81Hbl5 Overfluxing Detector; Reference; Operate And Reset Level; Operate And Reset Time - Siemens 7SR242 Duobias Technical Manual

3.4 81HBL5 Overfluxing Detector

3.4.1 Reference

Parameter
Setting
I (Ratio of 5th Harmonic current to
Fundamental component current)

3.4.2 Operate and Reset Level

Attribute
I Operate level
op
Reset level
Repeatability
Variation

3.4.3 Operate and Reset Time

Attribute
t Element basic operate time
basic
Reset 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
0.10, 0.11... 0.5
Value
100 % I, 4 % or 1% In
100 % I , 4 % or 1% In
op
1 %
5 %
5 %
Value
Will pick-up before operation of any protection element due
to overfluxing
Will operation until drop-off of any protection element due
to overfluxing
Chapter 3 Page 50 of 50