Instantaneous Overcurrent; Reference; Operate And Reset Level; Operate And Reset Time - Siemens 7SR242 Duobias Technical Manual

2.7

50 instantaneous overcurrent

2.7.1

Reference

Parameter
Is Setting
t Delay setting
d
2.7.2

Operate and Reset Level

Attribute
I Operate level
op
Reset level
Repeatability
Transient overreach
(X/R 100)
Variation
2.7.3

Operate and Reset Time

Attribute
t Element basic operate time
basic
t Operate time following delay
op
Repeatability
Overshoot time
Disengaging time
©2015 Siemens Protection Devices Limited
-10 °C to +55 °C
f - 3 Hz to f + 2 Hz
nom nom
Chapter 3) 7SR242 Duobias Performance Specification
Value
0.05, 0.10... 25, 25.5... 50 xIn
0.00, 0.01...20.00, 20.50... 100, 101... 1000, 1010...
10000, 10100... 14400 s
Value
100 % Is, 5 % or 1% In
95 % I
op
1 %
-5 %
5 %
5 %
Value
0 to 2 xIs: 35 ms, 10ms
0 to 5 xIs: 25 ms, 10ms
t + t , 1 % or 10ms
basic d
1 % or 10ms
< 40 ms
< 50 ms
Chapter 3 Page 28 of 50