Ground Fault Check - Siemens 7SC80 Manual

•
Via a binary input (170.0043
release. If there is, the VT mcb for the busbar voltage is not allocated. Check whether this is the required
state, alternatively check the binary input
•
Close the VT mcb of the busbar voltage again.
•
Open the circuit breaker.
•
For the synchrocheck, the program SYNC V1<V2> is set to YES (address 6107) and SYNC V1>V2< is set
to NO (address 6108).
•
Via a binary input (170.0043
must release closing (message 170.0049
and the corresponding parameters again thoroughly as described in Section
•
Open the VT mcb of the feeder voltage.
•
Via a binary input (170.0043
given.
•
Close the VT mcb of the busbar voltage again.
Addresses 6107 to 6110 must be restored as they were changed for the test. If the allocation of the LEDs or
signal relays was changed for the test, this must also be restored.
[mes-span-sync-121212, 1, en_US]
Figure 3-32
3.3.12

Ground Fault Check

Ungrounded Systems
The ground fault check is only necessary if the device is operated in an isolated or resonant-grounded system
and ground fault detection is used. The device must thus have been preset during configuration of the device
functions to Sens. Gnd Fault = Enabled (address 131). In all other cases, this section is irrelevant.
The primary check serves to find out the correct polarity of the transformer connections for the determination
of the ground fault direction.
SIPROTEC Compact, 7SC80, Manual
E50417-G1140-C486-A8, Edition 07.2017
>25 Sync requ. ) a measurement request is entered. There is no close
>25 Sync requ. ) a measurement request is entered. The synchrocheck
>25 Sync requ. ) a measurement request is entered. No close release is
Measuring Voltages for Synchrocheck
>FAIL: BUS VT (6510).
25 CloseRelease ). Otherwise check all voltage connections
Mounting and Commissioning
3.3 Commissioning
2.20 Synchrocheck.
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