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2.9
50 Overcurrent
2.9.1
Reference
Parameter
Is
50-n Setting
i
Applied Current (for operate time)
t
50-n Delay setting
d
2.9.2
Operate and Reset Level
Attribute
I
Operate level
op
Reset level
Repeatability
Transient overreach
(X/R
100)
Variation
2.9.3
Operate and Reset Time
Attribute
t
Element basic operate time
basic
t
Operate time following delay
op
Repeatability
Overshoot time
Disengaging time
©2014 Siemens Protection Devices Limited
-10 °C to +55 °C
f
- 3 Hz to f
+ 2 Hz
nom
nom
Chapter 3) 7SR17 Rho Performance Specification
Value
0.05, 0.06... 25, 25.5... 50 xIn
2 to 5 x Is
0.00 ... 14400 s
Value
100 % Is,
5 % or
1% In
95 % I
op
1 %
-5 %
5 %
5 %
Value
2 x Is: 35 ms,
10ms
5 x Is: 25 ms,
10ms
t
+ t
,
1 % or
10ms
basic
d
1 % or
10ms
< 40 ms
< 50 ms
Chapter 3 Page 29 of 46
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