Siemens siprotec 7SA6 User Manual page 385

7SA6 Manual
C53000-G1176-C133-1
FKHFN, no checks are performed before manual closing. The following parameters are
then irrelevant.
Address  2SPRGH ZLWK 0& determines whether closing under asynchronous
system conditions is allowed. Set this parameter to ZLWK 7&% FORVH, if
asynchronous closing shall be allowed; the relay will then consider the circuit breaker
closing time before determining the correct instant for the close command. Remember
that closing under asynchronous system conditions is allowed only if the circuit
breaker closing time is set correctly (see above under "Preconditions")! If you wish to
only permit manual closing under synchronous system conditions, set this address to
ZR 7&% FORVH.
The permissible magnitude difference of the voltages is set under address  0&
PD[9ROW'LII. Setting is in volts secondary. When operating the device from a
personal computer using DIGSI
Depending on the connection of the bus-bar voltage (phase–phase or phase–earth)
the phase–phase or the phase–earth voltage is decisive.
The permissible frequency difference between the voltages is set under address 
0& PD[)UHT'LII, the permissible phase angle difference under address  0&
PD[$QJOH'LII.
The release conditions for manual closing are set under addresses $ to  :
$ 0& 6<1&+5
 0& 8V\Q! 8OLQH
 0& 8V\Q 8OLQH!
 0& 8V\Q 8OLQH
 0& 25,'(
The five possible release conditions are independent of each other and can be
combined.
®
4, setting may be in secondary or primary values.
= synchronism check: the bus-bar (Ubus) and the
feeder (Uline) must both be live (/LYH 9ROW
7KU, address ); the conditions for
synchronism 0& PD[9ROW'LII (address ),
0& PD[)UHT'LII (address ), and 0&
PD[$QJOH'LII (address ) are checked
before manual closure;
dead-line check: the bus-bar (Ubus) must be live
(/LYH 9ROW 7KU, refer to address ), the
feeder (Uline) must be dead ('HDG 9ROW 7KU,
refer to address );
dead-bus check: the bus-bar (Ubus) must be dead
('HDG 9ROW 7KU, refer to address ), the
feeder (Uline) must be live (/LYH 9ROW 7KU,
refer to address );
= dead-bus and dead-line check: the bus-bar (Ubus)
and the feeder (Uline) must both be dead ('HDG
9ROW 7KU, refer to address );
= manual closing is released without any check.
Functions
6-203