Siemens SIPROTEC 7SJ80 User Manual

Characteristic Curve
The function's characteristic curve is always “definite time”; this means that the time delay is not affected by
the measured quantity.
Function Logic
The following figure shows the logic diagram of a three-phase function. If the function operates on one phase
or without phase reference, phase selectivity and phase-specific indications are not relevant.
[logik-flexstz-100504-st, 1, en_US]
Figure 2-102
Logic diagram of the flexible protection functions
Functions
2.18 Flexible Protection Functions
244 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