Undercurrent; Reference; Operate And Reset Level; Operate And Reset Time - Siemens 7SR17 Rho Manual

2.5

37 Undercurrent

2.5.1

Reference

Parameter
Is 37-n Setting
t 37-n Delay setting
d
2.5.2

Operate and Reset Level

Attribute
I Operate level
op
Reset level
Repeatability
Variation
2.5.3

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 ...5.0 x In
0.00 ... 14400 s
Value
100 % Is, 5 % or 1% In
105 % I
op
1 %
5 %
5 %
Value
0.5 x Is: 35 ms, 10ms
t + t , 1 % or 10ms
basic d
1 % or 10ms
< 40 ms
< 60 ms
Chapter 3 Page 23 of 46