6–56
850 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CURRENT ELEMENTS
CHAPTER 6: PROTECTION SETPOINTS
Figure 6-22: Restricted Ground Fault Protection Logic Diagram
89
$
1.cdr
SETPOINTS
RGF
1
FUNCTION
:
Alarm
Latched
Alarm
OR
AND
LED
: ALARM
/
LA
TCHED
ALARM
Command
AND
S
R
LA
TCH
#
1
Set
-
Dominant
Configurable
FlexLogic Operands
RGF
1
OP
SETPOINTS
Do Not Operate
, Operate
OUTPUT
RELA
Y
3 (X)
Source IB
Source IC
AND
SETPOINTS
RGF
1
BLOCK
:
Of
f
=
0
Source IA
Disabled
OR
RESET
Igd
Imax
Igd
>=
I pickup
RUN
SETPOINTS
RGF
1
PICKUP
DELA
Y
:
t
PKP
0
Select highest value
Imax
=
max
(I
a,
Ib
,Ic
)
Trip
Operate Output Relay 1 (TRIP
)
LED
: TRIP
AND
Igd
=
|3
Io
+
Ig
|
Calculate
3I
o
SETPOINTS
RGF
1
PICKUP
:
RGF
1
SLOPE
:
Source Ig
>
=
AND
SETPOINTS
RGF
1
GND CURR SUPER
V
:
Disabled
=
0
Enabled
=
1
RGF
1
GND CURR
SUPER
V LEVEL
:
Ig
>
I Level
OR
AND
RGF
1
PKP
LED
: PICKUP
RGF
1
Superv ON
METERING
I0
Ig
Igd
Currents
Summary of Contents for Multilin 850
Page 10: ...VIII 850 FEEDER PROTECTION SYSTEM INSTRUCTION MANUAL ...
Page 135: ...CHAPTER 3 INTERFACES SOFTWARE INTERFACE 850 FEEDER PROTECTION SYSTEM INSTRUCTION MANUAL 3 41 ...
Page 151: ...CHAPTER 3 INTERFACES SOFTWARE INTERFACE 850 FEEDER PROTECTION SYSTEM INSTRUCTION MANUAL 3 57 ...
Page 153: ...CHAPTER 3 INTERFACES SOFTWARE INTERFACE 850 FEEDER PROTECTION SYSTEM INSTRUCTION MANUAL 3 59 ...
Page 439: ...CHAPTER 7 MONITORING FUNCTIONS 850 FEEDER PROTECTION SYSTEM INSTRUCTION MANUAL 7 19 ...
Page 644: ...11 20 850 FEEDER PROTECTION SYSTEM INSTRUCTION MANUAL FLEXELEMENTS CHAPTER 11 METERING ...