Siemens Siprotec 5 7SS85 Techical Data

Inherent Circuit-Breaker Failure Protection
Setting Values
Phase-current threshold
values
For I
rated
= 1 A 0.03 A to 35.00 A Increments of 0.01 A
For I
rated
= 5 A 0.15 A to 175.00 A
Threshold value sensitive For I
rated
= 1 A 0.03 A to 35.00 A Increments of 0.01 A
For I
rated
= 5 A 0.15 A to 175.00 A
Delay T2 for 3-pole trip 0.05 s to 60 s Increments of 0.001 s
Dropout
The greater dropout differential (= | pickup value – dropout value |) of the following 2 criteria
applies:
Dropout differential derived from the parameter Dropout ratio
If this parameter is not available, a dropout ratio of 95 % applies for overcurrent and of 105 % for undercur-
rent functionality.
Minimum absolute dropout differential
Protection-class current transformer 15 mA sec. (I
rated
= 1 A) or
75 mA sec. (I
rated
= 5 A)
Instrument current transformer 0.5 mA sec. (I
rated
= 1 A) or
2.5 mA sec. (I
rated
= 5 A)
Frequency Operating Range
0.9 ≤ f/f
rated
≤ 1.1 According to specified tolerances
10 Hz ≤ f < 0.9 f
rated
1.1 f
rated
< f ≤ 80 Hz
Slightly expanded tolerances
f < 10 Hz
f > 80 Hz
Active
Tolerances
Threshold values
2 % of the setting value or 1 % of the rated current
Times 1 % of the setting value or 10 ms
11.6
Technical Data
11.6 Inherent Circuit-Breaker Failure Protection
SIPROTEC 5, Low-Impedance Busbar Protection 7SS85, Manual 569
C53000-G5040-C019-6, Edition 06.2016

Siemens Siprotec 5 7SS85 Specifications

General

Brand	Siemens
Model	Siprotec 5 7SS85
Category	Industrial Equipment
Language	English