Siemens SIPROTEC 7SJ80 User Manual

[7sj6x_rueckfallverzoegerung_i_gr_ph_260803_he, 1, en_US]
Figure 2-7 Logic diagram of the dropout delay for 50-1
[7sj6x-ueberstromst-ie-20061212, 1, en_US]
Figure 2-8
Logic diagram for the 50N-1 overcurrent current element
If parameter MANUAL CLOSE is set to 50N-1 instant. and manual close detection applies, the trip is initi-
ated as soon as the pickup conditions arrive, even if the element is blocked via a binary input.
The same applies to 79 AR 50N-1 inst.
The pickup values of each 50-1, 50-2 element for the phase currents and 50N-1, 50N-2 element for the
ground current and the valid delay times for each element can be set individually.
The dropout delay only functions if no inrush was detected. An incoming inrush will reset a running dropout
time delay.
Functions
2.2 Overcurrent Protection 50, 51, 50N, 51N
SIPROTEC 4, 7SJ80, Manual 61
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