Siemens SIPROTEC 7SJ80 User Manual

Important: Grounding of the cable shield must be effected at the cable side
The switchover of the current polarity (address 201) also reverses the polarity of the current input IN!
[anschl-2-stromwdl-kabelumbauw-060606, 1, en_US]
Figure C-4 Current transformer connections to two current transformers - additional cable-type current
transformer for sensitive ground fault detection - only for isolated or resonant-grounded
networks
Important: Grounding of the cable shield must be effected at the cable side
The switchover of the current polarity (address 201) also reverses the polarity of the current input IN!
[anschl-3-stromwdl-kabelumbauw-060606, 1, en_US]
Figure C-5 Current transformer connections to three current transformers - ground current from addi-
tional cable-type current transformer for sensitive ground fault detection
Important: Grounding of the cable shield must be effected at the cable side
The switchover of the current polarity (address 201) also reverses the polarity of the current input INs!
Connection Examples
C.1 Connection Examples for Current and Voltage Transformers
SIPROTEC 4, 7SJ80, Manual 443
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