Design and Connection System
14
7SS52 V4 Manual
C53000-G1176-C182-3
2.0 General
The SIPROTEC 7SS52 V4 distributed busbar and breaker failure protection is com-
prised of:
• Central unit
• Bay units
• Data links (fiber-optic cables)
Prefabricated fiber optic cables with double-end ST plug connectors are used for the
data exchange.
They can be delivered with specific anti-rodent protection for outdoor installation. In-
door cables may be used for centralized configuration of the bay units.
Power supply The modules in the bay unit and central unit are powered by powerful power supply
units. For the range required for your specific input voltage, please refer to the selec-
tion and ordering data in the Table A-1, page 336.
Bonding power fail-
ure
Short dips or failures of the supply voltage up to 50 ms, which may occur due to short-
circuits in the DC supply system of the station, are compensated by a DC storage ca-
pacitor (for nominal voltages ≥ 60 V).
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