Siemens 7SR224 - Instantaneous Overcurrent; Reference; Operate and Reset Level; Operate and Reset Time

7SR224 Argus Performance Specification
2.6 50 Instantaneous Overcurrent
2.6.1 Reference
Parameter Value
Is
Setting 0.05, 0.06 …2, 2.05… 25, 25.5… 50 xIn
I
Applied Current (for operate time) 5 xIs
t
d
Delay setting
0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010…
10000, 10100… 14400 s
2.6.2 Operate and Reset Level
Attribute Value
I
op
Operate level
100 % Is, ± 5 % or ± 1% In
Reset level
≥ 95 % I
op
Repeatability
± 1 %
Transient overreach
(X/R ≤ 100)
≤ -5 %
-10 °C to +55 °C
≤ 5 %
Variation
f
nom
- 3 Hz to f
nom
+ 2 Hz
≤ 5 %
2.6.3 Operate and Reset Time
Attribute Value
0 to 2 xIs: 35 ms, ± 10ms
t
basic
Element basic operate time
0 to 5 xIs: 25 ms, ± 10ms
t
op
Operate time following delay
t
basic
+ t
d
, ± 1 % or ± 10ms
Repeatability
± 1 % or ± 10ms
Overshoot time < 40 ms
Disengaging time < 50 ms
©2010 Siemens Protection Devices Limited Chapter 3 Page 23 of 49