Siemens 7SJ85 - Current-Unbalance Protection for Capacitors, 3-Phase

Current-Unbalance Protection for Capacitors, 3-Phase
Setting Values for the Function
Automatic compensation Yes
No
Time between switch off and switch on 0.00 s to 60.00 s Increments of 0.01 s
Normalization with Ic Yes
No
Threshold of defective C-
element
1 A @ 50 and 100 Irated 0.030 A to 35.000 A Increments of 0.001 A
5 A @ 50 and 100 Irated 0.15 A to 175.00 A Increments of 0.01 A
1 A @ 1.6 Irated 0.001 A to 1.600 A Increments of 0.001 A
5 A @ 1.6 Irated 0.005 A to 8.000 A Increments of 0.001 A
Setting Values (Overcurrent-Protection Stage I>)
Measured value compensated
non-compensated
I
unbal.
1 A @ 50 and 100 Irated 0.030 A to 35.000 A Increments of 0.001 A
5 A @ 50 and 100 Irated 0.15 A to 175.00 A Increments of 0.01 A
I
unbal.
1 A @ 1.6 Irated 0.001 A to 1.600 A Increments of 0.001 A
5 A @ 1.6 Irated 0.005 A to 8.000 A Increments of 0.001 A
Operate delay 0.00 s to 60.00 s Increments of 0.01 s
Setting Values (Counter Stage)
Type of counting groups
segregated
sum
Max. no. of def. elem. phs A 1 to 1000 Increments of 1
Max. no. of def. elem. phs B 1 to 1000 Increments of 1
Max. no. of def. elem. phs C 1 to 1000 Increments of 1
Operate delay 0.00 s to 10000.00 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)
Times
Operate time with time delay = 0 ms
Approx. 32 ms + OOT
114
at 50 Hz
Approx. 29 ms + OOT at 60 Hz
12.25
114
OOT (Output Operating Time): additional delay of the output medium used, see chapter 12.1.4 Relay Outputs
Technical Data
12.25 Current-Unbalance Protection for Capacitors, 3-Phase
1500 SIPROTEC 5, Overcurrent Protection, Manual
C53000-G5040-C017-8, Edition 07.2017