2.4
50 Instantaneous Overcurrent
2.4.1
Reference
Parameter
Is
Setting
t
Delay setting
d
2.4.2
Operate and Reset Level
Attribute
I
Operate level
op
Reset level
Repeatability
Transient overreach
(X/R £ 100)
-10 °C to +55 °C
Variation
f
nom
2.4.3
Operate and Reset Time
Attribute
t
Element basic operate time
basic
t
Operate time following delay
op
Repeatability
Overshoot time
Disengaging time
Unrestricted ©2018 Siemens Protection Devices Limited
Value
0.05, 0.06... 2.5, 2.55... 50 xIn
0.00, 0.01...20.00, 20.10... 100, 101... 1000, 1010...
10000, 10100... 14400 s
Value
100 % Is, ± 5 % or ± 1% In
³ 95 % I
± 1 %
£ -5 %
£ 5 %
£ 5 %
± 5 %
Value
Switched from 0 to 2 xIs: 35 ms, ± 10 ms
Switched from 0 to 5 xIs: 25 ms, ± 10 ms
t
+ t
basic
± 1 % or ± 10 ms
< 40 ms
< 50 ms
7SR18 Performance Specification
op
, ± 1 % or ± 10 ms
d
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