Siemens Siprotec 5 7SS85 Techical Data

Circuit-Breaker Failure Protection 1-Pole/3-Pole
Starting Conditions
For circuit-breaker failure protection
1-pole tripping internal or external
15
3-pole tripping internal or external
16
Setting Values
Phase-current threshold
values
1 A @ 100 Irated 0.030 A to 35.000 A Increments of 0.001 A
5 A @ 100 Irated 0.150 A to 175.000 A Increments of 0.010 A
Threshold value sensitive 1 A @ 100 Irated 0.030 A to 35.000 A Increments of 0.001 A
5 A @ 100 Irated 0.150 A to 175.000 A Increments of 0.010 A
Supervision time of release signal 0.06 s to 1.00 s Increments of 0.01 s
Time delays 0.05 s to 60.00 s Increments of 0.001 s
Supervision time of binary inputs 0.05 s to 60.00 s Increments of 0.01 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)
Circuit-Breaker Supervision
Supervision of circuit-breaker auxiliary-contact position
For 3-pole CB tripping 1 input each for make contact and break contact
For 1-pole CB tripping 1 input each for auxiliary contact per pole or
1 input for each series connection make contact and
break contact
i
i
NOTE
The circuit-breaker failure protection can also work without the circuit-breaker auxiliary contacts stated.
Auxiliary contacts are required for circuit-breaker failure protection in cases where the current flow is
absent or too low for tripping (for example with a transformer or a Buchholz protection).
Times
Pickup time, in the case of an internal start
Pickup time, in the case of an external start
< 1 ms
< 5 ms
Dropout time for Unbalancing operating mode Approx. 2 ms
Typical dropout time < 15 ms
11.4
15
Via binary inputs
16
Via binary inputs
Technical Data
11.4 Circuit-Breaker Failure Protection 1-Pole/3-Pole
SIPROTEC 5, Low-Impedance Busbar Protection 7SS85, Manual 565
C53000-G5040-C019-6, Edition 06.2016

Siemens Siprotec 5 7SS85 Specifications

General

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