Siemens 7SR51 - 50 G Instantaneous Earth Fault - Measured

50G Instantaneous Earth Fault – Measured
Reference
Parameter Value
Measurement RMS, fundamental
Directional control
11
Non-Dir, forward, reverse
I
set
Setting 0.005 to 0.1 ⋅ I
rated
, Δ 0.001
0.105 to 2.5 ⋅ I
rated
, Δ 0.005
2.55 to 25 ⋅ I
rated
, Δ 0.05
I Applied current (for operate time) 0 to 2 ⋅ I
set
(switched)
0 to 5 ⋅ I
set
(switched)
t
delay
Delay setting 0 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
Operate and Reset Level
Attribute Value
I
op
Operate level I
set
: ± 5 % or ± 1 % I
rated
Reset level ≥ 95 % I
op
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
: 35 ms ± 10 ms
5 ⋅ I
set
: 25 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
10.15
11
Requires VT inputs
Technical Data
10.15 50G Instantaneous Earth Fault – Measured
Reyrolle 7SR5, Overcurrent Protection Device, Device Manual 525
C53000-G7040-C014-1, Edition 11.2019