87GH Restricted Earth-Fault Protection – High-Impedance
Reference
Parameter
Value
I
set
Setting
0.005 to 0.95 ⋅ I
rated
, Δ 0.005
I
Applied current (for operate time)
0 to 2 ⋅ I
set
(switched)
0 to 5 ⋅ I
set
(switched)
t
delay
Delay setting
0 to 1 s, Δ 0.005 s
Operate and Reset Level
Attribute
Value
I
op
Operate level
I
set
: ± 5 % or ± 1 % ⋅ I
rated
Reset level
95 % I
op
: ± 5 % or ± 0.1 % ⋅ I
rated
Repeatability
± 1 %
Transient overreach (X/R ≤ 100)
≤ -5 %
Variation IEC
60255-1
-10 °C to +55 °C
≤ 5 %
f
rated
± 5 %
≤ 5 %
Operate and Reset Time
Attribute
Value
t
basic
Element basic operate time
2 ⋅ I
set
: 45 ms ± 10 ms
5 ⋅ I
set
: 35 ms ± 10 ms
t
op
Operate time following delay
t
basic
+ t
delay
± 1 % or ± 10 ms
Repeatability
± 1 % or ± 10 ms
Overshoot time
< 40 ms
Disengaging time
< 50 ms
10.31
Technical Data
10.31 87GH Restricted Earth-Fault Protection – High-Impedance
498
Reyrolle 7SR5, Transformer Protection Device, Device Manual
C53000-G7040-C015-1, Edition 11.2019
Содержание Reyrolle 7SR5
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