Siemens siprotec 7SD5 User Manual page 321

conditions")! If you wish to permit manual closure or closing via control command only
under synchronous system conditions, set this address to w/o T-CB close.
The permissible difference between the voltages is set in address 3531 MC
maxVolt.Diff. The setting is applied in Volts secondary. This value can be entered
as a primary value when parameterizing with a PC and DIGSI
connection these are phase-to-earth voltages or phase-to-phase voltages.
The permissible frequency difference between the voltages is set at address 3532 MC
maxFreq.Diff, the permissible phase angle difference at address 3533 MC
maxAngleDiff.
The further release conditions for manual reclosing or reclosure via control command
are set under addresses 3535 to 3539.
The following addresses mean:
3535 MC SYNCHR
3536 MC Usyn> Uline<
3537 MC Usyn< Uline>
3538 MC Usyn< Uline<
3539 MC O/RIDE
The five possible release conditions are independent from each other and can be
combined.
Note
The closing functions of the device issue individual output indications for the corre-
sponding close command. Be sure that the output indications are assigned to the
correct output relays.
No. 2851 „AR CLOSE Cmd." for CLOSE via command of the automatic reclosure,
No. 562 „Man.Close Cmd" for manual CLOSE via binary input,
No. 2961 „Sync.CloseCmd" for CLOSE via synchronism check (not required if syn-
chronism check releases the other CLOSE commands),
No. 7329 „CB1-TEST close" for CLOSE by circuit breaker test,
additionally CLOSE command via control, e.g. „52 Close".
mands described above.
7SD5 Manual
C53000-G1176-C169-1
No. 510 „Relay CLOSE" general CLOSE command. It comprises all CLOSE com-
2.16 Synchronism and Voltage Check (optional)
The busbar (UBus) and the feeder (ULine) must both
be live (Live Volt. Thr., address 3503); the con-
ditions for synchronism are checked, i.e. MC
maxVolt.Diff (address 3531), MC maxFreq.Diff
(address 3532) and MC maxAngleDiff (address
3533). This parameter can only be altered with DIGSI
under Additional Settings.
The busbar (UBus) must be live (Live Volt. Thr.,
address 3503), the feeder (ULine) must be dead
(Dead Volt. Thr., address 3502);
The busbar (UBus) must be dead (Dead Volt.
Thr., address 3502), the feeder (ULine) must be live
(Live Volt. Thr., address 3503);
The busbar (UBus) and the feeder (ULine) must both
be dead (Dead Volt. Thr., address 3502);
Manual closing or closing via control command is re-
leased without any check.
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. Depending on the VT
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