Siemens Siprotec 5 7SS85 - Busbar Differential Protection

Busbar Differential Protection
General Differential Protection Setting Values
Rated object current I
rated obj.
100 A to 50 000 A Increments of 1
Check Zone Setting Values
Threshold value I
diff
0.20 to 4.00 Increments of 0.01
Threshold value I
diff
(sensitive characteristic curve) 0.05 to 4.00 Increments of 0.01
Threshold value I
rest
(sensitive characteristic curve) 0.00 to 25.00 Increments of 0.01
Threshold value I
rest
(sensitive characteristic curve/
CBFP)
0.00 to 25.00 Increments of 0.01
Stabilization factor k 0.10 to 0.80 Increments of 0.01
General Busbar Section Setting Values
Threshold value I
diff
0.20 to 4.00 Increments of 0.01
Threshold value I
diff
(sensitive characteristic curve) 0.05 to 4.00 Increments of 0.01
Threshold value I
rest
(sensitive characteristic curve) 0.00 to 25.00 Increments of 0.01
Threshold value I
rest
(sensitive characteristic curve/
CBFP)
0.00 to 25.00 Increments of 0.01
Stabilization factor k 0.10 to 0.80 Increments of 0.01
Setting Values for Differential Current Supervision
Limiting value of current I/I
rated, obj
(I
rated, obj
= Rated object current)
0.05 to 0.80 Increments of 0.01
Time delay
for check zone and busbar-selective protection
1.00 s to 10.00 s Increments of 0.01
Setting Values for Cross-Stabilization
Restraint current ratio, selective zones
0.00 to 1.00 Increments of 0.01
Restraint current ratio, check zone 0.00 to 1.00 Increments of 0.01
Operate Time
Minimum operate time
High-speed relay (type HS) approx. 3 ms
Fast relay (type F) approx. 7 ms
Frequency
Frequency range
50 Hz or 60 Hz
Tolerances
Current
5 % of the setting value or 50 mA
k factor 5 % of the setting value
Times 5 % of the setting value or 50 ms
Frequency - 10 %, + 5 %
11.3
Technical Data
11.3 Busbar Differential Protection
564 SIPROTEC 5, Low-Impedance Busbar Protection 7SS85, Manual
C53000-G5040-C019-6, Edition 06.2016