3$
)NSTALLATION INSTRUCTIONS
6
# ' #
#HECKING THE CONNECTIONS
7ARNING
3OME OF THE FOLLOWING TEST STEPS ARE CARRIED
OUT IN PRESENCE OF HAZARDOUS VOLTAGES
4HEY SHALL BE PERFORMED BY QUALIFIED PER
SONNEL ONLY WHICH IS THOROUGHLY FAMILIAR
WITH ALL SAFETY REGULATIONS AND PRECAUTION
ARY MEASURES AND PAY DUE ATTENTION TO
THEM
.ONOBSERVANCE CAN RESULT IN SEVERE PER
SONAL INJURY
"EFORE INITIAL ENERGIZATION WITH SUPPLY VOLTAGE THE
RELAY SHALL BE SITUATED IN THE OPERATING AREA FOR AT
LEAST TWO HOURS IN ORDER TO ENSURE TEMPERATURE
EQUALIZATION AND TO AVOID HUMIDITY INFLUENCES AND
CONDENSATION
3WITCH OFF THE CIRCUIT BREAKERS FOR THE DC SUPPLY
#HECK THE CONTINUITY OF ALL THE CURRENT TRANSFORMER
CIRCUITS AGAINST THE PLANT AND CONNECTION DIA
GRAMS
C
!RE THE CURRENT TRANSFORMERS CORRECTLY EARTHED
C
!RE THE POLARITIES OF THE CURRENT TRANSFORMER
CONNECTIONS CONSISTENT
C
)S THE PHASE RELATIONSHIP OF THE CURRENT TRANS
FORMERS CORRECT AND EQUAL AT ALL LINE ENDS
C
)S THE ASSIGNMENT OF THE CURRENT TRANSFORMERS TO
THE INPUT WINDINGS OF THE SUMMATION CURRENT
TRANSFORMER CORRECT
)F TEST SWITCHES HAVE BEEN FITTED IN THE SECONDARY
CIRCUITS CHECK THEIR FUNCTION PARTICULARLY THAT IN
THE TEST POSITION THE CURRENT TRANSFORMER SEC
ONDARY CIRCUITS ARE AUTOMATICALLY SHORTCIRCUITED
%NSURE THAT THE MINIATURE SLIDE SWITCH ON THE FRONT
PLATE IS IN THE /&&
e
w
POSITION REFER TO &IGURE
&IT A DC AMMETER IN THE AUXILIARY POWER CIRCUIT
RANGE APPROX ! TO !
#LOSE THE BATTERY SUPPLY CIRCUIT BREAKER CHECK
POLARITY AND MAGNITUDE OF VOLTAGE AT THE TERMINALS
OF THE UNIT OR AT THE CONNECTOR MODULE
4HE MEASURED CURRENT CONSUMPTION SHOULD COR
RESPOND TO APPROXIMATELY 7 4RANSIENT MOVE
MENT OF THE AMMETER POINTER ONLY INDICATES THE
CHARGING CURRENT OF THE STORAGE CAPACITORS
4HE UNIT STARTS UP AND ON COMPLETION OF THE RUN
UP PERIOD THE GREEN ,%$ ON THE FRONT COMES ON
THE RED ,%$ GETS OFF AFTER AT LAST SEC
/PEN THE CIRCUIT BREAKER FOR THE DC POWER SUPPLY
2EMOVE DC AMMETER RECONNECT THE AUXILIARY
VOLTAGE LEADS
#HECK THROUGH THE TRIPPING CIRCUITS TO THE CIRCUIT
BREAKERS
#HECK THROUGH THE CONTROL WIRING TO AND FROM OTH
ER DEVICES
#HECK THROUGH THE PILOT WIRE CONNECTIONS &OR
REASONS OF SYMMETRY THE PILOT WIRES ARE CROSSED
OVER IN THE CONNECTION DIAGRAMS 4HE POLARITY
CHANGERS SWITCHES IN THE FRONT PLATE SEE ALSO &IG
URE HAVE THEN EQUAL POSITION AT BOTH LINE ENDS
PROVIDED THE CURRENT TRANSFORMERS AT BOTH LINE
ENDS HAVE EQUAL POLARITY )T IS PERMISSIBLE
AS IT
WAS WITH CONVENTIONAL DIFFERENTIAL RELAYS
TO CON
NECT THE PILOT WIRES IE TO CONNECT THE TERMI
NALS WITH EQUAL TERMINAL NUMBER AT BOTH ENDS )N
THIS CASE THE POLARITY CHANGERS AT BOTH ENDS MUST
HAVE DIFFERENT POSITION 4HE CORRECT ALLOCATION OF
THE PILOT WIRES IS RECHECKED DURING COMMISSION
ING OF THE PROTECTION SYSTEM REFER TO 3ECTION
&OR LINES WITH THREE TERMINALS TEED LINES THE PO
LARITY CHANGERS OF THE TWO ADJACENT RELAYS IN THE
SAME SUBSTATION MUST BE IN THE SAME POSITION
&URTHERMORE THE CORRECT POLARITY OF THE PILOT WIRES
TO THE THIRD LINE END OF EACH RELAY MUST BE CHECKED
CONNECTION EXAMPLE IN !PPENDIX "
&OR LINES WITH THREE TERMINALS TEED LINES WHEN PI
LOT WIRE MONITORING IS USED ENSURE THAT IN TWO OF
THE THREE STATIONS CONNECTION IS MADE BETWEEN
THE SIGNAL OUTPUT
"LOCK TO END
&.O
OF EACH RELAY TO THE BINARY INPUT
07-
END
&.O
OF THE OTHER 4HIS CONNECTION
MUST NOT BE MADE IN THE THIRD STATION %XPLANA
TIONS ARE GIVEN IN 3ECTION
#HECK THE SIGNAL CIRCUITS
2ECLOSE THE PROTECTIVE MCB S
Содержание 7SD502
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