GE MLP1000, Manual

Page 1: ...G GE EK K 98846 98846A A GE Power Management We bring good things to life MLP MLP MICROPROCESSOR BASED DISTANCE PROTECTION Click here to get to our homepage http www gemultilin com ...

Page 2: ...DIRECTION INDICATOR 30 4 11 MLP STATUS 30 4 12 EVENT REGISTER 32 4 13 OSCILLOGRAPHIC REGISTER 33 4 14 FAULT LOCATOR MLP3000 35 4 15 CURRENTS OR VOLTAGE LOG 35 4 16 BREAKER SUPERVISION 36 4 17 SELF CHECKS AND ERROR ROUTINES 37 4 18 OUTPUTS 40 4 19 OPERATIONS 42 4 20 OUT OF STEP BLOCKING UNIT 42 5 COMMUNICATIONS 43 5 1 REMOTE COMMUNICATIONS 43 5 2 SELF CHECKS AND ERROR ROUTINES 43 5 3 RELAY DATA 45 ...

Page 3: ...IMERS 78 6 2 9 ZONE 1 EXTENSION SCHEME 80 6 2 10 ZONE 2 ACCELERATION SCHEME MLP3000 80 6 2 11 LPU FUNCTION 81 6 2 12 ROD FUNCTION MLP3000 81 6 2 13 DD FUNCTION MLP3000 82 6 2 14 FF FUNCTION MLP3000 82 6 2 15 TRIP BLOCKS Settings and Input 82 6 2 16 DIRECTION INDICATORS 83 6 2 17 OPERATIONS 83 6 2 18 BREAKER SUPERVISION 83 6 2 19 RECLOSER MLP2000 and MLP3000 84 6 2 20 CONFIGURABLE OUTPUTS 85 6 2 21...

Page 4: ...s and modem for connection to MLP and or MOR MTP y MCP systems linked to the substation distribution lines The information provided herein does not intend to cover all details of variations of the described equipment nor does it take into account the circumstances that be present in your installation operating or maintenance activities Should you wish to receive additional information or for any p...

Page 5: ...will not be lost Measuring and monitoring of the current and voltage of the three phases and the current of the zero sequence unit On line monitoring of the breaker status distance protection and recloser Hourly register of the maximum load current or power selectable capable of storing information accumulated over seven days A phase direction indicator that indicates if the line current is in the...

Page 6: ...fault cycles The information generated by the fault selector type of fault and it s location and the type of trip performed will be stored Data can be retrieved and saved in an ASCII file The MLP system protection and resetting operations are independent from control and communications operations so that a highly reliable protection operation can be ensured even in the case the rest of the compone...

Page 7: ...y as a directional line relay it can also be used with relatively long lines where it is necessary to reinstall the service automatically The MLP3000 is the most sophisticated of the three models and includes a remote open detector a fuse failure detector and a fault locator In additionally it contains an OSCILLOPERTURGRAFIC function and the possibility to be used with accelerated trip schemes in ...

Page 8: ... test block optional 1 With test block standard 1 In 1A 5 In 5A Communications 1 Keyboard and RS232 2 Keyboard and 1mm plastic F O 3 Keyboard and 100 140 glass F O 4 Keyboard and 50 125 glass F O Vaux inputs 0 48 VDC 1 125 VDC 2 220 VDC G Vaux 48 125 VDC H Vaux 110 250 VDC A Revision Level The MLP relays are structured in three different families which include each of the features listed below MLP...

Page 9: ...HNICAL SPECIFICATIONS Rated Current In 1 A or 5 A Rated Voltage Vn 110 13 20 VAC at 50 Hz 120 13 20 VAC at 60 Hz Frequency 50 Hz or 60 Hz switchable Auxiliary Power 48 125 20 VDC 110 250 20 VDC Auxiliary Voltage Inputs 48 20 VDC 125 20 VDC 220 20 VDC Thermal capacity Current Circuits Continuous 4 x In During 3 sec 50 x In During 1 sec 100 x In Voltage Circuits Continuous 2 x Vn During 1 min 3 5 x ...

Page 10: ...sistive with 8 A maximum or 380 VAC or 250 VDC maximum Connection Time 12 ms approx Release Time 10 ms approx Communications Plastic Fiber Optics 1 mm Typical emitted power 8 dBm Receiver sensitivity 39 dBm Numerical aperture N A 0 5 Wave Length 660 nm visible red Crystal Fiber Optics 100 140 Typical emitted power 11 5 dBm Receiver sensitivity 25 4 dBm Numerical aperture N A 0 3 Wave length 820 nm...

Page 11: ...eration values 5 Operation time 5 or 30 ms whichever is greater Number of zones Three zones I II and III and one dependent on zone I extended zone I Operating characteristics Zone I extended zone I and zone II Ground faults Reactance or variable mho selected by user Fault between phases Variable mho Characteristics angle for the reactance characteristic 70 to 90 in 0 5 steps Reach setting Zone I 0...

Page 12: ...cted RECLOSER SETTING RANGES MLP2000 and MLP 3000 Number of recloses 0 1 2 3 setting 0 disables the recloser Reclosing time From 0 2 to 99s in 0 01s steps Closing time From 0 1 to 99 s in 0 01 s steps Reset time From 0 1 to 99 s in 0 01 s steps Delay time From 0 1 to 99s in 0 01 s steps OSCILLOGRAPHIC REGISTER MLP3000 and MLP4000 Number of oscillograms 7 Number of cycles per oscillo 240 DIMENSIONS...

Page 13: ...I and 4000 n steps of 1 103 PT RATIO Variable between I and 4000 in steps of 1 104 RECORD TYPE Select between current log or power log see 4 15 105 SYSTEM FREQUENCY Select between 50 Hz or 60 Hz depending on system to be protected 106 ALLOW RECLOSER INHIBITION INPUT IN_R MLP2000 and MLP3000 Enable or disable 107 ALLOW EXTENDED Z1 PULL BACK INPUT RZ1X Enable or disable 108 ALLOW CARRIER RECEIVER IN...

Page 14: ...m an alarm is triggered See 4 6 Protection Settings 201 OUT OF STEP BLOCKING OSB IN SERVICE Enable Disable fine pick out function 202 LINE PICK UP LPU IN SERVICE Enable Disable fine pick up function 203 REMOTE OPEN DETECTOR ROD IN SERVICE MLP3000 Enable Disable remote open detector function 204 FUSE FAILURE FF IN SERVICE Enable Disable fuse failure function 205 ALLOW RECLOSES AFTER A TRIP IN ZONE ...

Page 15: ...e or disable 212 GENERAL TRIP AUTHORIZATION Even though certain types of trips are allowed if the general trip authorization is disabled all trips remain disabled 213 ALLOW ZONE 3 TRIPS Enable or disable 214 ALLOW ZONE 2 TRIPS Enable or disable 215 ALLOW ZONE I TRIPS Enable or disable 216 LPU TIMER FUNCTION Even though the setting is variable between 0 and 150 ms in 1 ms steps for design reasons i...

Page 16: ...e positive sequence impedance module in 0 01 Ohm steps ZOL KO ZIL 222 ZERO SEQUENCE ANGLE OF MAXIMUM REACH Variable between 40 and 90 in 0 5 steps 223 ZONE 1 REACH Variable between 0 01 and 12x5 In Ohms in 0 001 steps 224 EXTENDED ZONE 1 REACH Variable between 1 and 2 times Zone 1 reach in 0 01 Ohm steps 225 ZONE 2 REACH Variable between 0 04 and 50x5 In Ohms in 0 001 Ohms steps 226 ZONE 3 REACH V...

Page 17: ...rrent supervision 232 LPU OVERCURRENT THRESHOLD IØld Above this threshold adjustable between 0 15 and 3 00 times the rated current in 0 01 steps the LPU operates when engaged typically set to 3 00 See 4 5 Recloser settings 301 NUMBER OF RECLOSING ATTEMPTS MLP2000 and MLP3000 The number of reclosing attempts can be programmed up to a maximum of three If the number of attempts is set to 0 the reclos...

Page 18: ...s Zone 1 trip Extended Zone 1 trip Zone 2 trip Extended Zone 2 trip Accelerated Zone 2 trip Zone 3 trip ROD trip LPU trip Manual trip order Manual trip closing order Breaker open Breaker close Failure opening the breaker No closing conditions Failure closing the breaker Permanent fault Recloser manually blocked Recloser manually unlocked Fault cleared Reclosing initiation Disable 2 B input Disable...

Page 19: ...6 ALLOW RECLOSER INHIBITION INPUT IN_R MLP2000 AND MLP3000 You may not disable this setting if the setting 302 RECLOSING WAIT CONDlTIONS has been set to YES 108 ALLOW CARRIER RECEIVER INPUT RC TR MLP1000 You may not disable this setting if the setting 208 PROTECTIONS SCHEME has been set to zone II acceleration 114 AMPS ACCUMULATED IN BREAKER OPENINGS You may not set this setting to value greater t...

Page 20: ...aker by doing so reclosing procedures cannot be performed since the recloser the recloser will be blocked at the end of a reclosing time and the breaker will be closed instead of open 308 RESET TIME All models When the setting 208 PROTECTION SCHEME has been set too ZONE I EXTENSION you may not set this timer to a value less than that set for 229 ZONE II TRIP TIMER 4 PRINCIPLES OF OPERATION 4 1 INP...

Page 21: ...ted line supply a secondary phase ground voltage which is applied to the relay input and reduced by internal voltage transformers whose secondary voltages provide input voltage to the protection system The current transformers of the protected circuit supply a secondary current of up to 160 A which is applied to the relay input and reduced by the internal power transformers The secondary currents ...

Page 22: ...AB BC CA The measuring units operating characteristics are Phase ground faults Reactance or MHO variable switchable in zones land 2 MHO variable in Zone 3 that supervises reactance operations when selected Phase phase faults MHO variable in the three zones The operation and polarization quantities used in the reactance units for ground phase faults in zones 1 and 2 are Fault Quantity Operation Pol...

Page 23: ...ositive sequence voltage related to a given pair of phases Operation and Polarization quantity comparisons The operating condition for the circular mho characteristics and minimum reactance plane characteristics is based on the difference between the operating quantity and the polarization quantity between 90 and 90 90 ANG Mag_Op ANG Mag_Pol 90 The fault condition for the minimum reactance charact...

Page 24: ...tive voltage transformers which tend to produce overreaches This algorithm generally avoids overreaches for fault that are close to the limit of the first zone The programmed delay for this algorithm which is exclusively for faults close to the limit of the first zone is 15 ms 4 4 PROTECTION SCHEMES The MLP includes three protection schemes 0 Scaled distance Three line distance protection Zones fo...

Page 25: ...e 3 reach zone 1 distance measuring units will not detect the fault ho ever zone 3 distance measuring units will detect the fault After activating the DMUZ3 ACTIVE signal the protection is activated and the zone 2 and zone 3 timers are started The zone 2 timer will be the first to finishing counting and will deactivate the zone 1 distance measuring units and activate those of zone 2 At this moment...

Page 26: ...uppose a fault at 95 of the line length with the zone I reach set to 80 of the line length In this case relay A see figure 6 2 will not detect a fault in zone 1 but as relay B will detect a fault in zone 1 it activates the transmission channel therefore when relay A receives the signal through the channel it extends reach in zone 1 zone 2 and detects the fault in zone The transmission time is one ...

Page 27: ...the tripping time plus the time to open the remote breaker plus the ROD timing is greater then the zone 2 timing the local relay will perform a zone 2 trip and not a ROD trip For ROD timing keep in mind that ROD units as well as distance measuring units take 1 cycle to operate This unit does not work for three phase faults since the information to detect that the remote extreme is open reaches the...

Page 28: ...e failure detection 4 9 RECLOSER MLP2000 and MLP3000 The reclosing unit permits up to three reclosing attempts of the line breaker The number of attempts is programmable between 0 and 3 with 0 indicating that the reclosing unit is disabled The recloser includes a counter that increments the count each time it reaches the closing time state The MLP recloser includes a set of digital inputs and outp...

Page 29: ...le The recloser is disabled is this state as if it did not exist None of the outputs will be activated Standby The recloser remains in this state until reclosing initiation is performed None of the outputs will be activated Reclosing time N These are the programmed times N for each of the reclosing times Waits for the programmed reclosing time for the fault to clear before reclosing CC is activate...

Page 30: ...failure you remain in this state Reclosing cycle initiation For the recloser to be in standby the breaker must be closed and a manual reclosing block must not be active Once the initiate reclosing cycle signal is activated caused by the protection or externally the recloser leaves the standby state reclosing time corresponding to the first programmed reclosing starts When the reclosing time ends t...

Page 31: ...n allows you to check that the voltages and currents are properly connected 4 11 MLP STATUS You can request the MLP status which will provide general information about the status of the protection relay model and version actual values modules of the phase voltages phase and zero sequence currents VA VB VC IA IB IC I0 and the date and time The protection status can be requested through the remote c...

Page 32: ...ronism DEFAULT SETTINGS DEFAULT CALIBRATION Relay inputs Recloser inhibition Extended Zone 1 pullback Reclosing block Reclosing initiate Line pick up External trip block Channel reception Selectable relay outputs Measuring units signals Z 1 extended to Z I X Zone 2 activation LPU unit FF unit ROD unit Anv zone 3 distance measuring unit DD unit Any zone 1 distance measuring unit ...

Page 33: ...s of the 12 distance measuring units Z 1 Z2 and Z3 Up to 240 events are stored new events above this number overwrite the least recent events The events can be requested by dates Events can only be deleted via serial communication never through the relay keyboard Events are stored in the EEPROM so that they will not be lost in the event of a power supply failure The types of events registered are ...

Page 34: ...re not relevant in certain cases which events must be registered and which events must not can be programmed via an event mask The event masks can be set in the relay settings module Through the MLink program the event log may be stored m a file and can be retrieved afterwards as an input data file for user programs 4 13 OSCILLOGRAPHIC REGISTER The oscillographic register retrieves the seven most ...

Page 35: ...als Permanent fault Failure closing the breaker No closing conditions fault Failure opening the breaker Repetitive tripe Recloser blocked Reclosing cycle in process Fault cleared Digital outputs Transmission start Extended zone 1 pull back Closing of the breaker Reclosing block Reclosing initiate Breaker failure initiate Measuring units Z1 or Z2 measuring units activated ROD trip LPU trip Fuse Fai...

Page 36: ...scillographic register fault report the location in the line where the fault has been produced and also what type of fault it is Phase selectors are used to determine the type of fault These selectors are independent from the measuring units Once the measuring units have detected a fault in any of the zones protected by the relay and the protection has tripped the phase selectors determine the typ...

Page 37: ...lculated P 3 Vx Ix Vy Iy 3 lVl lIl cos 90 α Q 3 Vx Iy Vy Ix 3 lVl lIl sin 90 α where P Active power Q Reactive power Vx Vy Real or imaginary components of the voltage corresponding to phase A Ix Iy Real or imaginary components of the current corresponding to phase A 4 16 BREAKER SUPERVISION The breakers require maintenance depending on how often they are opened and with what current during certain...

Page 38: ... the READY LED on the front panel of the relay is switched off and an error message is displayed on the monitor If a critical error is detected during the time when communications and protection operations are idle the system is reset If the critical error is detected during the reset initiation the protection will enter into the infinite program loop described above Description of failures Critic...

Page 39: ...d This will activate the DEFAULT SETTINGS signal the alarm contact and the out of service LED on the front panel of the relay These alarms remain active until the user reenters the correct settings The following list indicates the default settings for the relay 001 IDENTIFICATION MLP GENERAL ELECTRIC 002 BREAKER NUMBER 1234 101 LINE DISTANCE 100 km 102 CT RATIO 1 103 PT RATIO 1 104 RECORD TYPE C 1...

Page 40: ...2 GENERAL TRIP AUTHORIZATION NO 213 ALLOW ZONE III TRIPS NO 214 ALLOW ZONE II TRIPS NO 215 ALLOW ZONE I TRIPS NO 216 LPU TIMER FUNCTION 128 ms 217 FF TIMER FUNCTION 60 ms 218 ROD TIMER FUNCTION 0 ms 219 POSITIVE SEQUENCE LINE IMPEDANCE MODULE 6Ω 220 POSITIVE SEQUENCE ANGLE OF MAXIMUM REACH 85º 221 ZERO SEQUENCE CURRENT COMPENSATION 3 222 ZERO SEQUENCE ANGLE MAXIMUM REACH 75º 223 ZONE I REACH 4 8Ω ...

Page 41: ... send it back to the factory so that it can be recalibrated using the default calibration settings is acceptable as long as the default calibration setting is maintained below 5 error However it is not advisable to postpone the recalibration longer than absolutely necessary Cold warm boot Any system reset causes a cold boot During this boot the self checks are performed If no critical errors are d...

Page 42: ...BG DMUZ I CG DMUZ IAB DMUZ I BC DMUZ 1 CA DMUZ3AG DMUZ3BG DMUZ3CG DMUZ3AB DMUZ3BC DMUZ3CA Any ground measuring unit DMUZ 1AG DMUZ 1 BG DMUZ 1 CG DMUZ3AG DMUZ3BG DMUZ3CG Any Z1 ground measuring unit DMUZ1AG DMUZ1BG DMUZ1CG Any Z3 ground measuring unit DMUZ3AG DMUZ3BG DMUZ3CG Any phase measuring unit DMUZ1AB DMUZlBC DMUZ1CA DMUZ3AB DMUZ3AB DMUZ3BC DMUZ3CA Any zone 1 phase measuring unit DMUZ 1AB DMU...

Page 43: ...ters into the tripping zone This speed allows us to identify a phase power oscillation fault situation Figure 17 illustrates the state diagram for this functions as well as the X J plane characteristic To better understand this we will explain the operation with an example In a fault situation the impedance crosses the OSB zone in tomato form and stars the oscillation detection timer TL3 When this...

Page 44: ...cable see figure 1 MLP PC 1 o o 3 2 o o 2 3 o o 7 The MLP uses serial communications only for interfacing with external units in such a way that you can only set and request data in this mode Needless to say if for any reason communications are cut the MLP continues protecting the fine and stores data in it s memory for transmission once communications have been reestablished The protection functi...

Page 45: ...MLP applies a WATCHDOG in the form of an intrinsic hardware monitoring system to assure total reliability of the system In the event of a non critical functional indication in the MLP status the following warnings are displayed Current passing with breaker open Protection has been initialized but has not received a synchronize command indicating WITHOUT CLOCK The breaker require maintenance for ex...

Page 46: ...surement unit CA in zone 1 Indication of the activation of measurement unit AG in zone 3 Indication of the activation of measurement unit BG in zone 3 Indication of the activation of measurement unit CG in zone 3 Indication of the activation of measurement unit AB in zone 3 Indication of the activation of measurement unit BC in zone 3 Indication of the activation of measurement unit CA in zone 3 I...

Page 47: ...e date and time will start at the default setting of 01 01 88 00 00 00 Using the Mlink program the current log can be saved to a file and later used as an input data file for application programs executed by the user 5 3 3 MLP STATUS Requesting the status from the MLP provides you with general information regarding the breaker status the recloser and it s possible blocks and the communications sta...

Page 48: ...en is displayed MLP GENERAL ELECTRIC The screen changes rapidly displaying the last fault stored by the protection TRP AG Z1 27 13APR 13 07 0050 This message with TRP when relay tripping is disabled not blinking indicates the relay has been initialized This message only appears in this case maintaining itself in the standby mode Pressing the CLR key will return you to the standby screen MLP GENERA...

Page 49: ...ing groups Information INF provides data related to the relay status current or power logs and event logs Operations ACT open and close the breaker block and unblock the recloser Settings SET View and modify the settings Single key operations ENT Configuration 7169 set the external communications parameters as well as enable other functions General rules covering the use of the user keyboard and m...

Page 50: ...h group 5 4 2 INFORMATION GROUP This group provides information related to the MLP To access this option press the INF key when the MLP is in standby When entering the information menu the first group of information elements will be displayed EVENT LOGS By pressing the keys the following groups will appear on the screen EVENT LOGS CURRENT LOGS POWER LOGS MLP STATUS pressing displays CURRENT LOGS p...

Page 51: ...ou need to remote communication After this appears on the monitor the most recent event will be displayed with its corresponding date and time day month hour minute second hundreds for example E_TRIP Z1X 01DEC 07 50 2590 The key advances the display through older events while the key advances the display through newer events The events are organized in a circular way If you press the key when view...

Page 52: ... LOGS until retrieving 168 logs which is the maximum capacity of the relay logs Once all of the logs have been loaded into memory the most recent log will be displayed on the monitor For example 3 43 A 01DEC 07 50 2590 In the case of currents as in this case there is only one screen displayed for the log In the case of powers the following will be displayed 40 90W 01DEC 07 50 2590 This screen disp...

Page 53: ...you press the key when viewing the most recent event the next event in line will be the oldest 5 4 5 STATUS Starting from the screen MLP STATUS Pressing ENT will display the name of the first status element MODEL To view the values associated with this item pressing ENT will display in the example of MODEL MODEL MLP V1 0 MLP3152M010G00A indicating the model and version of the relay To access anoth...

Page 54: ...yboard program requires confirmation for each operation To confirm the operation press the 1 Y key Pressing the 3 N key will abort the operation Pressing the CLR key at this screen is equivalent to pressing the 3 N key If you confirm the operation the result of the operation will be displayed on the screen Using either the ENT or the CLR keys will acknowledge the message and return you to the oper...

Page 55: ... keys will advance you to the following option MODIFY SETTINGS which will be covered in the next section To access these options pressing ENT while VIEW SETTINGS is displayed on the monitor will display GENERAL SETTINGS Pressing the keys will display the following groups GENERAL SETTINGS PROTECTION SETTINGS RECLOSER SETTINGS EVENT MASKS The way of viewing any one of the groups such as modify setti...

Page 56: ...es of values is initialized etc Due to this the line which the relay protects will be momentarily unprotected This lasts 5 milliseconds ONE FOURTH OF THE NETWORK CYCLE To avoid losing the settings in the event of a power loss they are duplicated in non volatile EEPROM memory Returning to the system keyboard starting from the screen GENERAL SETTINGS pressing ENT displays LINE LENGTH KM 73 93 This s...

Page 57: ...rent with others Pressing any key will return you to the initial menu for changing this setting If the newly desired setting is 22 after pressing ENT the setting is accepted and the following is momentarily displayed LINE LENGTH KM 73 93 22 00 You can update this setting in the relay or modify one or more settings for a definitive change at a later time As an example change another setting using t...

Page 58: ...EYBOARD Some settings have been excluded from the keyboard due to various incompatibilities with the keyboard monitor system They are Date and time may be viewed but not modified To avoid the loss of substation relay synchronism the date and time may only be changed through remote communications Breaker identification and number may be viewed but not modified Given the fact that the MLP has only a...

Page 59: ...R UNLOCKED RECLOSER RECLOSE NUMBER RESET RECLOSE NUMBER BREAKER STATUS FAULT TYPE TRIP TYPE FAULT LENGTH AND DATE TIME OF THE LAST FAULT 5 4 11 CONFIGURATION UNIT The MLP contains a configuration unit which can be accessed exclusively through the keyboard it is used to select how the MLP will interact with the exterior The configuration unit is entered from the standby screen by entering a four di...

Page 60: ...h K length values displayed in kilometer I unit number A detailed explanation for each of the settings is as follows Speed The baud rate which the MLP uses to communicate serially with the remote controller The possible values for this setting are between 300 and 19 200 baud optic fiber and 9 600 baud to RS232 Stop bits The number of bits added to each byte transmitted across the serial line It is...

Page 61: ... that these authorizations can only be set from the keyboard this provides you a method of filtering commands which can be executed from the remote controller Language The MLP can display it s messages in two languages Spanish and English To program the language use the logical keys with E meaning English using the 1 Y key and S meaning Spanish using the 3 N key Units of measurement Units of measu...

Page 62: ...ion rate is low 300 600 baud and will be practically invisible at high transmission rates above 2400 baud When the user establishes serial communications with the relay a blinking R will appear on the left of the first line on the relay display This is to notify a local user that any keypad action will disconnect the remote communications session If the unit number or transmission rate parameters ...

Page 63: ...nsors are used to simulate closing exterior contacts Combinations of resistance and voltmeters are used to observe the active signals across the auxiliary relays in the following form Relay deenergized Contact open Relay energized Contact closed Connect the relay in accordance with the scheme in figure 16 6 2 1 INITIAL CONFIGURATION Apply power to the relay and using the keyboard enter the passwor...

Page 64: ...END MLP GENERAL ELECTRIC without ENT Ia 0 00 A Va 0 00 V CLR or END MLP GENERAL ELECTRIC without 7169 SETTINGS CONFIG 2400 lNBMASK l CLR MLP GENERAL ELECTRIC Adjust the relay to the following settings Note Some settings only apply to model MLP2000 and MLP3000 000 General Settings 001 IDENTIFICATION 002 BREAKER NUMBER 101 LINE LENGTH 100 102 ASSOCIATED ED CT RATIO 1 103 ASSOCIATED PT RATIO 1 104 RE...

Page 65: ...RVICE NO 210 TRIPS CAUSED BY ROD ROD TRIP YES 211 TRIPS CAUSED BY LPU LPU TRIP YES 212 GENERAL TRIP YES 213 Z3 TRIP YES 214 Z2 TRIP YES 215 Z1 TRIP YES 216 LPU TIMER 128 217 OSB TIMER 60 218 ROD TIMER 0 219 POSITIVE SEQUENCE IMPEDANCE ZL1 IMPED 6 0 220 POSITIVE SEQUENCE ANGLE ZL1 ANGLE 85 221 ZERO SEQUENCE CURRENT COMPENSATION K0 3 0 222 ZERO SEQUENCE ANGLE ZL0 ANGLE 75 223 Z 1 REACH 4 80 224 Z1X ...

Page 66: ... the ZIX pull back are activated Once the input deactivates the SC7 and SC5 outputs should deactivate CC2 Trip Block With the input inactive momentarily apply the voltages and currents indicated by the AG00 fault see fault list and check that the relay trips correctly With the input active follow the same procedure and check that this time the relay does not trip CC3 Energizing the line With the L...

Page 67: ...celerated Z2 trip must be faster than a Z2 trip MLP3000 CC7 Z1X pull back With the breaker closed CC 1 without power the zone 1 extension scheme selected PROTEC SCHEME 0 EX Z1 and CC7 without power momentarily apply the currents and voltages indicated by the AG99 fault checking that the relay trips in Z I and recloses Check that the last events generated were TRIP IN Z1X BREAKER OPENED BREAKER CLO...

Page 68: ... 10 00 In 9 50 10 50 In V Vol Acceptable Range 0 70 0 66 0 73 3 50 3 32 3 67 7 00 6 65 7 35 14 00 13 30 14 70 35 00 33 2 36 75 70 00 66 50 73 50 6 2 4 SINGLE PHASE MEASUREMENT UNIT S REACH FOR THE MHO CHARACTERISTIC The magnitudes used in the mho units for ground faults are Fault Quantity Operation Polarization Qty ØG I Øx Zr Vøn VØ1m Where I Øx Zr IØ I0 x Zr Θ1 K0 x I0 x Zr Θ0 IØ x Zr Θ1 I0 x K0 ...

Page 69: ...AG BG CG PHASE TO GROUND MEASUREMENT UNIT REACH Change the settings 213 Z3 TRIP NO 214 Z2 TRIP NO 215 Z1 TRIP YES 226 Z2 REACH 2 00 1 Apply the following voltages to the relay through the rear terminals A2 A3 A4 A5 A6 A7 VA A2 A3 67 0 VB A4 A5 67 120 VC A6 A7 67 240 2 Adjust the fault current argument in accordance with table MHOZ1ØG 5IN or table MHOZ1ØG 1 IN according to the rated current it is l...

Page 70: ...ttings 212 Z3 TRIP NO 213 Z2 TRIP YES 214 Z 1 TRIP YES 224 Z2 REACH 9 00 1 Apply the following voltages to the relay through the rear terminals A2 A3 A4 A5 A6 A7 THE ANGLES ARE LAGGING VA A2 A3 67 0 VB A4 A5 67 120 VC A6 A7 67 240 2 Adjust the fault current argument in accordance with table MHOZ2ØG 5IN or table MHOZ2ØG 1IN according to the rated current it is left to the user s discretion to selec...

Page 71: ... TRIP YES 1 Apply the following voltages to the relay through the rear terminals A2 A3 A4 A5 A6 A7 THE ANGLES ARE LAGGING VA A2 A3 67 0 VB A4 A5 67 120 VC A6 A7 67 240 2 Adjust the fault current argument in accordance with table MHOZ3ØG 5IN or table MHOZ3ØG 1IN according to the rated current it is left to the user s discretion to select the characteristic point s to check 3 Set the fault current I...

Page 72: ... 1 and 2 are Fault Operation Magnitude Polarization Magnitude ØG I Øx Zr Vøn I2 x Xr Where I Øx Zr IØ I0 x Zr Θ1 K0 x I0 x Zr Θ0 IØ x Zr Θ1 I0 x K0 x Zr Θ0 Zr Θ1 Zr Adjusted impedance reach Xr Relay reactive impedance VØn Ground phase voltage IØ Phase current I0 Zero sequence current Θ1 Positive sequence line impedance angle Θ0 Zero sequence line impedance angle K0 Zero sequence compensation const...

Page 73: ... 67 0 VB A4 A5 67 120 VC A6 A7 67 240 2 Adjust the fault current argument in accordance with table REACTZ1ØG 5IN or table REACTZ1ØG 1IN according to the rated current it is left to the user s discretion to select the characteristic point s to check 3 Set the fault current IA IB or IC according to the phase in fault to 5 A for IN 5 and 2 A for IN 1 and the rest of the currents to zero 4 Reduce the ...

Page 74: ...00 1 Apply the following voltages to the relay through the rear terminals A2 A3 A4 A5 A6 A7 THE ANGLES ARE LAGGING VA A2 A3 67 0 VB A4 A5 67 120 VC A6 A7 67 240 2 Adjust the fault current argument in accordance with table REACTZ2ØG 5IN or table REACTZ2ØG 1IN according to the rated current it is left to the user s discretion to select the characteristic point s to check 3 Set the fault current IA I...

Page 75: ...ation Quantity Polarization Quantity ØØ IØ IØ x Zr VØ VØ VØ1m VØ1m Where Zr Adjusted impedance reach VØn Ground phase voltage VØ1m Negative sequence voltage with memory referenced to the Ø phase IØ Phase current Θ1 Positive sequence line impedance angle Set the following protection settings 201 OSB IN SERVICE NO 202 LPU IN SERVICE NO 203 ROD IN SERVICE NO 204 FF IN SERVICE NO 207 MHO REACT MHO 208...

Page 76: ... must be 180º 3 Set the fault current IA IB or IC according to the phase in fault to 10 A for IN 5 and 2 A for IN 1 and the rest of the currents to zero 4 Simultaneously reduce the voltage of both phases gradually and check that the relay trips when the voltage is within the limits listed in tables MHOZ1ØØ 5IN or MHOZ1ØØ 1IN 5 Reduce the fault currents to zero 6 Repeat the tests for faults between...

Page 77: ...e fault current IA IB or IC according to the phase in fault to 6 7 A for IN 5 and 2 A for IN 1 and the rest of the currents to zero 4 Simultaneously reduce the voltage of both phases gradually and check that the relay trips when the voltage is within the limits listed in tables MHOZ1ØØ 5IN or MHOZ1ØØ 1IN 5 Reduce the fault currents to zero 6 Repeat the tests for faults between phases BG and CG α d...

Page 78: ...trips when the voltage is within the limits listed in tables MHOZ3ØØ 5IN or MHOZ3ØØ 1IN 5 Reduce the fault currents to zero 6 Repeat the tests for faults between phases BG and CG α degrees that V leads I α MHOZ3ØØ 5IN In 5A MHOZ3ØØ 1IN In 1A Voltage Acceptable Range Voltage Acceptable Range 25 0 60 00 56 86 62 85 24 00 22 66 25 05 35 0 65 10 61 70 68 19 26 04 24 59 27 18 45 0 68 23 64 66 71 47 27 ...

Page 79: ...ault list for a period of less than ls and check that first the trip contacts C5 C6 C7 C8 are closed followed by the close or reclosing contacts C9 C 10 C 11 C 12 6 2 8 PHASE SELECTORS FAULT LOCATOR MLP3000 AND THE ZONE TIMERS Set the following protection settings 207 MHO REACT MHO 208 PROTEC SCHEME 0 D E 209 PROT IN SERVICE YES 213 Z3 TRIP YES 214 Z2 TRIP YES 215 Zl TRIP YES 219 POSITIVE SEQUENCE...

Page 80: ...t locate the fault between 45 and 55 km in the faults BC0 BC25 and BC50 the relay trips in zone 1 in the BC75 fault the relay trips in zone 2 and in the BC99 fault the relay taps in zone 3 the trip time in zone 1 is less than 50 ms the trip time in zone 2 is greater than 100 ms and less than 150 ms the trip time in zone 3 is greater than 200 ms and less than 250 ms ms 6 2 8 3 BCG FAULTS Apply the ...

Page 81: ...omentarily apply the currents and voltages indicated by the AG99 fault checking that the relay trips in zone 1 and recloses Check that the last events generated were TRIP IN Z 1X BREAKER OPENED BREAKER CLOSED and FAULT CLEARED With Z1X pulled back power applied to CC7 repeat the same operation and check that the relay trips in zone 2 and that the last events generated were TRIP IN Z2 BREAKER OPENE...

Page 82: ...imes the rated voltage of the relay Ensure that tripping by LPU is permitted and that the MLP sees the breaker open for this use the latching relay which simulates the breaker in position 0 To check the LPU function there are 2 tests In the first test the CC 3 input contact LPU input is activated and check that the LPU trips the relay This is checked by observing the trip contacts and the trip mes...

Page 83: ... setting 204 FF IN SERVICE YES Apply the voltages and currents corresponding to a balanced system with the voltages to the rated voltage 67V and ensure View the FF status in the Relay status menu and check that when the voltage falls in any of the three phases the FF activates and recuperates when the voltage returns 6 2 15 TRIP BLOCKS Settings and Input Set the following protection settings 208 P...

Page 84: ... and current of phase A until the phase A current is not in the trip address Check that the lag between IA and VA is 90Ø ñ 5Ø Perform the same tests for phases B and C 6 2 17 OPERATIONS Set the latching relay which simulates a breaker to position 0 indicating that the breaker is closed Put the recloser in service Perform the block recloser operation and check in the relay status that the recloser ...

Page 85: ...from the STANDBY state to the IN PROGRESS state and finally remains BLOCKED Check that this has generated in this order the following events TRIP IN Z1 BREAKER OPENED and NO CLOSING CONDITIONS 3 With the breaker closed and the recloser in standby disconnect the trip output and the latching relay Apply the AG00 fault that the same occurs as in the previous case except the events generated should be...

Page 86: ... and MLP4000 in which there is no recloser the way for activating SC 5 out put is activating CC 7 contact converter input SC 6 CYCLE IN PROGRESS RECLOSER Set the number of reclosing attempts to l apply the voltages and currents of the AG00 fault for l second and check that after activating the trip output and until the close output is deactivated the corresponding output is activated MLP2000 and M...

Page 87: ...15 ALLOW ZONE 1 TRIPS YES 217 FF TIMER FUNCTION 100 ms 219 POSITIVE SEQUENCE LINE IMPEDANCE MODULE 6Ω 220 POSITIVE SEQUENCE ANGLE OF MAXIMUM REACH 85 221 ZERO SEQUENCE CURRENT COMPENSATION 3 222 ZERO SEQUENCE ANGLE OF MAXIMUM REACH 75 223 ZONE 1 REACH 4 8Ω 224 EXTENDED ZONE I REACH 1 4 225 ZONE 2 REACH 9Ω 226 ZONE 3 REACH 12Ω 228 ZONE 1 TRIP TIMER 0 ms 229 ZONE 2 TRIP TIMER 100ms 230 ZONE 3 TRIP T...

Page 88: ...exterior of the comb The test combs are coded so they cannot be accidentally exchanged The test combs are equipped with a sliding handle to allow wiring to the terminals The terminals are screw type on flat contact boards The handles include a overhanging PLANE which permits guiding the wires connected to the terminals Of the external relay connections the ones wired through a test block allowing ...

Page 89: ...rresponding to the current transformer secondaries The short circuit bars are visible through an exterior transparent plastic part The bars make contact before the connection combs interrupt the connection so the current transformers secondaries are never in an open circuit The two test combs can be connected simultaneously When using only one test comb the connection comb can be left on the other...

Page 90: ... carpeted floors and isolating shoes are conducive to the generation of electrostatic discharge currents Where these conditions exist care should be exercised when removing and handling the modules to make settings on the internal switches The persons handling the module should make sure that their body charge has been discharged by touching some surface at ground potential before touching any of ...

Page 91: ... must be mounted on a vertical surface Figure 2 represents the dimensions and drilling diagram of the MLP The external connection schemes are represented in figure 3 GROUND CONNECTION FOR DISTURBANCE SUPPRESSION The A3 terminal of the relay must be connected to ground so that the disturbance suppression circuits included in the relay may function correctly This connection to ground must be as shor...

Page 92: ...ternal connections MLP2000 Figure 3 8 External connections MLP2000 Figure 3 9 External connections MLP3000 Figure 3 10 External connections MLP3000 Figure 3 11 External connections MLP3000 Figure 3 12 External connections MLP3000 Figure 4 Protection Logic Figure 5 1 Trip decision diagram Figure 5 2 Trip decision diagram Figure 5 3 Trip decision diagram Figure 5 4 Trip decision diagram Figure 6 1 Z...

Page 93: ...0 2 FF function diagram Figure 11 1 Recloser diagram Figure 11 2 Recloser diagram Figure 11 3 Recloser diagram Figure 12 Fault selector Figure 13 Menu tree diagram Figure 14 MLP3000 settings and data Figure 15 Connection scheme for relay tests Figure 16 Figure 17 OSB functions diagram ...

Page 94: ...GEK 98846A 93 Figure 1 System diagram with MLP CPR and TTI ...

Page 95: ...GEK 98846A 94 Figure 2 Case dimensions and drilling form 1 rack ...

Page 96: ...GEK 98846A 95 Figure 3 1 External Connections MLP1000 ...

Page 97: ...GEK 98846A 96 Figure 3 2 External Connections MLP1000 ...

Page 98: ...S RECLOSER LOCK OUT RECLOSER PULL BACK EXTENDED ZONE I ANY MEASURING UNIT M1AG M1BG M1CG M1AB M1BC M1CA M3AG M3BG M3CG M3AB M3BC M3CA ANY GROUND MEASURING UNIT ANY ZONE 1 GROUND MEASURING UNIT ANY ZONE 3 GROUND MEASURING UNIT ANY PHASE MEASURING UNIT ANY ZONE 1 PHASE MEASURING UNIT ANY ZONE 3 PHASE MEASURING UNIT Figure 3 3 External connections MLP1000 ...

Page 99: ...GEK 98846A 98 Figure 3 4 External Connections MLP1000 ...

Page 100: ...GEK 98846A 99 Figure 3 5 External Connections MLP2000 ...

Page 101: ...GEK 98846A 100 Figure 3 6 External Connections MLP2000 ...

Page 102: ...ECLOSE IN PROGRESS RECLOSER LOCK OUT RECLOSER PULL BACK EXTENDED ZONE I ANY MEASURING UNIT M1AG M1BG M1CG M1AB M1BC M1CA M3AG M3BG M3CG M3AB M3BC M3CA ANY GROUND MEASURING UNIT ANY ZONE 1 GROUND MEASURING UNIT ANY ZONE 3 GROUND MEASURING UNIT ANY PHASE MEASURING UNIT ANY ZONE 1 PHASE MEASURING UNIT ANY ZONE 3 PHASE MEASURING UNIT Figure 3 7 External Connections MLP2000 ...

Page 103: ...GEK 98846A 102 Figure 3 8 External Connections MLP2000 ...

Page 104: ...GEK 98846A 103 Figure 3 9 External Connections MLP3000 ...

Page 105: ...GEK 98846A 104 Figure 3 10 External Connections MLP3000 ...

Page 106: ...ESS RECLOSER LOCK OUT RECLOSER PULL BACK EXTENDED ZONE I REMOTE OPEN POLE DETECTOR MEASURING UNIT ANY MEASURING UNIT M1AG M1BG M1CG M1AB M1BC M1CA M3AG M3BG M3CG M3AB M3BC M3CA ANY GROUND MEASURING UNIT ANY ZONE 1 GROUND MEASURING UNIT ANY ZONE 3 GROUND MEASURING UNIT ANY PHASE MEASURING UNIT ANY ZONE 1 PHASE MEASURING UNIT ANY ZONE 3 PHASE MEASURING UNIT Figure 3 11 External Connections MLP3000 ...

Page 107: ...GEK 98846A 106 Figure 3 12 External Connections MLP3000 ...

Page 108: ...GEK 98846A 107 Figure 4 Protection Logic ...

Page 109: ...GEK 98846A 108 Figure 5 1 Trip decision diagram ...

Page 110: ...GEK 98846A 109 Figure 5 2 Trip decision diagram ...

Page 111: ...GEK 98846A 110 Figure 5 3 Trip decision diagram ...

Page 112: ...GEK 98846A 111 Figure 5 4 Trip decision diagram ...

Page 113: ...GEK 98846A 112 Figure 6 1 Z1X protection scheme ...

Page 114: ...GEK 98846A 113 Figure6 2 ACCZ2 Protection scheme ...

Page 115: ...GEK 98846A 114 Figure7 LPU function diagram ...

Page 116: ...GEK 98846A 115 Figure 8 1 ROD function logic ...

Page 117: ...GEK 98846A 116 Figure 8 2 ROD function diagram ...

Page 118: ...GEK 98846A 117 Figure 9 1 DD function logic ...

Page 119: ...GEK 98846A 118 Figure 9 2 DD function diagram ...

Page 120: ...GEK 98846A 119 Figure 10 1 FF function logic ...

Page 121: ...GEK 98846A 120 Figure 10 2 FF function diagram ...

Page 122: ...GEK 98846A 121 Figure 11 1 Recloser diagram ...

Page 123: ...GEK 98846A 122 Figure 11 2 Recloser Diagram ...

Page 124: ...GEK 98846A 123 Figure 11 3 Recloser Diagram ...

Page 125: ...GEK 98846A 124 Figure 12 Fault selector ...

Page 126: ...GEK 98846A 125 Figure 13 Menu Tree Diagram ...

Page 127: ...GEK 98846A 126 Figure 14 MLP3000 Settings and data ...

Page 128: ...GEK 98846A 127 Figure 15 Connection scheme for relay tests ...

Page 129: ...GEK 98846A 128 Figure 16 Power swing diagram function ...

Page 130: ...GEK 98846A 129 Figure 17 Mho Reactance characteristics of the MLP ...

Page 131: ... C D FAULT AT 00 PER UNIT FROM BUS C IS A G GROUND FAULT IMPEDANCE 0000 0 Relay Currents at C I1 5 993 87 4 IA 19 14 88 0 2769 j 5 986 6681 j 19 13 I2 5 993 87 4 IB 1 184 97 9 2769 j 5 986 1627 j 1 173 I0 7 160 89 1 IC 1 184 97 9 1142 j 7 159 1627 j 1 173 Relay voltages at C V1 46 03 3 VA 0000 0 46 03 j 2374 0000 j 0000 V2 20 97 179 4 VB 68 53 123 3 20 97 j 2374 37 58 j 57 31 V0 25 06 178 9 VC 69 ...

Page 132: ...GROUND FAULT IMPEDANCE 0000 0 Relay Currents at C I1 3 808 83 7 IA 11 86 84 1 4170 j 3 785 1 218 j 11 79 I2 3 808 83 7 IB 4411 94 3 4170 j 3 785 3329 E 01 j 4398 I0 4 242 84 8 IC 4411 94 3 3837 j 4 225 3329 E 01 j 4398 Relay voltages at C V1 53 72 1 1 VA 25 75 6 3 53 71 j 9963 25 59 j 2 819 V2 13 33 175 7 VB 67 63 121 2 13 29 j 9963 35 03 j 57 85 V0 14 85 176 8 VC 67 93 121 0 14 82 j 8261 35 03 j ...

Page 133: ...C IS A G GROUND FAULT IMPEDANCE 0000 0 Relay Currents at C I1 2 903 82 8 IA 8 709 82 8 3640 j 2 880 1 092 j 8 640 I2 2 903 82 8 IB 0000 0 3640 j 2 880 0000 j 0000 I0 2 903 82 8 IC 0000 0 3640 j 2 880 0000 j 0000 Relay voltages at C V1 56 89 9 VA 36 75 4 3 56 88 j 9214 36 65 j 2 764 V2 10 16 174 8 VB 67 00 120 0 10 12 j 9214 33 50 j 58 02 V0 10 16 174 8 VC 67 00 120 0 10 12 j 9214 33 50 j 58 02 The...

Page 134: ...T 75 PER UNIT FROM BUS C IS A G GROUND FAULT IMPEDANCE 0000 0 Relay Currents at C I1 2 495 83 5 IA 7 052 82 8 2842 j 2 479 8859 j 6 996 I2 2 495 83 5 IB 4411 85 7 2842 j 2 479 3329 E 01 j 4398 I0 2 063 81 1 IC 4411 85 7 3175 j 2 039 3329 E 01 j 4398 Relay voltages at C V1 58 30 7 VA 42 48 3 0 58 30 j 6914 42 42 j 2 244 V2 8 732 175 5 VB 66 40 118 8 8 705 j 6914 31 97 j 58 19 V0 7 222 173 1 VC 66 1...

Page 135: ... A G GROUND FAULT IMPEDANCE 0000 0 Relay Currents at C I1 2 459 86 5 IA 6 262 84 5 1489 j 2 454 5983 j 6 233 I2 2 459 86 5 IB 1 140 82 4 1489 j 2 454 1517 j 1 130 I0 1 358 77 2 IC 1 140 82 4 3006 j 1 324 1517 j 1 130 Relay voltages at C V1 58 40 2 VA 45 14 1 7 58 40 j 2209 45 13 j 1 331 V2 8 606 178 5 VB 65 72 116 7 8 603 j 2209 29 57 j 58 69 V0 4 754 169 2 VC 64 53 117 3 4 670 j 8896 29 57 j 57 3...

Page 136: ...M BUS C IS B C GROUND FAULT ARC IMPEDANCE 0000 0 Relay Currents at C I1 9 571 88 0 IA 0000 0 3340 j 9 566 0000 j 0000 I2 9 571 92 0 IB 16 58 178 0 3340 j 9 566 16 57 j 5786 I0 0000 0 IC 16 58 82 4 0000 j 0000 16 57 j 5786 Relay voltages at C V1 33 50 0 VA 67 00 0 33 50 j 0000 67 00 j 0000 V2 33 50 0 VB 33 50 180 0 33 50 j 0000 33 50 j 0000 V0 0000 0 VC 33 50 180 0 0000 j 0000 33 50 j 0000 The inpu...

Page 137: ... BUS C IS B C GROUND FAULT ARC IMPEDANCE 0000 0 Relay Currents at C I1 7 053 87 7 IA 0000 0 2785 j 7 047 0000 j 0000 I2 7 053 92 3 IB 12 22 177 7 2785 j 7 047 12 21 j 4824 I0 0000 0 IC 12 22 2 3 0000 j 0000 12 21 j 4824 Relay voltages at C V1 42 32 2 VA 67 00 0 42 32 j 1134 67 00 j 0000 V2 24 68 3 VB 36 99 155 6 24 68 j 1134 33 70 j 15 27 V0 0000 0 VC 36 64 155 4 0000 j 0000 33 30 j 15 27 The inpu...

Page 138: ... BUS C IS B C GROUND FAULT ARC IMPEDANCE 0000 0 Relay Currents at C I1 5 584 87 6 IA 0000 0 2354 j 5 579 0000 j 0000 I2 5 584 92 4 IB 9 671 177 6 2354 j 5 579 9 662 j 4078 I0 0000 0 IC 9 671 2 4 0000 j 0000 9 662 j 4078 Relay voltages at C V1 47 46 2 VA 67 00 0 47 46 j 1421 67 00 j 0000 V2 19 54 4 VB 41 51 144 4 19 54 j 1421 33 75 j 24 18 V0 0000 0 VC 41 11 144 0 0000 j 0000 33 25 j 24 18 The inpu...

Page 139: ... BUS C IS B C GROUND FAULT ARC IMPEDANCE 0000 0 Relay Currents at C I1 4 621 87 5 IA 0000 0 2029 j 4 616 0000 j 0000 I2 4 621 92 5 IB 8 004 177 5 2029 j 4 616 7 996 j 3515 I0 0000 0 IC 8 004 2 5 0000 j 0000 7 996 j 3515 Relay voltages at C V1 50 83 2 VA 67 00 0 50 83 j 1460 67 00 j 0000 V2 16 17 5 VB 45 17 138 4 16 17 j 1460 33 75 j 30 01 V0 0000 0 VC 44 79 137 9 0000 j 0000 33 25 j 30 01 The inpu...

Page 140: ... BUS C IS B C GROUND FAULT ARC IMPEDANCE 0000 0 Relay Currents at C I1 3 965 87 4 IA 0000 0 1789 j 3 961 0000 j 0000 I2 3 965 92 6 IB 6 867 177 4 1789 j 3 961 6 860 j 3098 I0 0000 0 IC 6 867 2 6 0000 j 0000 6 860 j 3098 Relay voltages at C V1 53 12 2 VA 67 00 0 53 12 j 1419 67 00 j 0000 V2 13 88 6 VB 47 90 134 8 13 88 j 1419 33 75 j 33 99 V0 0000 0 VC 47 55 134 4 0000 j 0000 33 25 j 33 99 The inpu...

Page 141: ... BUS C IS B C G GROUND FAULT ARC IMPEDANCE 0000 0 Relay Currents at C I1 9 571 88 0 IA 0000 0 3340 j 9 566 0000 j 0000 I2 9 571 92 0 IB 16 58 178 0 3340 j 9 566 16 57 j 5786 I0 0000 0 IC 16 58 82 4 0000 j 0000 16 57 j 5786 Relay voltages at C V1 33 50 0 VA 67 00 0 33 50 j 0000 67 00 j 0000 V2 33 50 0 VB 33 50 180 0 33 50 j 0000 33 50 j 0000 V0 0000 0 VC 33 50 180 0 0000 j 0000 33 50 j 0000 The inp...