7SR21 & 7SR22 Performance Specification
2.10 50 Instantaneous Overcurrent
2.10.1 Reference
Parameter
Is
Setting
i
Applied Current (for operate time)
t
Delay setting
d
2.10.2 Operate and Reset Level
Attribute
I
Operate level
op
Reset level
Repeatability
Transient overreach
(X/R £ 100)
Variation
2.10.3 Operate and Reset Time
Attribute
t
Element basic operate time
basic
t
Operate time following delay
op
Repeatability
Overshoot time
Disengaging time
Unrestricted Page 32 of 68
-10 °C to +55 °C
+ 2 Hz £ 5 %
f
- 3 Hz to f
nom
nom
Value
0.05, 0.06... 25, 25.5... 50 xIn
Current switched from below Is to 2x Is
Current switched from below Is to 5x Is
0.00, 0.01...20.00, 20.50... 100, 101... 1000, 1010...
10000, 10100... 14400 s
Value
100 % Is, ± 5 % or ± 1% In
³ 95 % I
op
± 1 %
£ -5 %
£ 5 %
Value
Switched from 0 to 2x Is: 40 ms, ± 10 ms
Switched from 0 to 5x Is: 30 ms, ± 10 ms
, ± 1 % or ± 10 ms
t
+ t
basic
d
± 1 % or ± 10 ms
< 40 ms
< 50 ms
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