/PERATING INSTRUCTIONS
6+
6
# ' #
,IMIT VALUE
5 FOR THE PERMISSIBLE VOLTAGE DIFFERENCE IN
MAGNITUDE PHASE PHASE OR PHASE EARTH IN 6
3MALLEST SETTING VALUE
,ARGEST SETTING VALUE
$ % , 4 !
5
6
6
6
,IMIT VALUE
F FOR THE PERMISSIBLE FREQUENCY DIFFERENCE
IN (Z
3MALLEST SETTING VALUE
,ARGEST SETTING VALUE
$ % , 4 !
F
( Z
(Z
(Z
,IMIT VALUE
FOR THE PERMISSIBLE PHASE ANGLE DIFFER
ENCE IN
^
3MALLEST SETTING VALUE
,ARGEST SETTING VALUE
$ % , 4 !
0 ( )
^
^
^
4HE SYNCHRONISM AND VOLTAGE CHECK FUNCTION IN
6+ CAN ALSO GIVE CLOSING COMMAND IN ASYNCH
RONOUS NETWORKS )N THIS CASE CLOSING COMMAND IS
GIVEN SUCH THAT
UNDER CONSIDERATION OF THE CIRCUIT
BREAKER CLOSING TIME ADDRESS
THE VOLTAGE
PHASORS OF THE LINE AND BUS BAR VOLTAGES AGREE IN
PHASE AT THE INSTANT WHEN THE BREAKER POLES TOUCH
EACH OTHER
&OR
AUTOMATIC
RECLOSURE
ADDRESS
$%,F39.# DEFINES THE LIMIT WITHIN WHICH THE FRE
QUENCY DIFFERENCE MUST LIE WHEN THE NETWORKS ARE
REGARDED AS SYNCHRONOUS !BOVE THIS FREQUENCY DIF
FERENCE ASYNCHRONOUS CLOSING IS CARRIED OUT UNDER
CONSIDERATION OF THE PHASE ANGLE DIFFERENCE FRE
QUENCY DIFFERENCE AND THE CIRCUIT BREAKER CLOSING
TIME "ELOW THIS FREQUENCY DIFFERENCE THE SYNCHRO
CHECK CONDITIONS AS SET UNDER ADDRESSES
AND ARE ONLY RELEVANT 4HE SETTING VALUE
OF ADDRESS MUST LIE BELOW THAT OF ADDRESS
)F SET TO
0
ASYNCHRONOUS SWITCHING IS SUPPRESSED
FOR AUTOMATIC RECLOSURE
,IMIT VALUE
F FOR SYNCHRONOUS AUTO RECLOSURE
3MALLEST SETTING VALUE
,ARGEST SETTING VALUE
AND
0
NO ASYNCHRONOUS AUTO RECLOSURE
$ % , F 3 9 . #
( Z
(Z
(Z
0
4HE FURTHER RELEASE CONDITIONS FOR AUTOMATIC RECLOS
ING ARE SET UNDER ADDRESSES TO
39.#(2 SYNCHRO CHECK THE CONDITIONS
FOR SYNCHRONISM
5
F AND
ARE CHECKED BEFORE RECLOSURE
55 DEAD BUS CHECK THE FEEDER
5 MUST BE LIVE 5 REFER AD
DRESS THE BUS BAR 5
MUST BE DEAD 5 REFER TO AD
DRESS
55 DEAD LINE CHECK THE FEEDER
5 MUST BE DEAD 5 REFER AD
DRESS THE BUS BAR 5
MUST BE LIVE 5 REFER TO ADDRESS
55 DEAD LINE AND DEAD BUS CHECK
THE FEEDER 5 AND THE BUS BAR
5 MUST BOTH BE DEAD 5 REFER
TO ADDRESS
/6%22)$% AUTOMATIC RECLOSURE IS RELEASED
WITHOUT ANY CHECK
4HE FIVE POSSIBLE RELEASE CONDITIONS ARE INDEPEN
DENT FROM EACH OTHER AND CAN BE COMBINED