environment Do not operate this equipment in the presence of flammable or explosive gases or fumes To do so would risk a possible fire or explosion Keep away from live circuits Operating personnel m...

Page 23: ...atures are maintained Always replace components with those of equal or better quality as shown in the Parts List of the Instruction Book Avoid static charge This unit contains MOS circuitry which can be damaged by improper test or rework procedures Care should be taken to avoid static charge on work surfaces and service personnel Use caution when measuring resistances Any attempt to measure resist...

Page 24: ... 50 50N Instantaneous Overcurrent Phase Neutral Circuits 2 25 50BF Generator Breaker Failure 50N HV Breaker Flashover 2 26 50DT Definite Time Overcurrent for split phase differential 2 28 51N Inverse Time Neutral Overcurrent 2 29 51T Inverse Time Positive Sequence Overcurrent for Stator Thermal Protection 2 30 51V Inverse Time Phase Overcurrent with Voltage Control Restraint 2 32 50 27 Inadvertant...

Page 25: ...op Network Setup 4 2 Setting up the M 3425 Generator Protection Relay for Communications 4 3 Installing the Modems 4 3 4 2 Installation and Setup IPScom 4 4 Hardware Requirements 4 5 Installation 4 5 Installing IPScom 4 5 Installing IPSutil 4 5 4 3 Operation 4 5 Activating Communications 4 5 Overview 4 7 File Menu 4 7 Comm Menu 4 8 Relay Menu 4 9 Window Menu Help Menu 4 15 4 4 Checkout Status Mete...

Page 26: ...eutral 6 21 32 Directional Power 3 Phase 6 22 40 Loss of Field 6 24 46 Negative Sequence Overcurrent Definite Time 6 25 46 Negative Sequence Overcurrent Inverse Time 6 26 50 Instantaneous Phase Overcurrent 6 27 50BF Breaker Failure 6 28 50 27 Inadvertant Energizing 6 30 50DT Definite Time Overcurrent for Split Phase Differential 6 31 50N Instantaneous Neutral Overcurrent 6 32 51N Inverse Time Neut...

Page 27: ...rd Harmonic Undervoltage 27TN Protection Characteristics 2 16 2 8 Tripping on Low Forward Power in Positive Direction Toward System 2 18 2 9 Tripping on Low Foward Power in Negative Direction Toward Generator 2 19 2 10 Loss of Field 40 Protective Approach 1 2 21 2 11 Loss of Field 40 Protective Approach 2 2 21 2 12 Negative Sequence Overcurrent Inverse Time Curves 2 24 2 13 Breaker Failure Logic D...

Page 28: ... Box 4 11 4 10 Configure Dialog Box 4 12 4 11 Unit Date Time Dialog Box 4 13 4 12 Target Dialog Box 4 14 4 13 About IPScom Dialog Box 4 15 4 14 Primary Status Dialog Box 4 16 4 15 Secondary Status Dialog Box 4 16 4 16 Phase Distance Dialog Box 4 17 4 17 Loss of Field Dialog Box 4 17 4 18 Out of Step Dialog Box 4 18 4 19 Phasor Dialog Box 4 18 4 20 Function Status Dialog Box 4 19 4 21 IPSutil Main ...

Page 29: ...urrent Inputs Configuration C2 6 4 6 5 Current Configuration C3 6 5 6 6 Status LED Panel 6 8 6 7 M 3925 Target Module Panel 6 8 6 8 M 3931 Human Machine Interface HMI Module 6 9 6 9 COM1 COM2 Loopback Plug 6 9 6 10 RS 485 2 Wire Testing 6 10 6 11 Current Input Configuration 6 13 6 12 Voltage Input Configuration 6 13 6 13 Field Ground Coupler Calibration 6 14 6 14 Field Ground Coupler 6 41 Appendix...

Page 30: ...erse D 14 D 12 IEC Curve 4 Long Time Inverse D 15 Tables Page Chapter 1 1 1 M 3425 Device Functions 1 3 Chapter 2 2 1 Phase Distance 21 Setpoint Ranges 2 9 2 2 Impedance Calculation 2 9 2 3 Volts Per Hertz 24 Setpoint Ranges 2 12 2 4 RMS Undervoltage 3 Phase 27 Setpoint Ranges 2 15 2 5 Third Harmonic Undervoltage 27TN Neutral Circuit Setpoint Ranges 2 16 2 6 Directional Power 3 Phase 32 Setpoint R...

Page 31: ...ff Detection 64B Setpoint Ranges 2 40 2 21 Typical Brush Lift off Settings 2 40 2 22 Field Ground Protection 64F Setpoint Ranges 2 41 2 23 Typical Frequency Settings 2 42 2 24 Out of Step 78 Setpoint Ranges 2 43 2 25 Frequency 81 Setpoint Ranges 2 45 2 26 Rate of Change of Frequency 81R Setpoint Ranges 2 47 2 27 Ground Differential 87GD Setpoint Ranges 2 48 2 28 Differential 87 Setpoint Ranges 2 4...

Page 32: ...n U S A 9 21 01 Appendix B B 1 Communication Port Signals B 2 Appendix C C 1 Self Test Error Codes C 1 C 2 IPScom Error Messages C 3 Appendix D D 1A M 3425 Inverse Time Overcurrent Relay Characteristic Curves D 6 D 1B M 3425 Inverse Time Overcurrent Relay Characteristic Curves D 7 ...

Page 33: ...x M 3425 Instruction Book This Page Left Intentionally Blank ...

Page 34: ...tics required by the protective relay and describes the individual function settings Chapter 3 Operation Chapter Three is designed for the person s responsible for the operation direct setting and configuration of the relay Chapter Three provides information on the operation and interpretation of the unit s front panel controls and indicators including operation of the optional M 3931 HMI and M 39...

Page 35: ...ator Protection Relay is a microprocessor based unit that uses digital signal processing technology to provide up to twenty six protective relaying functions for generator protection The relay can protect a generator from internal winding faults system faults and other abnormal conditions The available internal functions of the relay are listed in Table 1 1 The nomenclature follows the standards o...

Page 36: ... a i t n e r e f f i D e c n e u q e s o r e z d n u o r G t x E s n o i t c n u F l a n r e t x E s n o i t c n u F e v i t c e t o r P l a n o i t p O T 1 5 e c n e u q e S e v i t i s o P e m i T e s r e v n I l a m r e h T r o t a t S r o f t n e r r u c r e v O n o i t c e t o r P B 4 6 F 4 6 n o i t c e t o r P d n u o r G d l e i F n o i t c e t e D f f O t f i L h s u r B Table 1 1 M 3425 ...

Page 37: ...UT LEDs will be lit as long as the corresponding output contact is picked up TARGETS OUTPUTS OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 OUT 8 24 VOLTS HZ 27 PHASE UNDERVOLTAGE 59 PHASE OVERVOLTAGE 27TN 64S 100 STATOR GND 59N NEUTRAL OVERVOLTAGE 32 DIRECTIONAL POWER 21 PHASE DISTANCE 40 LOSS OF FIELD 78 OUT OF STEP 50BF BREAKER FAILURE 50 27 INADVERTENT ENRGNG 60FL V T FUSE LOSS PHASE OVERCURRENT 50...

Page 38: ...e chosen before entering the settings for the individual functions Both may be recorded on the Relay Configuration Table in Appendix A Configuration Record Forms Chapter Two is designed for the person or group responsible for the application of the M 3425 Generator Protection Relay It includes functional and connection diagrams for a typical application of the relay and describes the configuration...

Page 39: ...l Protection 51V Inverse Time Phase Overcurrent with Voltage Control Restraint 59 RMS Overvoltage 3 Phase 1 2 59N RMS Overvoltage Neutral 1 2 60FL Fuse Loss Detection 64B Brush Lift Off Detection 64F Field Ground Protection 1 2 78 Out of Step 81 Frequency 1 2 3 4 81R Rate of Change of Frequency 1 2 87 Phase Differential 87GD Ground Differential External 1 2 The relay allows the user to designate u...

Page 40: ... gnd to line line selection should be used only for a VT nominal secondary voltage of 69V not for 120 V For this selection the nominal voltage setting entered should be line line nominal voltage which is S3 times line ground nominal voltage By enabling the Delta Y Transform the relay will internally consider the 30 phase shift through the delta wye unit transformer for 51V and 21 functions This sc...

Page 41: ...subsequent state of the initiating function Individual Seal In settings are available for all outputs This designates the active state for the individual status input Programming uppercase see I6 causes the active or operated condition to be initiated by the external contact opening Other wise external contact closure will activate the input Ratio of the phase VTs Ratio of the neutral VT Ratio of ...

Page 42: ...M 3425 M 3425 High impedance Grounding with Third Harmonic 100 Ground Fault Protection Low impedance Grounding with Overcurrent Stator Ground Fault Protection This function is available as a standard protective function This function is available as a optional protective function This function provides control for the function to which it points M 3425 Typical Connection Diagram Figure 2 1 One Lin...

Page 43: ... Third Harmonic 100 Ground Fault Protection Low impedance Grounding with Overcurrent Stator Ground Fault Protection This function is available as a standard protective function This function is available as a optional protective function This function provides control for the function to which it points M 3425 Typical Connection Diagram Configured for Split Phase Differential Figure 2 2 Alternativ...

Page 44: ...125 V 220 V 250 V AC 110 V 120 V 230 V 240 V 62 63 UTILITY SYSTEM A B C 48 49 46 47 Other Relays M 3425 50 51 Generator Other Relays 52 Gen A B C Three VT Wye Wye Connection 40 41 38 39 42 43 M 3425 OR OR 45 44 High Impedance Grounding M 3425 58 59 56 57 54 55 M 3425 57 56 55 54 M 3425 59 58 57 56 55 54 M 3425 59 58 OR OR M 3425 53 52 A B C A B C A B C A B C M 3921 Field Ground Coupler Module 10 1...

Page 45: ...ctional Power 3 Phase 2 18 40 Loss of Field 2 20 46 Negative Sequence Overcurrent 2 23 50 50N Instantaneous Overcurrent Phase and Neutral Circuits 2 25 50BF Breaker Failure HV Breaker Flashover 2 26 50DT Definite Time Overcurrent for split phase differential 2 28 51N Inverse Time Neutral Overcurrent 2 29 51T Inverse Time Positive Sequence Overcurrent for Stator Thermal Protection 2 30 51V Inverse ...

Page 46: ... Table 2 2 All impedance settings are secondary relay quantities and can be derived from the following formula Z SEC ZPRI x RC RV where ZSEC secondary reflected impedance ZPRI primary impedance RC current transformer ratio and RV voltage transformer ratio The minimum current sensitivity depends on the programmed reach diameter and offset If the current is below the minimum sensitivity current the ...

Page 47: ...igure 2 4 Phase Distance 21 Coverage A negative or positive offset can be specified to offset the mho circle from the origin This offset is usually set at zero See Figure 2 5 Phase Distance 21 Function Applied For System Backup The impedance angle should be set as closely as possible to the actual impedance angle of the zone being protected The time delays are set to coordinate with the primary pr...

Page 48: ... Range Zone 1 X R X R M 3425 Protected Range Zone 2 Figure 2 4 Phase Distance 21 Coverage jX R jX R Circle Diameters System Impedance Angle Unit Transformer Transmission Line Figure 2 5 Phase Distance 21 Function Applied for System Backup ...

Page 49: ...olves determining the desired protection levels and operating times The first step is to plot the combined generator and associated unit transformer overexcitation capability limits This data is typically available from the manufacturer and should be plotted on the same voltage base Depending on the resulting characteristic one of the four families of inverse time curves as shown in Appendix D Inv...

Page 50: ...V Hz before it has cooled to normal operating levels damage could be caused before the V Hz trip point is reached For this reason a linear reset characteristic adjustable to take into account the cooling rate of the unit is provided If a subsequent V Hz excursion occurs before the reset characteristic has timed out the time delay will pick up from the equivalent point as a on the curve The Reset R...

Page 51: ...Definite time setpoint 2 could be programmed to alarm alerting the operator to take proper control action to possibly avoid tripping Time to operation at any V Hz value exceeding Definite time setting 2 The pickup value is the V Hz value at which the chosen inverse curve begins protective operation Typical value is 105 Allows the user to designate the appropriate curve family for this protection a...

Page 52: ...surement depends on the 59 27 Magnitude Select setting See Section 2 1 Configuration Relay System Setup When the RMS option is selected the magnitude calculation is accurate over a wide frequency range 10 to 80 Hz and the accuracy of the time delay is 20 cycles If DFT option is selected the magnitude calculation is accurate near 50 or 60 Hz and the timer accuracy is 1 cycle N O I T C N U F E G N A...

Page 53: ...ent positive sequence undervoltage element or forward power flow element or both Supervision can prevent tripping when the generator field is not energized or the unit is not yet synchronized The 27TN setting depends on the actual third harmonic neutral voltage level seen during normal operation of the generator The setting should be about 50 of the minimum third harmonic voltage observed during v...

Page 54: ... grounding transformer ratio Generally set for approximately 50 of the minimum third harmonic voltage observed during various loading conditions An inhibit voltage setting is required if 27TN 1 is enabled Gener ally set equal to 80 90 of nominal voltage In some generation applications it is desirable to supervise the operation of the 27TN with power flow from the generator In those applications en...

Page 55: ... trip in the reverse direction negative programmed Pickup setting when the measured real power is less than more negative or equal to the Pickup setting This configuration can be used for sequential tripping when power is below the setting The ranges and increments are presented in Table 2 6 When tripping is desired for reverse power flow or very small forward power values the Low Forward Power se...

Page 56: ...ith a time delay in order to prevent mis operation during power swing conditions Typical time delay settings are 20 to 30 seconds When Low Forward Power is enabled regardless of the direction of power the relay will trip when the real power measurement is less than or equal to the pickup setpoint If used positive direction power settings can be used for overload protection providing either alarm o...

Page 57: ...settings of the offset mho elements should be such that the relay detects the loss of field condition for any loading while not mis operating during power swings and fault conditions Two approaches are widely used in the industry both of which are supported by the M 3425 relay Both approaches require knowledge of the reactances and other parameters of the generator They are described in Figure 2 1...

Page 58: ... Excitation Final Impedance Locus Figure 2 10 Loss of Field 40 Protective Approach 1 X R R X Underexcited 1 1 Xd X d 2 13 XT Minimum Exciter Limit Machine Capability Steady State Stability Limit Directional Element Heavy Load Light Load Loss of Excitation Final Impedance Locus Block Direction Trip Direction Figure 2 11 Loss of Field 40 Protective Approach 2 ...

Page 59: ...ngs The second approach is shown in Figure 2 11 Loss of Field 40 Protective Approach II In this approach one of the mho elements is set with an offset of X l d 2 a diameter of 1 1 Xd Xl d 2 and a time delay of 10 to 30 cycles The second element is set to coordinate with the generator minimum excitation limit and steady state stability limit In order to obtain proper coordination the offset of this...

Page 60: ... are lower than that is shown in Figure 2 12 when measured current values are greater than 15 A 3 A for 1 A rated circuit The first task of setting this function is to determine the capabilities of the associated machine As established by ANSI standards the machine limits are expressed as I2 2 t K The value of K is established by the machine design and is generally provided on test sheets of the m...

Page 61: ...ximum trip time is used to reduce the longer trip times asso ciated with low to moderate imbalances to a preset time 46DT PICKUP ________ 46DT DELAY ________ Cycles 46IT PICKUP ________ 46IT TIME DIAL ________ 46IT MAX DELAY ________ Cycles NOTE When the phase current exceeds 3X I nominal the operating times will be greater than those shown 0 24 seconds for 50 Hz units Figure 2 12 Negative Sequenc...

Page 62: ... used in conjunction with external breaker failure protection Ranges and Increments are presented in Table 2 9 N O I T C N U F E G N A R T N I O P T E S T N E M E R C N I 0 5 t n e r r u c r e v O s u o e n a t n a t s n I p u k c i P A 0 0 4 2 o t 1 0 A 0 8 4 o t 1 0 A 1 0 e s n o p s e R e m i T p i r T s e l c y C 2 N 0 5 l a r t u e N t n e r r u c r e v O s u o e n a t n a t s n I p u k c i P...

Page 63: ...ecause faults and abnormal operating conditions such as ground faults overexcitation over under frequency and reverse power may not produce enough current to operate the current detectors For this reason the breaker status input 52b contact must be used in addition to the 50BF Ph to provide adequate breaker status indication Implementation of the generator breaker failure function is illustrated i...

Page 64: ... the relay set ENABLE set the neutral pickup amps and enable and set the phase element If generator breaker failure function is used in this application ENABLE here and set phase pickup amps Designate the status inputs which will initiate the breaker failure timer Designate the outputs that will initiate the breaker failure timer For generator breaker failure protection the time delay should be se...

Page 65: ...k c i P A 0 0 4 2 o t A 2 0 A 0 8 4 o t 2 0 1 0 2 1 C e s a h P p u k c i P A 0 0 4 2 o t A 2 0 A 0 8 4 o t 2 0 1 0 2 1 y a l e D e m i T s e l c y C 0 6 1 8 o t 1 e l c y C 1 D G 7 8 d n a 7 8 F B 0 5 l a i t n e r e f f i d e s a h p t i l p s r o f d e s u s i n o i t c n u f T D 0 5 n e h W d e l b a s i d e b t s u m s n o i t c n u f Table 2 11 Definite Time Overcurrent 50DT Setpoint Ranges ...

Page 66: ... p u k c i P A 0 0 2 1 o t 5 2 0 A 0 4 2 o t 5 0 0 A 1 0 0 e v r u C c i t s i r e t c a r a h C e s r e v n I y r e V e s r e v n I e m i T e t i n i f e D s e v r u C C E I e s r e v n I y l e m e r t x E g n i t t e S p a T A 0 0 2 1 o t 5 0 A 0 4 2 o t 0 1 0 A 1 0 0 g n i t t e S l a i D e m i T 0 1 1 o t 5 0 s e v r u C C E I 0 1 1 o t 5 0 0 1 0 1 0 0 Table 2 12 Inverse Time Neutral Overcurre...

Page 67: ... 0 0 1 o t 0 1 0 e l c y C 1 s c i t s i r e t c a r a h C t e s e R r a e n i L p i r t f o d l o h s e r h t m o r f s e t u n i m 4 t n e r r u c p u k c i p e h t s e m i t x i s t a s i y a l e d e m i t s i h T Table 2 13 Inverse Time Positive Sequence Overcurrent 51T Setpoint Ranges 51T PICKUP ________ Amps 51T DELAY 600 PICKUP ________ Sec This setting is the operating time of the function...

Page 68: ... 31 100 0 80 0 60 0 40 0 20 0 10 0 8 0 6 0 4 0 2 0 1 0 0 8 0 6 0 4 0 2 0 1 0 06 0 04 0 02 0 01 Time Seconds Current in Multiples of Pickup 1 0 2 0 4 0 6 0 8 0 10 0 20 0 I2 t K Curves Figure 2 13 Inverse Time Curve 51T ...

Page 69: ...ion the function is not active unless the voltage is below the voltage control setpoint This philosophy is used to confirm that the overcurrent is due to system fault When applied most users will set voltage control limits in the range of 0 7 to 0 01 per unit RMS voltage When voltage restraint is selected See Figure 2 15 Voltage Restraint 51VR Characteristic the pickup setting is continuously modi...

Page 70: ...the tap setting is modified as shown in Figure 2 15 If voltage control is designated the 51V will only operate when the voltage is less than the 51V voltage control setting specified below When applied the voltage control is usually set in the range of 70 to 90 of the nominal voltage d e t c e n n o C y l t c e r i D r o t a r e n e G h g u o r h T d e t c e n n o C r o t a r e n e G r e m r o f s...

Page 71: ...otor can cause significant damage in a matter of seconds Voltage supervised overcurrent logic is designed to provide this protection See Figure 2 16 Inadvertent Energizing Function Logic Diagram An undervoltage element all three phase voltages must be below pickup with adjustable pickup and dropout time delay supervises instantaneous overcurrent tripping The undervoltage detectors automatically ar...

Page 72: ...since this function is only operational when the generator is off line The purpose of the undervoltage detector is to determine whether the unit is connected to the system The voltage level during this accidental energization depends on the system strength Typical setting is 50 70 of rated voltage The pickup time delay is the time for the unit to operate to arm the protection It must coordinate wi...

Page 73: ...p When the RMS option is selected the magnitude calculation is accurate over a wide frequency range 10 to 80 Hz and the accuracy of the time delay is 20 cycles If DFT option is selected the magnitude calculation is accurate near 50 or 60 Hz and the timer accuracy is 1 cycle Ranges and increments are presented in Table 2 17 N O I T C N U F E G N A R T N I O P T E S T N E M E R C N I 9 5 e g a t l o...

Page 74: ...ion is not acceptable the coordination problem can be alleviated by grounding one of the secondary phase conductors instead of the secondary neutral When this technique is used the coordination problem still exists for ground faults on the secondary neutral Thus its usefulness is limited to those applications where the exposure to ground faults on the secondary neutral is small Since system ground...

Page 75: ...ernal logic is not considered to be reliable the FL blocking selection should not be chosen The 60FL function can also be initiated via the external status inputs thus accommodating other fuse loss detection schemes Any combination OR logic of status input IN1 through IN6 may be used to initiate operation A timer associated with the fuse loss logic is available This timer is to assure proper coord...

Page 76: ... 20 The typical pickup settings for different open brush capacitances are listed in Table 2 21 Typical Brush Lift Off Settings In order to assure correct setting it is recommended that the actual operating value be predetermined during the final stage of the relay installation By introducing the brush open condition the actual value can be easily obtained from the relay The following procedure can...

Page 77: ...k c i P V m 0 0 0 5 o t 0 V m 1 y a l e D e m i T s e l c y C 0 6 1 8 o t 1 e l c y C 1 Table 2 20 Brush Lift Off Detection 64B Setpoint Ranges e c n a t i c a p a C f f O t f i L h s u r B t n e l a v i u q E f f O t f i L h s u r B l a c i p y T g n i t t e S p u k c i P 5 2 0 5 0 0 µF V m 0 0 5 2 Table 2 21 Typical Brush Lift Off Settings ...

Page 78: ...t 0 1 0 z H 1 0 0 d l e i f c d m o r f n o i t a l o s i e d i v o r p o t 1 2 9 3 M e l u d o m r e l p u o c l a n r e t x e s e r i u q e R s e g a t l o v Table 2 22 Field Ground Protection 64F Setpoint Ranges PROTECTION RELAY M 3425 M 3921 Coupler Ground Machine Frame Brushes Exciter Gen Rotor 37 35 36 TB5 Shield TB4 TB1 TB3 TB2 TB1 Vf Vout Return Signal Measurement Squarewave Generator Vin ...

Page 79: ...n a t i c a p a C d n u o r G g n i t t e S y c n e u q e r F l a c i p y T 1 2 o t µF z H 2 5 0 3 o t 2 µF z H 9 4 0 4 o t 3 µF z H 6 4 0 5 o t 4 µF z H 3 4 0 5 6 o t µF z H 9 3 0 7 o t 6 µF z H 5 3 0 8 o t 7 µF z H 2 3 0 9 o t 8 µF z H 0 3 0 0 1 o t 9 µF z H 8 2 0 0 1 µF z H 6 2 0 Table 2 23 Typical Frequency Settings 8 8 8 8 8 WARNING Machine should be off line and field excitation should be of...

Page 80: ... n A e c n a d e p m I 0o 0 9 o t o 1o r e d n i l B 0 0 5 o t 1 0 Ω 0 0 5 2 o t 5 0 Ω 1 0 Ω y a l e D e m i T s e l c y C 0 6 1 8 o t 1 e l c y C 1 r e t n u o C p i l S e l o P 0 2 o t 1 1 t e s e R p i l S e l o P s e l c y C 0 6 1 8 o t 1 e l c y C 1 Table 2 24 Out of Step 78 Setpoint Ranges Consider for example Figure 2 18 If the out of step swing progresses to impedance Z0 t0 the MHO element...

Page 81: ...Y ________ Cycles 78 TRIP ON MHO EXIT disable enable 78 POLE SLIP COUNT ________ slips 78 POLE SLIP RESET TIME ________ Cycles A B Z3 t3 Z2 t2 Z1 t1 Z0 t0 Figure 2 17 Out of Step Relay Characteristics A negative or positive offset can be specified to offset the mho circle from the origin The blinder impedance should be programmed less than the set diameter ...

Page 82: ...e due to this vibration can lead to cracking of the blade structure Sample settings of the 81 function are shown in Figure 2 19 The frequency functions are automatically disabled when the input voltage positive sequence is less than about 5 V N O I T C N U F E G N A R T N I O P T E S T N E M E R C N I 1 8 y c n e u q e r F 4 3 2 1 p u k c i P z H 0 0 7 6 o t 0 0 0 5 z H 0 0 7 5 o t 0 0 0 4 z H 1 0...

Page 83: ...f pro hibited operation restricted time operation and continuous allow able operation The underfrequency function is usually connected to trip the machine whereas the overfrequency function is generally connected to an alarm In order to prevent mis operation during switching transients the time delay should be set to greater than five 5 cycles 81 1 PICKUP ________ Hz 81 1 DELAY ________ Cycles 81 ...

Page 84: ...0 c e S z H 1 0 0 2 1 y a l e D e m i T s e l c y C 0 6 1 8 o t 1 e l c y C 1 e c n e u q e S e v i t a g e N t i b i h n I e g a t l o V 9 9 o t 0 1 Table 2 26 Rate of Change of Frequency 81R Setpoint Ranges 81R 1 PICKUP ________ Hz s 81R 1 DELAY ________ Cycles 81R 2 PICKUP ________ Hz s 81R 2 DELAY ________ Cycles 81R NEG SEQ VOLT INHIBIT ________ negative sequence voltage to block 81R function...

Page 85: ...ly less than 0 2 A in which case the algorithm automatically disables the directional element and the 87GD function becomes non directional differential The pickup quantity is then calculated as the difference between the corrected triple zero sequence current RC 3I0 and the neutral current IN The magnitude of the difference x RC 3I0 IN x is compared to the relay pickup For security purposes durin...

Page 86: ...e secondaries These currents must be less than the minimum sensitivity of the relay N O I T C N U F E G N A R T N I O P T E S T N E M E R C N I 7 8 t n e r r u C l a i t n e r e f f i D e s a h P p u k c i P m u m i n i M A 0 0 3 o t A 0 2 0 A 0 6 0 o t 4 0 0 A 1 0 0 e p o l S t n e c r e P 0 0 1 o t 1 1 y a l e D e m i T s e l c y C 0 6 1 8 o t 1 e l c y C 1 2 1 1 n a h t s s e l s i e m i t e s ...

Page 87: ...d n a c i g o l l a n o i t i d d a e d i v o r p o t 5 2 4 3 M e h t d e m m a r g o r p e b n a c 6 T U P N I h g u o r h t 1 T U P N I s t c a t n o c t u p n i e h t f o e r o m y a l e d e m i t d e t c e l e s a r e t f a s t c a t n o c t u p t u o d e t a n g i s e d e t a v i t c a o t 2 1 y a l e D e m i T s e l c y C 0 6 1 8 o t 1 e l c y C 1 Table 2 29 External Functions Setpoint Range...

Page 88: ...IN5 IN6 FL EXT IN2 IN5 IN3 Designated Initating Contacts Designated Blocking Contacts Designated Output Contact Designated Output Contact AND OR NOT EXT Timer OUTPUT CONTACT 6 OUT 1 OUT 2 OUT 3 OUT 4 OUT 5 OUT 6 OUT 7 OUT 8 Figure 2 21 External Function Example ...

Page 89: ...M 3425 Instruction Book 2 52 This Page Left Intentionally Blank ...

Page 90: ...and right arrow buttons are used to choose among menu selections displayed When entering values the left and right arrow buttons are used to select the digit by moving the cursor of the displayed setpoint that will be increased or decreased by the use of the up and down buttons This chapter contains information that describes the operation direct setting and configuration of the M 3931 Human Machi...

Page 91: ... the breaker status input IN1 52b is open Target Indicators and Target Reset Upon any condition which causes the operation of outputs 1 through 8 the TARGET LED will light indicating a relay operation The TARGET LED will remain lit until the condition causing the trip is cleared and the operator presses the TARGET RESET button For units equipped with the optional M 3925 Target module additional ta...

Page 92: ...he same procedure applies when setting the relay through remote communication Following the steps outlined below are several sections which give additional detail concerning the settings required for proper commissioning Configuration Record forms are available in Appendix A Configuration Record Forms to record settings for future reference 1 Enter the Setup Unit data This is general information r...

Page 93: ...SERIAL NUMBER 137 01 Jan 1998 15 24 32 Power On Self Test and Status Screens Self Tests 53rd St Substation Beckwith Electric Co Beckwith Electric Co Beckwith Electric Co Beckwith Electric Co Software Version Serial Number System Date and Time Model Number D 0070V01 02 03 1269 M 3425 Beckwith Electric Co User Logo Figure 3 2 Screen Message Menu Flow M 3931 Human Machine Interface Module Optional M ...

Page 94: ...ltage Status Current Status Frequency Status Volts per Hertz Status Power Status Impedance Status In Out Status Timer Status Counters Time of Last Power Up Error Codes Checksums View Target History Clear Target History View Record Status Clear Records Recorder Setup COM 1 Setup COM 2 Setup COM 3 Setup Communication Address Comm Access Code COMMUNICATION targets osc_rec COMM VIEW TARGET HISTORY TAR...

Page 95: ...gnal via extra pins on the rear panel COM2 RS 232 interface connector Clear Output Alarm Counters and Error Codes These codes are self explanatory Also available under this submenu is the ability to read the software version and serial number as well as enter the Diagnostic Mode Note that while the relay is in Diagnostic Mode all protective functions are inoperative Setup System Data To input the ...

Page 96: ...sive data recording voltage current and status input output signals for all monitored waveforms at 16 samples per cycle Oscillograph data can be downloaded via the communications ports to any IBM compatible personal computer running the M 3820A IPScom Communications software package Once downloaded the waveform data can be examined and printed using the optional M 3801C IPSplot Oscillograph Data A...

Page 97: ... Pressing the ENTER button moves down within that menu allowing you to monitor values within that menu category To exit a specific category and continue to the next menu category press the EXIT button Some menus are dynamic and do not appear if certain functions are not purchased or are unavailable The menu categories for monitored values are Voltage Status phase voltages neutral voltage positive ...

Page 98: ...NDERVOLTAGE This screen gives access to the target history and also allows the user to clear the target history record from memory Using up and down buttons user may select which particular target to view from the last 24 recorded triggers This screen gives the date and time tag of the selected target This screen displays operated outputs This screen displays operated inputs at time of trip The fo...

Page 99: ...RENT STATUS TARGET 1 a 0 02 b 0 03 c 0 04 TARGET 1 N 0 50 AMPS This gives the phase pickup information for the specific function This screen shows the phase current at the time the target operated This screen displays the neutral current at the time the target operated ...

Page 100: ...s RTU s data concentrators modems or computers can be interfaced for direct on line real time data acquisition and control Generally all data available to the operator through the front panel of the relay with the optional M 3931 HMI module is accessible remotely through the BECO 2200 or MODBUS data exchange protocol These protocol documents and the database specific protocol document are availabl...

Page 101: ...k Setup Individual remote addressing also allows for communications through a serial multidrop network Up to 32 relays can be connected using the same 2 wire RS 485 communications line Appendix B Figure B 2 illustrates a setup of RS 232 Fiber Optic network and Figure B 3 illustrates a 2 wire RS 485 network Other communication topologies are possible using the M 3425 Generator Protection Relay An A...

Page 102: ...tial setup of the relay for communication must be completed by the optional M 3931 HMI Module or via direct serial connection For units shipped without the optional HMI Module the communication parameters may be altered by first establishing communication using the default parameters and the IPSutil program IPSutil is an auxiliary program shipped on the same disk with the IPScom program It is used...

Page 103: ...nnect the unit to an external modem by attaching a standard RS 232 modem cable to the appropriate serial communications port on both the unit and the modem b Connect the modem to the telephone line and power up The modem attached to the unit must have the following AT command configuration E0 No Echo Q1 Don t return result code D3 On to OFF DTR hang up and reset S0 DSR always on C1 DCD ON when det...

Page 104: ... any valid IPScom command s as desired 5 To end communication when communicating by modem choose the Hang Up command button from the expanded Communication dialog box To close the communication channel when connected locally choose the Close COM command button Hardware Requirements IPScom will run on any IBM PC compatible computer that provides at least the following 8 Mb of RAM Microsoft Windows ...

Page 105: ...Setup Exit Alt F4 Cascade Tile Arrange Icons Close All Choosing the Comm menu sends you directly to the Communication dialog box Help Contents Using Help About Profile Info Help Comm File Relay Window IPScom User Logo Lines Unit Identifier Unit Address Relay Type Setup Retrieve Trigger Clear File Setup System Setpoints Set Date Time Display Reset LED Clear History A 1 M 3425 Primary Status Seconda...

Page 106: ...ile dialog box see Figure 4 4 Choosing the OK command button allows the new data file to be named by using the Save or Save As commands NOTE By choosing the NEW command unit and setpoint configuration values are based on factory settings specified for the profiled protection system X System Type Unit Type M 3425 Nominal Frequency C T Secondary Rating Phase Rotation 50 Hz 60 Hz 1 A 5 A ABC ACB OK C...

Page 107: ...unication Communication X PC Port COM1 Baud Rate 1200 4800 2400 9600 Echo Cancel Open COM Close COM Modem Cancel Access Code Address 1 Relay Phone Number Add Edit Delete Save Modem Bring up terminal window after dialing Initialize Dial Hang Up Figure 4 5 Communication Dialog Box Path Comm menu COMMAND BUTTONS Open COM Initiates contact with the protective system either by direct serial or modem co...

Page 108: ...en Close Open Close Open Close Open Close V T Configuration Line to Ground Line to Line Line Ground to Line Line 59 27 Mag Select Phase Rotation V T Phase Ratio V T Neutral Ratio C T Phase Ratio C T Neutral Ratio ABC ACB RMS DFT 50 DT Split Phase Operation Enable Disable 1 0 1 0 1 1 1 1 0 1 1 0 1 1 1 1 6550 0 6550 0 65500 65500 Relay Seal in time 2 cycles 8160 cycles OUT 1 2 3 4 5 6 7 8 30 30 30 3...

Page 109: ... 9 This dialog contains a list of settings for each relay within a single window to allow scrolling through all relay setpoint configuration values Choosing the Configure command button displays the Configure dialog box see Fig 4 10 which contains a chart of programmed input and output contacts in order to allow scrolling through all relay output and blocking input configurations Both dialog boxes...

Page 110: ...y 30 cycles 1 Circle Diameter Offset Impedance Angle Time Delay 2 24 VOLTS per HERZ Definite Time 2 1 Pickup Time Delay 1 2 Pickup Time Delay 108 V 30 cycles Pickup Time Delay Pickup Time Delay 108 V 30 cycles Inverse Time Pickup 106 Char Curves 1 Time Dial 10 Reset Rate 200 Sec 27 RMS UNDERVOLTAGE t t 110 360 cycles Figure 4 9 All Setpoints Table Dialog Box Path Relay menu Setup submenu Setpoints...

Page 111: ... 1 1 1 1 1 1 1 3 5 6 FL FL FL 7 1 1 1 1 1 1 1 1 5 5 8 7 6 5 4 3 2 1 O U T P U T Figure 4 10 Configure Dialog Box Path Relay menu Setup submenu Setpoints window Configure command button JUMP HOTSPOTS This window provides you with jump hotspots identified by the hand icon that take you to each relay dialog box Exiting any of these dialog boxes will return you to the Configure dialog box CONTROL MENU...

Page 112: ...Scom main window Any changes to the displayed information is lost The Monitorsubmenu provides access for reviewing the present status of the relay s measured and calculated values other real time parameters and conditions as well as examining real time and historical demand metering information see Section 4 4 Checkout Status Metering A cascading menu appears providing several command options as s...

Page 113: ...log Box Path Relay menu Targets submenu Display window Time is displayed in milliseconds when the IRIG B time synchronization is used When the IRIG B is not used the millisecond part of the time stamp reads 000 COMMAND BUTTONS Comment Opens comment dialog box for annotation Print Prints out selected target information with comment Save Saves selected target information with comment as a text file ...

Page 114: ...nu Help Menu Window Cascade Tile Arrange Icons Close All The Window menu enables the positioning and arrangement of all IPScom windows so that there is better access to available functions This feature allows the display of several windows at the same time Clicking on an inactive window activates that window Currently in revision the Help menu will enable the user to look up information about any ...

Page 115: ... These are calculated values based on the VT and CT inputs IPSCOM Primary Status W X W X 0 A 1 M 3425 File Comm Relay Window Help 0 0 AB 0 000 A a diff 0 000 Phase c 0 000 0 000 Phase a Phase b 0 00 I diff G 0 00 C c diff 0 00 B b diff 0 0 Stator 0 000 Zero Seq 0 000 Neg Seq 0 000 Pos Seq 0 000 Neurtal 0 000 Phase C 0 000 0 000 Phase A 0 0 BC 0 0 0 0 CA 0 0 Neutral 0 0 Pos Seq 0 0 Neg Seq 0 0 Zero...

Page 116: ...L BUTTONS Move up the scope window Move down the scope window Move the scope window to the left 10 10 20 30 40 50 60 70 0 80 30 20 10 10 20 30 40 Circle Diameter Circle Offset 134 2 Ω 116 1 Ω Positive Sequence Impedance Loss of Field Ω X 177 5 Ω 68 9 Ω Figure 4 17 Loss of Field Dialog Box Path Relay menu Monitor submenu Loss of Field window Loss of Field window shows a graphic representation of lo...

Page 117: ... Toggle display current channel information p Freeze Toggle update information 20 15 10 5 10 15 20 Circle Diameter Circle Offset 0 1 W 10 0 W Positive Sequence Impedance Out of Step W X 3 End Impedance Trip or Ended Exit 100 0 W ENABLED 15 10 5 5 10 15 20 25 Circle Impedance Angle 0 Figure 4 18 Out of Step Dialog Box Path Relay menu Monitor submenu Out of Step window Move the scope window to the r...

Page 118: ...ped P T T P 21 1 Phase Distance 21 2 Phase Distance 24DT 1 Volts Hz DEF 24DT 2 Volts Hz DEF 24IT Volts Hz INV 27 1 Phase Undervoltage 27 2 Phase Undervoltage 27 IN 1 Neutral Undervoltage 27 IN 2 Neutral Undervoltage 32 1 Directional Power 32 2 Directional Power 40 1 Loss of Field 40 2 Loss of Field 46DT Neg Seq Overcurrent DEF 46IT Neg Seq Overcurrent INV 50 Phase Overcurrent 50 27 Inadvertent Ene...

Page 119: ...e menu bar Left Arrow Right Arrow To move between menus Up Arrow Down Arrow To move between commands A character key To choose the menu or command The underlined character matches the one you type Enter To choose the selected menu name or command Esc To cancel the selected menu name or to close the open menu DIALOG BOX KEYS These keys are useful when working in a dialog box Alt a character key To ...

Page 120: ...ge provides communication with the Beckwith Integrated Protection System IPS for setting up the relays Its main purpose is to aid in setting up IPS relays that are ordered without the optional front panel HMI interface 8 8 8 8 8 WARNING For convenience Beckwith Electric distributes both the IPScom and IPSutil programs on the same disk The user should be aware however that the IPSutil program has t...

Page 121: ... Menu Connect Exit Alt F4 Comm The Comm menu allows you to make connections to the relay This is the first command you must use to access the unit After you click the Connect submenu item the Communications dialog box appears See Figure 4 24 Select the correct PC communication port where the null modem cable is connected for the relay Select the baud rate of the relay Factory default is 9600 baud ...

Page 122: ...libration Advanced The Miscellaneous menu allows you to set and monitor some of the relay parameters The Setup command allows you to change the users Logo information test outputs assign communication address and user control number phase rotation OK LED flash mode in the relay Note that the highest number used for the communication address is 255 and the highest control number allowed is 9999 See...

Page 123: ...ously The time at which the dialog box was opened is the time that is displayed and remains as such This is true whether the relay is synchronized with the IRIG B signal or not Help Menu Help About Under Help the About submenu provides you the information on the IPSUtil version numbers COM1 COMM X PC Port Access Code Baud Rate 300 1200 4800 600 2400 9600 Open COM Close COM Cancel Figure 4 24 Commu...

Page 124: ... xxxx xxxx xxxx xxxx Level 1 Level 2 Level 3 Figure 4 28 Change User Access Code Dialog Box COMMAND BUTTONS OK Sends the currently displayed information to the relay Cancel Returns you to the IPSutil main window Any changes to the displayed information are lost Output Test Relay 8 7 6 5 4 3 2 1 OFF ON x SETUP User Logo Line1 Line2 BECKWITH ELECTRIC CO M 3520 Enable ABC Disable ACB User Control Num...

Page 125: ...1 3 A B C M 3425 Instruction Book 4 26 This Page Left Intentionally Blank ...

Page 126: ...s suggested the terminal connections illustrated here be transferred to station one line wiring and three line connection diagrams station panel drawings and station DC wiring schematics If during the commissioning of the M 3425 Generator Protection Relay additional tests are desired Chapter 6 Testing may be consulted The operation of the relay including the initial setup procedure is described in...

Page 127: ...9 00 48 26 17 78 44 65 18 58 47 19 2 35 5 96 1 35 3 42 Standard 19 Horizontal Mount Chassis n NOTE Dimensions in brackets are in centimeters RECOMMENDED CUTOUT WHEN RELAY IS NOT USED AS STANDARD RACK MOUNT Rear View 0 40 1 02 x 0 27 0 68 SLOT 4x Figure 5 1 M 3425 Mounting Dimensions Horizontal Chassis ...

Page 128: ... centimeters 17 78 44 65 18 58 47 19 2 25 5 72 1 71 4 34 19 00 48 26 17 31 43 97 Actual 5 59 14 20 5 65 13 41 17 45 44 32 ACTUAL 0 40 1 02 x 0 27 0 68 SLOT 4x Rear View RECOMMENDED CUTOUT WHEN RELAY IS NOT USED AS STANDARD RACK MOUNT Figure 5 2 M 3425 Mounting Dimensions Vertical Chassis ...

Page 129: ...0 48 26 6 19 15 72 Max Depth of Unit Front View 10 50 26 67 Recommended Panel Cutout Dimensions 39 0 99 18 21 46 25 8 72 22 15 2 80 7 12 2 80 7 12 8 72 22 15 2 25 5 71 1 91 4 85 n NOTE Dimensions in brackets are in centimeters Figure 5 3 H2 Mounting Dimensions ...

Page 130: ... 19 38 8 72 22 15 Max Depth of Unit Front View 10 50 26 67 8 72 22 15 2 80 7 12 2 80 7 12 2 60 6 60 1 14 Recommended Panel Cutout Dimensions 15 56 39 52 18 50 46 99 5 56 14 12 1 04 2 64 n NOTE Dimensions in brackets are in centimeters Figure 5 4 H3 Mounting Dimensions for GE L 2 Cabinet ...

Page 131: ...CSA listing terminal block connections must be made with No 12 AWG solid or stranded copper wire inserted in an AMP 324915 or equivalent connector and wire insulation used must be rated at 60 minimum Torque Requirements Terminals 1 34 7 5 in lbs minimum and 8 0 in lbs maximum Terminals 35 63 8 5 in lbs minimum and 9 0 in lbs maximum 8 8 8 8 8 WARNING ONLY DRY CONTACTS must be connected to inputs t...

Page 132: ...40 V 62 63 UTILITY SYSTEM A B C 48 49 46 47 Other Relays M 3425 50 51 Generator Other Relays 52 Gen A B C Three VT Wye Wye Connection 40 41 38 39 42 43 M 3425 OR OR 45 44 High Impedance Grounding M 3425 58 59 56 57 54 55 M 3425 57 56 55 54 M 3425 59 58 57 56 55 54 M 3425 59 58 OR OR M 3425 53 52 A B C A B C A B C A B C M 3921 Field Ground Coupler Module 10 11 52b M 3425 OR Low Impedance Grounding ...

Page 133: ...olarities of the VT connections and change connections to obtain proper polarities 9 Press ENTER until the unit displays 3RD HARMONIC NTRL VOLT 0 00 Volts 5 3 Commissioning Checkout During field commissioning check the following to ensure that the CT and VT connections are correct 1 Press ENTER After a short delay the unit should display VOLTAGE RELAY VOLT curr freq v hz pwr 2 Press the right arro...

Page 134: ...with the measured values using a meter If there is a discrepancy check the CT connections to the rear terminal block of the unit 16 Press ENTER for the unit to display DIFFERENTIAL CURRENT A B C Differential current should be near zero amps If a significant amount of differential current is present check the CT polarities 17 Press ENTER for the unit to display NEUTRAL CURRENT ______ Amps The Neutr...

Page 135: ... imped i o timer 24 Press ENTER to display real power and check its sign The unit should display REAL POWER __________ pu W The sign should be positive for forward power and negative for reverse power If the sign does not agree with actual conditions check the polarities of the three neutral end CTs and or the PTs 25 Press ENTER for the unit to display REACTIVE POWER ________ PU VAr 26 Press ENTER...

Page 136: ...h s 3 M O C 5 J B A 2 M O C 6 n i p n o l a n g i s L T T B G I R I d e t a l u d o m e D C B t l u a f e D C N B l a n g i s B G I R I d e t a l u d o M NOTE Short circuit protection 100 ma limit is incorporated on pins 1 and 9 when used for 15V Table 5 1 Jumpers p u 3 p u 4 e d o M n u R p u 3 n w o d 4 t l u a f e d o t M O R P E E e z i l a i t i n I n w o d 3 p u 4 n o i t a c i n u m m o C d...

Page 137: ...2 D5 D3 C108 C107 U41 D13 U8 R122 E112 R5 D75 CO INC C26 TP6 E30 R3 C2 D1 C115 C114 E105 R91 R83 C113 U36 R143 C200 C30 C201 C23 C157 C29 1 U3 TP2 C20 P8 1 10 9 18 6 D80 R147 C22 E187 C24 C218 C112 C118 C220 TP3 C116 C199 C219 C119 U35 C117 C84 C150 P4 1 TP1 5 10 TP4 C3 ELECTRIC BECKWITH C202 Q8 E200 1 R146 J48 C34 J46 Q10 C16 C203 Y1 E143 E142 B 1 R22 A E47 U18 C R92 C205 C204 E145 1 U37 E184 C21...

Page 138: ...vercurrent 6 28 50BF 50BF N Breaker Failure 6 29 50 27 Inadvertent Energizing 6 31 50DT Definite Time Overcurrent for Split Phase Differential 6 32 50N Instantaneous Neutral Overcurrent 6 33 51N Inverse Time Neutral Overcurrent 6 34 51T Inverse Time Positive Sequence Overcurrent for Stator Thermal Protection 6 35 51V Inverse Time Phase Overcurrent with Voltage Control Restraint 6 36 59 RMS Overvol...

Page 139: ...e phase to simulate VT inputs 4 Three phase independent current sources 0 to 25 A variable phase to simulate CT inputs 5 Electronic timer accurate to at least 8 ms 6 For relays with the 64F B option a Resistor decade box capable of 500 ohms to 150 kOhms able to step in 100 ohm increments b Capacitors ranging from 0 15 mf to 10 µf Setup 1 Connect system power to the power input terminals 62 hot and...

Page 140: ...2 2 3 0 4 6 4 0 5 7 2 0 5 F B 0 5 T D 0 5 N 0 5 N 1 5 T 1 5 V 1 5 9 5 N 9 5 L F 0 6 B 4 6 F 4 6 8 7 1 8 R 1 8 7 8 D G 7 8 1 2 T D 4 2 T I 4 2 7 2 N T 7 2 2 3 0 4 6 4 0 5 7 2 0 5 F B 0 5 T D 0 5 N 0 5 N 1 5 T 1 5 V 1 5 9 5 N 9 5 L F 0 6 B 4 6 F 4 6 8 7 1 8 R 1 8 7 8 D G 7 8 Table 6 1 Functions to Disable When Testing ...

Page 141: ...les shown here use lead ing angles as positive and lagging angles as neg ative Some manufacturers of test equipment have used lagging angles as positive in which case VB 120 V a120 and VC 120 V a240 Sim ilarly other voltages and currents phase angles should be adjusted These test configurations are for ABC phase rotation They must be adjusted appropriately for ACB phase rotation Ia 0 55 54 57 56 5...

Page 142: ...5 Testing 6 Figure 6 5 Current Configuration C3 Current Input 1 Polarity 55 aø 54 I a 0 57 bø 56 I b 59 cø 58 I c 120 o 240 o Current Input 2 Polarity 47 AØ 46 I A 0 49 BØ 48 I B 51 CØ 50 I C 120 o 240 o ...

Page 143: ...uttons are used to move within the diagnostic menu After EXIT is pushed PRESS EXIT TO EXIT DIAGNOSTIC MODE is displayed Output Test Relay The first step in testing the operation of the function outputs is to confirm the positions of the outputs in the unoperated or OFF position This can be accomplished by connecting a DMM Digital Multimeter across the appropriate contacts and confirming open or cl...

Page 144: ... down arrow buttons to turn all relays or outputs to the energized or ON position Note that when each output is turned on the appropriate red OUTPUT LED turns on and stays on The DMM can now be used to verify the position of the output contacts in the operated or ON position The readings should be the opposite of the initial reading above All outputs should be returned to their initial de energize...

Page 145: ...utput input led TARGET 2 Press ENTER Target LED 1 lights and the following is displayed TARGET LED TEST LED NUMBER 1 ON 3 Repeat step 2 for each LED shown in Figure 6 7 When all LEDs have been tested press EXIT to return to the DIAGNOSTIC MODE menu Pressing the TARGET RESET button on the front panel also provides a simultaneous test for all TARGET LEDs Expanded Input Output Test Not implemented at...

Page 146: ...loopback plug required consists of a DB9P connector male with pin 2 RX connected to pin 3 TX and pin 7 RTS connected to pin 8 CTS No other connections are necessary Button Test The BUTTON TEST menu selection allows the user to check the M 3931 HMI Module buttons As each button is pressed its name is displayed BECKWITH ELECTRIC CO M 3425 EXIT ENTER a a a a Figure 6 8 M 3931 Human Machine Interface ...

Page 147: ...d terminal emulator software installed 1 When COM2 LOOPBACK TEST is displayed press the right arrow button until the following is displayed COM3 ECHO TEST 2 WIRE com1 com2 COM3 clock 2 Press ENTER The following is displayed COM3 ECHO TEST 2WIRE IDLING 9600 N 8 1 3 On the rear of the unit connect a PC to the relay at terminals 3 and 4 via RS 485 converter set for 2 wire operation See Figure 6 10 fo...

Page 148: ... arrow key to select ON and press Enter The unit will display FLASH RELAY OK LED DONE 4 Press Exit to return to the former menu Auto Calibration Refer to the following Section 6 3 Auto Calibration for more information on that function AUTO CALIBRATION clock led CAL factory Factory Use Only This function is provided to allow access by factory personnel FACTORY USE ONLY clock led cal FACTORY 6 3 Aut...

Page 149: ... Hz models 6 Remove the calibration source inputs If you wish to calibrate the third harmonic continue to Third Harmonic Calibration If not press EXIT to exit calibration mode Third Harmonic Calibration 1 If the user wishes to calibrate the third harmonic only follow the Step 1 and 2 procedures for calibration above and press the down arrow when the display reads CONNECT 60 Hz INPUTS The display w...

Page 150: ... Figure 6 13 Field Ground Coupler Calibration 2 Enter the Calibration menu in Diagnostic mode and select the FIELD_GND item and press ENTER The display will show CONNECT 1KOHM REF PRESS ENTER TO CALIBRATE 3 Set the decade box for 1kΩ resistance and press ENTER When the display shows DONE press ENTER 4 Set the decade box to the resistance specified by the HMI and press ENTER When the display shows ...

Page 151: ...te Capacitor to simulate Field Winding Capacitance Cf Rf Shorted during calibration Remove before placing into service If the rotor is NOT connected the value of Cf should approximate the rotor capacitance If the rotor is connected Cf is NOT required Figure 6 13 Field Ground Coupler Calibration 8 WARNING The jumper used to short pins 2 3 must be removed when calibration is complete Placing the M 3...

Page 152: ...possible to download the relay settings into a file using IPScom It may be desirable to program all test settings in an alternate profile or to save the relay settings in IPScom to preserve desired setup The tests are described in this section in ascending function number order as used in Chapter 2 Application Depending on which functions are to be tested at a given time an order may be determined...

Page 153: ...the LEDs will turn off The unit will display POWER ON SELFTESTS PASS The model number BECKWITH ELECTRIC CO M 3425 where xx xx x x signifies the software revision BECKWITH ELECTRIC D 0024xx xx x where xxx signifies the unit serial number BECKWITH ELECTRIC CO SERIAL NUMBER xxx The POWER LED s will turn on The RELAY OK LED will flash or stay on as programmed in the setup menu and the BREAKER CLOSED L...

Page 154: ...operation is to be expected for an individual setting is as follows a Define reach as R ohms P ohms O ohms O usually set at zero ohms b Define current as I Selected Voltage S3 I R ohms The voltage level may be selected based on the desired test current level 5 Pickup Test Set the three phase voltages to the Selected Voltage value from step 4b Set the phase angle between the voltage and current inp...

Page 155: ...rent at which operation is to be expected for an individual setting is as follows a Define reach as R ohms P ohms O ohms O usually set at zero ohms b Define current as I Selected Voltage IR ohms The voltage level may be selected based on the desired test current level 5 Pickup Test Set the three phase voltages to the Selected Voltage value from step 4b Set the phase angle between the voltage and c...

Page 156: ...kup level at a percentage setting at nominal frequency 50 or 60 Hz is Pickup voltage P 100 x Nominal Voltage where the Nominal Values have been programmed in the system setup data described in Section 2 1 Configuration and are recorded on the COMMUNICATION UNIT SETUP RECORD FORM 5 Pickup Test Hold the TARGET RESET button in and slowly increase the voltage on A phase until the 24 VOLTS HZ LED light...

Page 157: ...the VOLTS HZ LED light goes on or the pickup indicator operates on the computer target screen The voltage level of operation will equal P volts 1 Release the TARGET RESET button and decrease the voltage and the output LEDs will go out Press TARGET RESET button to remove targets 8 Time Test With output contacts Z connected to stop the timer apply voltage equal to the chosen test level calculated in...

Page 158: ...ation Set at Nominal Voltage 4 Pickup Test Hold the TARGET RESET button in and slowly decrease the input voltage on phase A until 27 PHASE UNDERVOLTAGE LED light goes on or the pickup indicator operates on the computer target screen The voltage level should be equal to P volts 0 5 V Release the TARGET RESET button and increase the input to the nominal voltage and the OUTPUT LEDs will go out Press ...

Page 159: ...ested 3 Connect inputs in Configuration V2 designated above See Section 6 1 Equipment Test Setup for configuration Set at Nominal Voltage 4 Pickup Test Hold the TARGET RESET button in and slowly decrease the neutral voltage until 27TN 64S 100 STATOR GND LED light goes on or the pickup indicator operates on the computer target screen The voltage level should be equal to P volts 0 15 V or 1 Release ...

Page 160: ... by the Nominal Current previously input to the relay This value is described in Section 2 1 Configuration and should be recorded on Figure A 2 Communication Data and Unit Setup Record Form 5 Set the three phase voltages to the Nominal Voltage 6 Pickup Test Press and hold the TARGET RESET button and slowly increase the three phase currents for negative or reverse power flow direction the phase ang...

Page 161: ...ltiply the PU pickup value P above by the Nominal Current previously input to the M 3425 This value is described in Section 2 1 Configuration and should be recorded on Figure A 2 Communication Data and Unit Setup Record Form 5 Set the three phase voltages to the Nominal Voltage 6 Pickup Test Press and hold the TARGET RESET button and slowly increase the three phase currents 30 angle for each phase...

Page 162: ...e selected based on the desired test current level c Define offset current as IO Selected Voltage O ohms 5 Set the three phase voltages VA VB and VC to the Selected Voltage value from step 4 and set the phase angle between the voltage and current inputs to 90 current leading voltage 6 Pickup Test Press and hold the TARGET RESET button and slowly increase the three phase currents until the appropri...

Page 163: ...minal voltage 4 The level of current at which operation is to be expected for an individual setting is Pickup current P 100 x Nominal Current where the Nominal Values have been programmed in the system setup data described in Section 2 1 Configuration and should be recorded on Figure A 2 Communication Data and Unit Setup Record Form 5 Pickup Test Press and hold the TARGET RESET button and slowly i...

Page 164: ... in the system setup data described in Section 2 1 Configuration and should be recorded on Figure A 2 Communication Data and Unit Setup Record Form 5 Test levels may be chosen at any percentages of Nominal Current which are a minimum of 5 higher than the pickup percentage P Suggest 4 or 5 test levels chosen and calculated in amps 6 Set the three phase voltages VA VB and VC to the Nominal Voltage 7...

Page 165: ...1 and C1 designated above See Section 6 1 Equipment Test Setup Set the three phase voltages VA VB and VC to the Nominal Voltage value 4 Pickup Test Hold the TARGET RESET button in and slowly increase current input 3 C phase until the PHASE OVERCURRENT 50 LED light goes on or the pickup indicator operates on the computer target screen The current level of operation will be P amps 0 1 amps or 3 Rele...

Page 166: ...e made 6 Press and hold the TARGET RESET button and slowly increase current input 3 until the 50BF BREAKER FAILURE LED light goes on or the pickup indicator operates on the computer target screen The current level of operation will be P amps 0 1 amps or 2 Release the TARGET RESET button and decrease the current and the OUTPUT LEDs will go out Press TARGET RESET button to remove targets 7 Time Test...

Page 167: ...ntacts Z connected to the timer initiate operation by externally shorting any ONE set of contacts I IN except Input 1 above The operating time will be D cycles within 1 cycle or 1 14 If testing is complete enable any functions disabled for this test If other tests are to be completed check the proper functions to disable for the next test and proceed from this configuration ...

Page 168: ...NT ENRGNG LED light goes on or the pickup indicator operates on the computer target screen The level of operation will be P amps 0 1 A or 2 5 27 Undervoltage Test If desired the dropout time delay T can be set to minimum setting for this test Hold the TARGET RESET button in and slowly increase the voltage input continuing current input in step 4 Wait at least T cycles between each voltage change T...

Page 169: ...e tested 3 Connect inputs in Configuration V1 and C2 designated above See Section 6 1 Equipment Test Setup Set the three phase voltages VA VB and VC to the Nominal Voltage value 4 Pickup Test Hold the TARGET RESET button in and slowly increase current input 1 A phase until the PHASE OVERCURRENT 50 LED light goes on or the pickup indicator operates on the computer target screen The current level of...

Page 170: ...ration V1 designated above Set the three phase voltages VA VB and VC to the Nominal Voltage value See Section 6 1 Equipment Test Setup 4 Pickup Test Hold the TARGET RESET button in and slowly increase current input IN terminals 53 and 52 until the NEUTRAL OVERCURRENT 50N LED light goes on or the pickup indicator operates on the computer target screen The current level of operation will be P amps 0...

Page 171: ...e Relay Data for procedure 2 Confirm settings to be tested 3 Connect inputs in Configuration V1 designated above Set the three phase voltages VA VB and VC to the Nominal Voltage value 4 Refer to Appendix D Figures D5 D12 or Tables D 1A and D 1B Test levels may be chosen in terms of multiples of pickup value and associated time in seconds Suggest 4 or 5 test levels chosen and calculated in amps 5 T...

Page 172: ...ation V1 and C1 designated above See Section 6 1 Equipment Test Setup Set the three phase voltages VA VB and VC to the Nominal Voltage value 4 Pickup Test Hold the TARGET RESET button in and slowly increase positive sequence current input 3 until the POS SEQ OVERCURRENT 51T LED light goes on or the pickup indicator operates on the computer target screen The current level of operation will be P amp...

Page 173: ... input voltages at least 5 under the Voltage Control setting V 6 Time Test With output contacts Z connected to stop the timer input current equal to the chosen test level calculated in step 4 on A phase and start timing The operating time will be as read from the appropriate Inverse Curve Family and K Time Dial setting in Appendix D Figures D 5 through D 8 or Tables D 1A through D 1B Repeat this s...

Page 174: ... Set Voltages Nominal voltage 4 Pickup Test Press and hold the TARGET RESET button and slowly increase the input voltage on phase A until 59 PHASE OVERVOLTAGE LED light goes on or the pickup indicator operates on the computer target screen The level should be equal to P volts 0 5 V or 0 5 Release the TARGET RESET button and decrease the input voltage to nominal voltage and the OUTPUT LEDs will go ...

Page 175: ...or procedure 2 Confirm settings to be tested 3 Connect voltage input to terminal numbers 44 and 45 4 Pickup Test Press and hold the TARGET RESET button and slowly increase the input voltage VN until 59N NEUTRAL OVERVOLTAGE LED light goes on or the pickup indicator operates on the computer target screen The level should be equal to P volts 0 5 V or 0 5 Release the TARGET RESET button and decrease t...

Page 176: ... See Section 6 1 Equipment Test Setup for configurations 4 Adjust the three phase voltage source to Nominal volts and the three phase current source to Nominal amps 5 Time Test With output contacts connected to the timer remove the A phase voltage input and start timing and the 60FL V T FUSE LOSS LED and output Z LEDs will light or the pickup indicator operates on the computer target screen The op...

Page 177: ...ET RESET button in and slowly decrease the resistance on the decade box until the FIELD GND BRUSH LIFT 64F B LED or the pickup indicator on the IPScom Function Status screen illuminates The level of operation will be P kW 1kW or 10 Release the TARGET RESET button and increase the resistance and the OUTPUT LED s will extinguish Press the TARGET RESET button again to remove targets 6 Time Test With ...

Page 178: ...rewave Generator Signal Measurement and Processing Vout Vf Rear Terminal Block Pin No Coupling Network M 3921 DC Supply 37 35 36 5 4 1 3 2 1 Decade Box or Discrete Resistor to simulate Fault Resistance Discrete Capacitor to simulate Field Winding Capacitance Cf Rf 60 to 100 V dc source simulates Exciter Supply Voltage If the rotor is NOT connected the value of Cf should approximate the rotor capac...

Page 179: ...y under the VOLTAGE menu in MONITOR STATUS Set the pickup P to 110 of the displayed value 5 Pickup Test Hold the TARGET RESET button in and open Cf and the FIELD GND BRUSH LIFT 64F B LED or the pickup indicator on the IPScom Function Status screen will illuminate Connect the capacitor Cf before starting the timing test Press the TARGET RESET button again to remove targets 6 Time Test With output c...

Page 180: ...e to expire Continue to sweep the current angle to point Z2 and verify output Z operates as point Z2 is crossed and resets after the seal in time delay Blocking on Stable Swing Test Reset impedance to a point outside of the mho circle Adjust voltages and currents to point Z0 Press and hold the TARGET RESET button and sweep past point Z1 Verify the 78 OUT OF STEP LED comes on or the function status...

Page 181: ...GET RESET button in and slowly increase the frequency on the input voltage s until the appropriate FREQUENCY ROCOF 81 81R LED light goes on or the pickup indicator operates on the computer target screen The level will be equal to P Hz 0 02 Hz only if P is within 3 Hz of Fnom otherwise 0 1 Hz Return to nominal input frequency and OUTPUT LEDs will go out Press TARGET RESET button to remove targets F...

Page 182: ...ency of the ramp and assign a unique output see figure below The frequencies given are suggested for testing rates below 10 Hz Sec Higher rates will require consideration of the capabilities of the test equipment involved Connect both of these outputs to an input with jumpers and set the 81R function to block on this input Set the time delays and seal in times of the 81 functions to minimum This w...

Page 183: ...ltage levels The 81R OUTPUT should reset when the negative sequence voltage is N 0 5 of the positive sequence voltage 7 Timer Test Reset targets and apply Nominal Voltage to all three phases at a sweep rate 25 below P With output contacts Z connected to stop the timer apply a sweep rate 25 above P and start timing The contacts will close after D cycles within 20 cycles or K3 8 If testing is comple...

Page 184: ... individually or IA and Ia may be exchanged 5 Timer Test With output contacts Z connected to stop the timer apply at least 10 higher IA input 2 current than the minimum pickup level and start timing The contacts will close after D cycles within 1 cycle or 1 When the Time Delay is set to 1 cycle the relay operation is less than 1 1 2 cycles 6 Slope Test Define any number of testing points desirable...

Page 185: ...inals 53 and 52 until the GND DIFF CURRENT 87GD LED light goes on or the pickup indicator operates on the computer target screen The current level of operation will be equal to P amps 0 1 A or 5 Release the TARGET RESET button and decrease the current and the OUTPUT LEDs will go out Press TARGET RESET button to remove targets 5 Timer Test With output contacts Z connected to stop the timer apply at...

Page 186: ...RNAL EXT LED and output Z LEDs will light or the pickup indicator operates on the computer target screen 3 Blocking Input Test To test the designated blocking inputs press and hold the TARGET RESET button and short see step 2 input terminals one at a time designated as blocking inputs The EXTERNAL EXT LED will go out 4 Open initiating contact and press TARGET RESET button between contact closures ...

Page 187: ...M 3425 Instruction Book 6 50 This Page Left Intentionally Blank ...

Page 188: ...he Communication and Setup unit menus This form records definition of the parameters necessary for communication with the relay as well as access codes user logo lines date time setting and front panel display operation Figure A 3 Functional Configuration Record Form reproduces the Configure Relay menus For each function or setpoint refer to the configuration you have defined using the Relay Confi...

Page 189: ...locked by fuse loss INPUTS Columns Designated function blocking input s N O I T C N U F D O U T P U T S I N P U T S 8 7 6 5 4 3 2 1 L F 6 5 4 3 2 1 7 2 1 2 N T 7 2 1 2 9 5 1 2 N 9 5 1 2 6 4 F E D V N I 0 5 7 2 0 5 F B 0 5 T D 0 5 1 2 N 0 5 N 1 5 T 1 5 V 1 5 7 8 D G 7 8 1 8 1 2 3 4 R 1 8 1 2 4 2 1 2 4 2 2 3 1 2 0 4 1 2 L F 0 6 1 2 1 2 8 7 B 4 6 F 4 6 T X E 1 2 Table A 1 Relay Configuration Table ...

Page 190: ... not move within the menus or between menu displays E The Right Left arrows are used only to make horizontally displayed choices These can be either menu choices or input value digit choices The previous choice or location in a menu is highlighted immediately F The ENTER pushbutton records the setting change and moves down within a menu The operator will notice that after the last menu item ENTER ...

Page 191: ... LEVEL 1 level 2 level 3 LEVEL 1 ________ ENTER ACCESS CODE level 1 LEVEL 2 level 3 LEVEL 2 ________ ENTER ACCESS CODE level 1 level 2 LEVEL 3 LEVEL 3 ________ USER CONTROL NUMBER vers sn access NUMBER USER CONTROL NUMBER ________ USER LOGO LINE 1 LOGO1 logo2 out alrm USER LOGO LINE 1 ________ USER LOGO LINE 2 logo1 LOGO2 out alrm USER LOGO LINE 2 ________ CLEAR OUTPUT COUNTERS logo1 logo2 OUT alr...

Page 192: ...N 2 RELAY OUTPUT o8 o7 o6 o5 o4 o3 o2 o1 CONFIGURE RELAY CURRENT_RELAY 46DT NEG SEQ CURRENT DEF disable enable 46DT BLOCK INPUT fl i6 i5 i4 i3 i2 i1 46DT RELAY OUTPUT o8 o7 o6 o5 o4 o3 o2 o1 46IT NEG SEQ CURRENT INV disable enable 46IT BLOCK INPUT fl i6 i5 i4 i3 i2 i1 46IT RELAY OUTPUT o8 o7 o6 o5 o4 o3 o2 o1 50 INST OVERCURRENT disable enable 50 BLOCK INPUT fl i6 i5 i4 i3 i2 i1 50 RELAY OUTPUT o8...

Page 193: ...UTPUT o8 o7 o6 o5 o4 o3 o2 o1 81 4 FREQUENCY disable enable 81 4 BLOCK INPUT fl i6 i5 i4 i3 i2 i1 81 4 RELAY OUTPUT o8 o7 o6 o5 o4 o3 o2 o1 81R 1 RATE OF CHNG FREQ disable enable 81R 1 BLOCK INPUT fl i6 i5 i4 i3 i2 i1 81R 1 RELAY OUTPUT o8 o7 o6 o5 o4 o3 o2 o1 81R 2 RATE OF CHNG FREQ disable enable 81R 2 BLOCK INPUT fl i6 i5 i4 i3 i2 i1 81R 2 RELAY OUTPUT o8 o7 o6 o5 o4 o3 o2 o1 CONFIGURE RELAY VO...

Page 194: ...PUT o8 o7 o6 o5 o4 o3 o2 o1 78 OUT OF STEP disable enable 78 BLOCK INPUT fl i6 i5 i4 i3 i2 i1 78 RELAY OUTPUT o8 o7 o6 o5 o4 o3 o2 o1 CONFIGURE RELAY FIELD_GND_RELAY 64F 1 FIELD GROUND disable enable 64F 1 BLOCK INPUT fl i6 i5 i4 i3 i2 i1 64F 1 RELAY OUTPUT o8 o7 o6 o5 o4 o3 o2 o1 64F 2 FIELD GROUND disable enable 64F 2 BLOCK INPUT fl i6 i5 i4 i3 i2 i1 64F 2 RELAY OUTPUT o8 o7 o6 o5 o4 o3 o2 o1 CO...

Page 195: ...ne_line line_ground line_gnd_to_line_line DELTA Y TRANSFORM volt curr vt D_YTX rot DELTA Y TRANSFORM disable enable PHASE ROTATION volt curr vt d_ytx ROT PHASE ROTATION a c b a b c 59 27 MAGNITUDE SELECT MAG splt plse seal in 59 27 MAGNITUDE SELECT rms dft 50DT SPLIT PHASE OPERATE mag SPLT plse seal in SPLIT PHASE OPERATE enable disable PULSE RELAY mag splt PLSE seal in PULSE RELAY o8 o7 o6 o5 o4 ...

Page 196: ...LAY ________ Cycles 59N 2 PICKUP ________ Volts 59N 2 DELAY ________ Cycles CURRENT RELAY volt CURR freq v hz 46 NEG SEQ OVERCURRENT NEG_SEQ inst 46DT PICKUP ________ 46DT DELAY ________ Cycles 46IT PICKUP ________ 46IT TIME DIAL ________ 46IT MAX DELAY ________ Cycles 50 INST OVERCURRENT neg_seq INST 50 PICKUP ________ Amps 50 27 INADVERTANT ENRGNG INADVTNT_ENG brk_fail 50 27 PICKUP ________ Amps...

Page 197: ...inv ieci iecvi iecei ieclti 51V TIME DIAL ________ 51V VOLTAGE CONTROL disable v_cntrl v_rstrnt 51V VOLTAGE CONTROL ________ Volts 87 DIFFERENTIAL OVERCURR t_inv v_inv DIFF 87 PICKUP ________ Amps 87 SLOPE ________ 87 DELAY ________ Cycles 87GD GND DIFF OVERCURR G_DIFF 87GD PICKUP ________ Amps 87GD DELAY ________ Cycles 87GD C T RATIO CORRECT ________ FREQUENCY RELAY volt curr FREQ v hz 81 FREQUE...

Page 198: ...METER ________ Ohms 40 1 OFFSET ________ Ohms 40 1 VOLTAGE CONTROL disable enable 40 1 DELAY ________ Cycles 40 2 DIAMETER ________ Ohms 40 2 OFFSET ________ Ohms 40 2 VOLTAGE CONTROL disable enable 40 2 DELAY ________ Cycles 40 VOLTAGE CONTROL ________ Volts V T FUSE LOSS RELAY pwr lof FUSE dist 60FL V T FUSE LOSS FUSE 60FL INPUT INITIATE FL i6 i5 i4 i3 i2 i1 60FL DELAY ________ Cycles PHASE DIST...

Page 199: ...ms 78 IMPEDANCE ANGLE ________ Degrees 78 DELAY ________ CYCLES 78 TRIP ON MHO EXIT disable enable 78 POLE SLIP COUNT ________ Slips 78 POLE SLIP RESET TIME ________ Cycles PHASE DISTANCE RELAY pwr lof fuse DIST EXTERNAL RELAY rotor stator EXT EXTERNAL EXT EXT 1 INPUT INITIATE i6 i5 i4 i3 i2 i1 EXT 1 DELAY ________ Cycles EXT 2 INPUT INITIATE i6 i5 i4 i3 i2 i1 EXT 2 DELAY ________ Cycles Figure A ...

Page 200: ... supported on COM2 and COM3 valid selections are 8 N 2 8 O 1 or 8 E 1 3 ASCII mode is not supported RTU only 4 Standard baud rates from 300 to 9600 are supported 5 Only the following MODBUS commands are supported a read holding register function 03 b read input register function 04 c force single coil function 05 d preset single register function 06 For detailed information on IPScom communication...

Page 201: ...C D C D t c e t e D r e i r r a C a t a D 1 n i P B A D N G d n u o r G l a n g i S 5 n i P 5 n i P V 5 1 1 n i P V 5 1 9 n i P B G I R I L T T 6 n i P s r e p m u J d n a s e h c t i w S d r a o B t i u c r i C 4 5 n o i t c e S e e S l a n o i t p O V 5 1 m u m i x a m A m 0 0 1 5 1 Table B 1 Communication Port Signals NOTE Also see Tables 5 1 5 2 and Figure 5 7 1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 8...

Page 202: ... DCE DTE REP OFF DCE DTE REP OFF RS 232 RS 232 Echo Cancel On 25 pin or 9 25 pin Straight Through Cable FOC FOC FOC FOC DYMEC Fiber Optic Link Repeater Slave 1 Address 1 Slave 2 Address 2 Slave 3 Address 3 9 25 pin Straight Through Cables PC Master Figure B 2 RS 232 Fiber Optic Network ...

Page 203: ... between units all units should be mounted in the same rack If this is not possible fiber optics with the appropriate converters should be used for isolation NOTE Each address on the network must be unique Only the last physical slave on the network should have the termination resistor installed This may be completed externally or via a dip jumper internal to the unit See Section 5 4 Circuit Board...

Page 204: ... l b l a c i s y h p m u s k c e h c A M D 0 1 l i a f t s e T y r o m e M h p a r g o l l i c s O 1 1 l i a f M A R m a r g o r p l a n r e t x e P S D 2 1 l i a f t r e v n o c D A P S D 3 1 l i a f l e n n a h c d n u o r g P S D 4 1 l i a f l e n n a h c e c n e r e f e r P S D 5 1 l i a f n i a g A G P P S D 6 1 l i a f 1 t p u r r e t n i T S O H P S D P S D 7 1 l i a f t e s 2 t p u r r e t...

Page 205: ...w e t a d p u s e u l a V 3 3 r o r r E t r o b A 4 3 r o r r E t r a t s e R 5 3 r o r r E t p u r r e t n I 6 3 r o r r E p a r T 7 3 l i a f k c e h c g n i n n u r n o i t a r b i l a C 8 3 9 3 0 4 2 T N I e s i o n t p u r r e t n I 1 4 1 T N I e s i o n t p u r r e t n I 2 4 3 4 4 4 w o l f r e v o r e f f u b h p a r g o l l i c s O 5 4 w o l f r e d n u r e f f u b h p a r g o l l i c s O ...

Page 206: ...f i s t l u s e r r o r r e s i h T h t i w k c e B a t c a t n o C r o r r e l o c o t o r p n o i t a c i n u m m o c a s i s i h T d e s u e v i t a t n e s e r p e r y r o t c a f o C c i r t c e l E m u s k c e h C d i l a v n I d a e R n o i t a c i n u m m o c e h t h t i w s m e l b o r p e r a e r e h t f i s t l u s e r r o r r e s i h T y l t c e r r o c n i d e s u s i n o i t c n u f ...

Page 207: ...M 3425 Instruction Book C 4 This Page Left Intentionally Blank ...

Page 208: ...r Volts per Hertz functions Figures D 1 through D 4 and the second set is for the M 3425 functions which utilize the Inverse Time Overcurrent curves Figures D 5 through D 12 NOTE Table D 1A and D 1B on pages D 6 and D 7 contains a list of the data that characterizes Definite Time Inverse Time Very Inverse Time and Extremely Inverse Time Overcurrent Curves ...

Page 209: ...D 2 M 3425 Instruction Book Figure D 1 Volts Hz 24 Inverse Curve Family 1 Inverse Square ...

Page 210: ...Inverse Time Curves Appendix D D 3 Figure D 2 Volts Hz 24 Inverse Family Curve 2 ...

Page 211: ...D 4 M 3425 Instruction Book Figure D 3 Volts Hz 24IT Inverse Curve Family 3 ...

Page 212: ...Inverse Time Curves Appendix D D 5 Figure D 4 Volts Hz 24IT Inverse Curve Family 4 ...

Page 213: ... 6 6 5 1 0 2 2 4 5 5 6 3 0 7 5 2 2 7 1 2 1 8 2 1 1 0 2 8 7 4 1 0 3 2 3 9 2 5 3 0 4 9 0 4 5 1 6 2 6 1 0 1 8 6 2 2 3 1 0 4 2 5 1 1 4 3 0 4 0 1 9 3 1 7 0 2 2 9 0 0 5 2 9 1 1 0 5 2 8 1 0 3 3 0 1 6 5 6 2 1 0 9 1 4 8 0 1 2 2 8 0 1 0 6 2 9 9 9 1 3 0 5 4 9 5 1 1 1 0 3 7 7 0 0 8 7 8 9 0 0 7 2 7 5 0 1 3 0 1 7 8 6 0 1 4 3 3 1 7 0 6 2 6 0 9 0 0 8 2 9 8 1 0 3 0 9 4 0 9 9 0 7 2 1 6 6 0 7 2 5 3 8 0 0 9 2 2 9 3 9...

Page 214: ... 0 0 6 6 4 2 0 7 9 1 5 1 0 4 1 8 9 0 0 0 5 9 3 1 8 0 2 0 5 3 9 3 2 0 0 7 7 4 1 0 0 7 0 9 0 0 0 0 0 1 0 4 7 0 2 0 2 2 4 3 2 0 3 7 4 4 1 0 4 7 4 8 0 0 0 5 0 1 7 6 6 0 2 0 3 2 9 2 2 0 0 8 1 4 1 0 3 4 9 7 0 0 0 0 1 1 4 9 5 0 2 0 2 4 4 2 2 0 4 9 8 3 1 0 9 6 4 7 0 0 0 5 1 1 1 2 5 0 2 0 9 7 9 1 2 0 5 1 6 3 1 0 6 4 0 7 0 0 0 0 2 1 9 4 4 0 2 0 6 3 5 1 2 0 5 4 3 3 1 0 7 6 6 6 0 0 0 5 2 1 8 7 3 0 2 0 5 1 1 1...

Page 215: ...D 8 M 3425 Instruction Book Figure D 5 Definite Time Overcurrent Curve ...

Page 216: ...Inverse Time Curves Appendix D D 9 Figure D 6 Inverse Time Overcurrent Curve ...

Page 217: ...D 10 M 3425 Instruction Book Figure D 7 Very Inverse Time Overcurrent Curve ...

Page 218: ...Inverse Time Curves Appendix D D 11 Figure D 8 Extremely Inverse Time Overcurrent Curve ...

Page 219: ...M 3425 Instruction Book 0 01 0 1 1 10 100 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Multiple of Pickup Time in Seconds 1 1 1 0 9 0 8 0 6 0 4 0 2 05 Figure D 9 IEC Curve 1 Inverse t TD x 0 14 M0 02 1 ...

Page 220: ...e Curves Appendix D D 13 Figure D 10 IEC Curve 2 Very Inverse 0 01 0 1 1 10 100 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Multiple of Pickup Time in Seconds 1 1 1 0 9 0 8 0 6 0 4 0 2 05 K t TD x 13 5 M 1 ...

Page 221: ...25 Instruction Book Figure D 11 IEC Curve 3 Extremely Inverse 0 01 0 1 1 10 100 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Multiple of Pickup Time in Seconds 1 1 1 0 9 0 8 0 6 0 4 0 2 05 K t TD x 80 M2 1 ...

Page 222: ...Curves Appendix D D 15 Figure D 12 IEC Curve 4 Long Time Inverse 0 1 1 10 100 1000 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Multiple of Pickup Time in Seconds 1 1 1 0 9 0 8 0 6 0 4 0 2 K 05 t TD x 120 M 1 ...

Page 223: ...D 16 M 3425 Instruction Book This Page Intentionally Left Blank ...

Page 224: ... furnished under this contract In no event shall the Seller be liable for special incidental exemplary or consequential damages including but not limited to loss of profits or revenue loss of use of the equipment or any associated equipment cost of capital cost of purchased power cost of substitute equipment facilities or services downtime costs or claims or damages of customers or employees of th...

Page 225: ... ELECTRIC CO INC 6190 118th Avenue North Largo Florida 33773 3724 U S A PHONE 727 544 2326 FAX 727 546 0121 E MAIL marketing beckwithelectric com WEB PAGE www beckwithelectric com 1998 Beckwith Electric Co Printed in USA 800 3425 IB 02MC3 07 03 ...

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