Siemens SIPROTEC 7SJ80 User Manual

Negative Sequence Protection (inverse-time characteristics)
Setting Ranges / Increments
Pickup value 46-TOC (Ι
2p
) for Ι
Nom
= 1 A
0.05 A to 2.00 A Increments 0.01 A
for Ι
Nom
= 5 A
0.25 A to 10.00 A
Time Multiplier T
I2p
(IEC) 0.05 s to 3.20 s or ∞ (disabled) Increments 0.01 s
Time Multiplier D
I2p
(ANSI) 0.50 s to 15.00 s or ∞ (disabled) Increments 0.01 s
Functional Limit
Functional Limit
for Ι
Nom
= 1 A
all phase currents ≤ 10 A
for Ι
Nom
= 5 A
all phase currents ≤ 50 A
Trip Time Curves acc. to IEC
See also Figure 4-7
The trip times for Ι
2
/Ι
2p
≥ 20 are identical to those for Ι
2
/Ι
2p
= 20
Pickup Threshold
approx. 1.10· Ι
2p
4.10
Technical Data
4.10 Negative Sequence Protection (inverse-time characteristics)
384 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