/PERATING INSTRUCTIONS
6%
6
# ' #
)N THE CASE OF BUS BAR VOLTAGE TRANSFORMERS CHECK
THE VOLTAGE APPLIED TO THE DEVICE VIA THE ISOLATOR AUX
ILIARY CONTACTS FOR EACH BUS BAR IF APPLICABLE BY
READING THE OPERATIONAL MEASURED VALUES ADDRESS
AND COMPARING WITH THE ACTUAL VOLTAGE #ON
NECT EACH OF THE BUS BAR VOLTAGES TO THE MEASURING
POINT IN SUCCESSION BY SWITCHING OVER THE ISOLATORS OR
BY TEMPORARILY SHORTING THE ISOLATOR AUXILIARY CON
TACTS
!N ARRANGEMENT AS IN &IGURE ENABLES VOLTAGE
CHECKS TO BE CARRIED OUT BOTH FOR THE NETWORK VOLTAGE
AND FOR THE GENERATOR VOLTAGE IN THE MEASURING BAY
/NLY ONE OF THE CIRCUIT BREAKERS A OR B MUST BE
CLOSED AT A TIME
4HE NETWORK VOLTAGE IS PRESENT IN
THE MEASURING BAY WITH THE GENERATOR BREAKER B
OPEN AND THE BUS TIE BREAKER A CLOSED 4HE GEN
ERATOR VOLTAGE CAN BE CHECKED BY OPENING THE BUS
TIE BREAKER A AND CLOSING THE GENERATOR BREAKER B
&IRST CARRY OUT VOLTAGE CHECKS WITH THE NETWORK VOLTA
GE B OPEN A CLOSED 4HE VOLTAGE IS READ OUT ON
THE PARALLELING DEVICE IN THE OPERATIONAL MEASURED
VALUES UNDER ADDRESS AS
5,,
AND COM
PARED WITH THE ACTUAL VOLTAGE .OTE THAT THE DIS
PLAYED MEASURED VOLTAGE 5 IS INFLUENCED BY THE
MATCHING FACTOR 55 TOO
4HE PHASE SEQUENCE IS SUBSEQUENTLY CHECKED )F
TWO PHASE TO PHASE VOLTAGES ARE CONNECTED ON
THE DEVICE THE PHASE ROTATION CAN ALSO BE READ OUT IN
THE OPERATIONAL MEASURED VALUES UNDER ADDRESS
AS
5 #,/#+7)3%
OR
5 #/5.4%2 #,/#+
AND COMPARED WITH THE PHASE ROTATION DETERMINED IN
THE MEASURING BAY 4HE SECONDARY WIRING TO THE PAR
ALLELING DEVICE IS ALSO CHECKED IN THIS MANNER
3UBSEQUENTLY
OPEN THE BUS TIE BREAKER A AGAIN
4HE PHASE SEQUENCE CHECK IS CARRIED OUT WITH THE
GENERATOR VOLTAGE AFTER RUNNING UP THE GENERATOR
A OPEN B CLOSED 4HE VOLTAGE CAN BE READ OUT IN
THE 6% IN THE OPERATIONAL MEASURED VALUES UNDER
ADDRESS AS
5,,
AND COMPARED WITH THE AC
TUAL VOLTAGE
4HE PHASE SEQUENCE OF THE GENERATOR VOLTAGE MUST
BE EQUAL TO THAT OF THE NETWORK VOLTAGE )F TWO PHA
SE TO PHASE VOLTAGES ARE CONNECTED ON THE DE
VICE THE PHASE ROTATION CAN BE READ OUT IN THE OPERA
TIONAL MEASURED VALUES UNDER ADDRESS AS
5
#,/#+7)3%
OR
5 #/5.4%2 #,/#+
AND COM
PARED WITH THE PHASE ROTATION DETERMINED IN THE
MEASURING BAY 4HE SECONDARY WIRING TO THE PARALLEL
ING DEVICE IS ALSO CHECKED IN THIS MANNER
3UBSEQUENTLY
OPEN BREAKER B AGAIN
3UBSEQUENT CHECKING OF THE SECONDARY VOLTAGE CIR
CUITS IS CARRIED OUT IN THAT IDENTICAL VOLTAGES ARE
APPLIED TO THE TWO VOLTAGE TRANSFORMERS 4HE BUS
TIE BREAKER A MUST BE OPEN SO THAT A NETWORK VOLTA
GE IS NOT PRESENT 4HE GENERATOR BREAKER B IS
CLOSED SO THAT THE VOLTAGES 5 AND 5 APPLIED TO THE
DEVICE ARE IDENTICAL
#ONVINCE YOURSELF USING THE OPERATIONAL MEASURED
VALUES OF THE 6% UNDER ADDRESS THAT WITHIN
THE MEASURED TOLERANCES
THE TWO VOLTAGES
5,,
AND
5,,
ARE THE
SAME
THE TWO FREQUENCIES
F
AND
F
ARE THE SAME
THE VOLTAGE DIFFERENCE
DELTA5
IS ZERO
THE FREQUENCY DIFFERENCE
DELTA&
IS ZERO
THE ANGLE DIFFERENCE
PHI
IS ZERO
4HE 6% CARRIES OUT A PHASE SEQUENCE CHECK IF
TWO PHASE TO PHASE VOLTAGES ARE CONNECTED TO IT
THE SAME PHASE SEQUENCE MUST BE INDICATED UNDER
ADDRESS FOR BOTH VOLTAGES
5
PHASE SEQUENCE EQUAL TO
5
PHASE SE
QUENCE
)N THE CASE OF SEVERAL BUS BARS THE EXAMINATION
MUST BE CARRIED OUT FOR EACH BUS BAR VOLTAGE
)N THE CASE OF SEVERAL PARALLELING LOCATIONS THE EX
AMINATION MUST BE CARRIED OUT FOR EACH LOCATION IF THE
VOLTAGES ALSO CHANGE TOGETHER WITH THE LOCATIONS
4HE ABOVE MENTIONED APPLIES ACCORDINGLY TO THE
PARALLELING OF NETWORKS &IGURE SHOWS A POSSI
BLE CONNECTION ARRANGEMENT
