46Bc Broken Conductor Detection; Common Settings; Broken Conductor Detection - Siemens 7SR51 Device Manual

10.9

46BC Broken Conductor Detection

Common Settings

10.9.1
Reference
I
set
I
Operate and Reset Level
I
op
t
op

Broken Conductor Detection

10.9.2
Reference
I
set
I
t
delay
Operate and Reset Level
I
op
Operate and Reset Time
t
basic
t
op
Reyrolle 7SR5, Overcurrent Protection Device, Device Manual
C53000-G7040-C014-1, Edition 11.2019
Parameter
UC guard setting
Applied current (for operate time)
Attribute
Operate level
Reset level
Operate time
Reset time
Parameter
Setting (I2/I1)
Applied current (for operate time)
Delay setting
Attribute
Operate level
Reset level
Repeatability
Variation IEC -10 °C to +55 °C
60255-1
f
rated
Attribute
Element basic operate time
Operate time following delay
Repeatability
Disengaging time
10.9 46BC Broken Conductor Detection
Value
0.05 to 5 ⋅ I
1.1 to 0.5 ⋅ I
Value
I : ± 5 % or ± 1 % I
set
90 % I ± 5 %
op
0.5 ⋅ I : 35 ms ± 10 ms
set
Value
20 % to 100 %, Δ 1 %
0.03 to 20 s, Δ 0.01 s
20 to 100 s, Δ 0.1 s
100 to 1000 s, Δ 1 s
1000 to 10000 s, Δ 10 s
1000 to 14400 s, Δ 100 s
Value
I : ± 5 %
set
90 % I ± 5 %
op
± 1 %
≤ 5 %
± 5 % ≤ 5 %
Value
40 ms ± 10 ms
t + t
basic delay
± 1 % or ± 20 ms
< 80 ms
Technical Data
, Δ 0.05
rated
(switched)
set
rated
± 1 % or ± 20 ms
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