Siemens 7SR51 - 10.37 87 GH Restricted Earth-Fault Protection - High-Impedance

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
10.37
Technical Data
10.37 87GH Restricted Earth-Fault Protection – High-Impedance
552 Reyrolle 7SR5, Overcurrent Protection Device, Device Manual
C53000-G7040-C014-1, Edition 11.2019