Siemens SIPROTEC 7SJ80 User Manual

[bsb-schaltanl-gen-eigenvers-20061205, 1, en_US]
Figure 2-103
Example of a substation with autonomous generator supply
Substation Layout
The control system is on the high-voltage side linked via a 110 kV line to the power system of the power
supply company. The circuit breaker CB1 is part of the power system of the power supply company. Discon-
nection from the control system of the power supply company's power system is effected by the load-isolator.
The transformer with a transformation ratio of 10:1 transforms the voltage level to 11 kV. The transformer,
the generator and the two feeders are linked via a busbar at the low-voltage side. Circuit breakers CB2 to CB5
separate consumer and operational equipment from the busbar.
Functions
2.19 Reverse-Power Protection Application with Flexible Protection Function
254 SIPROTEC 4, 7SJ80, Manual
E50417-G1140-C343-A8, Edition 12.2017

Siemens SIPROTEC 7SJ80 Specifications

General

Rated Frequency	50/60 Hz
Rated Current	1 A / 5 A
Operating Temperature	-25°C to +55°C
Storage Temperature	-40°C to +70°C
Current Transformer Inputs	4
Application	Protection of feeders, motors, transformers, and generators
Rated Voltage	100-240 V AC/DC
Communication Protocols	IEC 61850, Modbus, DNP3, IEC 60870-5-103
Display	Graphical LCD
Mounting	Flush mounting
Protection Functions	Overcurrent, Earth fault
Communication Interfaces	Ethernet, RS485
Housing	Plastic
Weight	Approx. 1.5 kg