Features
11
7SS52 V4 Manual
C53000-G1176-C182-3
Each bay unit 7SS525 has
•
3 command relays with each 2 NO contacts
•
2 command relay with 1 NO contact
•
1 command relay with 1 NO contact
•
1 alarm relay with 1 NC contact (device failure, not marshallable)
The functional allocation of the outputs can be marshalled with the DIGSI communi-
cation software.
10 freely marshallable binary inputs are available for control functions or state recog-
nition.
1 LED is freely allocable.
Measuring and
testing functions
The SIPROTEC 7SS52 V4 distributed busbar and circuit breaker failure provides a va-
riety of measuring and testing functions to assist during commissioning and mainte-
nance. These functions are:
•
Display of the feeder currents per phase in each bay unit and in the central unit. In
addition the data are available at the serial port for visualization in the DIGSI soft-
ware.
•
Phase-selective and zone-selective calculation of differential and stabilizing cur-
rents. Display in the DIGSI software through the serial PC port. In addition, the data
are visualized per phase, per bus zone, and for the checkzone, in the display of the
central unit. The display of the bay unit shows only the data for the check zone.
•
Monitoring of the zone-selective and phase-selective differential currents with zone-
selective blocking or alarm output
•
Monitoring of the zone-selective and phase-selective differential currents with zone-
selective blocking or alarm output
•
Phase-selective trip test including control of the feeder circuit breaker (through
DIGSI, bay unit display or binary input)
•
Bay out of service
Removal of one bay from the busbar protection processing via central unit or bay
unit, e.g during maintenance works.
•
Revision mode
The isolator replica of one bay is retained by the central and the bay unit with the
protection function remaining active.
•
Cyclic test of measured value acquisition, measured value processing and trip cir-
cuit test including the coils of the command relays
•
Manual blocking
Blocking of the circuit breaker failure protection, the XMZ and the backup breaker
failure protection and of the TRIP commands.
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Содержание SIPROTEC 7SS522 V4.6
Страница 326: ...Maintenance and Repair 310 7SS52 V4 Manual C53000 G1176 C182 3 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 432: ...Appendix 416 7SS52 V4 Manual C53000 G1176 C182 3 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...
Страница 438: ...Index 422 7SS52 V4 Manual C53000 G1176 C182 34 w w w E l e c t r i c a l P a r t M a n u a l s c o m ...