Functions
2.14 Reverse-Power Protection Application with Flexible Protection Function
SIPROTEC, 7SK80, Manual
E50417-G1140-C344-A4, Release date 08.2010
219
Figure 2-78 Example of a substation supplied by the internal generator
Substation Layout
On the high-voltage side, the substation is linked to the power supply company's system via a 110 kV line. The
circuit breaker CB1 is part of the power supply company's system. Disconnection of the substation from the
power supply company's system is effected via the switch disconnector. The transformer with a transformation
ratio of 10:1 transforms the voltage level to 11 kV. On the low-voltage side, the transformer, generator and two
feeders are linked via a busbar. The circuit breakers CB2 to CB5 separate the consumers and operational
equipment from the busbar.
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