81Hbl5 Over Fluxing Detector; Reference; Operate And Reset Level; Operate And Reset Time - Siemens Argus 7SR21 Technical Manual

3.7

81HBL5 Over Fluxing Detector

3.7.1

Reference

Parameter
Setting
I (Ratio of 5th Harmonic current to
Fundamental component current)
3.7.2

Operate and Reset Level

Attribute
I Operate level
op
Reset level
Repeatability
Variation
3.7.3

Operate and Reset Time

Attribute
t Element basic operate time
basic
Reset Time
Unrestricted © 2013 Siemens Protection Devices Limited
-10 °C to +55 °C
+ 2 Hz £ 5 %
f - 3 Hz to f
nom nom
7SR21 & 7SR22 Performance Specification
Value
0.10, 0.11... 0.5
Value
100 % I, ± 4 % or ± 1% In
, ± 4 % or ± 1% In
100 % I
op
± 1 %
£ 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
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