Siemens 7SJ85 - Stage with Inverse-Time Characteristic Curve

Tolerances
Pickup value
I
2
/I
rated, obj
Approx. 2 % of the setting value
or 0.8 % of the absolute value
I
2
/I
1
Approx. 2 % of the setting value
or 4 % of the absolute value (I
1
> 50 mA
(I
rated
= 1 A) or 250 mA (I
rated
= 5 A))
Time delays 1 % of the setting value or 10 ms
Stage with Inverse-Time Characteristic Curve
Setting Values
Reference value for I
2
(I
ref
) Rated object current I
rated,obj.
Positive-sequence current I
1
Pickup value 5.0 % to 999.9 % l
2
/l
ref
Increments of 0.1
Dropout Disk emulation
Instantaneous
Time multiplier 0.05 to 15.00 Increments of 0.01
Release current (minimum
current release)
1 A @ 50 and 100 Irated 0.030 A to 10.000 A Increments of 0.001 A
5 A @ 50 and 100 Irated 0.15 A to 50.00 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
Maximum phase current
(maximum current
limiting)
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
Dropout
The greater dropout differential (= | pickup value – dropout value |) of the following 2 criteria
applies:
•
Dropout differential derived from the parameter Dropout ratio
•
Dropout differential of 3 % of the object rated current
Times
Pickup time
Approx. 40 ms + OOT
108
at 50 Hz
Approx. 35 ms + OOT at 60 Hz
Dropout time Approx. 35 ms + OOT
Dropout Ratio
Disk emulation
Approx. 0.90 ⋅ threshold value
Instantaneous Approx. 1.05 ⋅ threshold value
Approx. 0.95 ⋅ pickup value
12.20.2
108
OOT (Output Operating Time): additional delay of the output medium used, see chapter 12.1.4 Relay Outputs
Technical Data
12.20 Negative-Sequence Protection
SIPROTEC 5, Overcurrent Protection, Manual 1489
C53000-G5040-C017-8, Edition 07.2017