Siemens 7SR51 Device Manual page 512

Technical Data
10.8 46 Negative-Sequence Overcurrent Protection
Operate and Reset Level
I
op
Operate and Reset Time
t
op
512
Attribute
Operate level
Reset level
Repeatability
Variation IEC -10 °C to +55 °C
60255-1
f
rated
Attribute
Starter operate time (≥ 2 ⋅ I
Operate time char = IEC-NI,
IEC-VI,
IEC-EI,
IEC-LTI
char = ANSI-MI,
ANSI-VI,
ANSI-EI
char = DTL
Reset time ANSI Decaying
t
reset
Repeatability
Overshoot time
Disengaging time
Value
105 % I : ± 4 % or ± 1 % I
set
> 95 % I
op
± 1 %
≤ 5 %
± 5 % ≤ 5 %
Value
) 35 ms ± 10 ms
set
± 5 % or ± 50 ms
IEC-NI: K = 0.14, α = 0.02
IEC-VI: K = 13.5, α = 1
IEC-EI: K = 80, α = 2
IEC-LTI: K = 120, α = 1
± 5 % or ± 50 ms
ANSI-MI: A = 0.0515, B = 0.114, P = 0.02
ANSI-VI: A = 19.61, B = 0.491, P = 2
ANSI-EI: A = 28.2, B = 0.1217, P = 2
t ± 1 % or ± 20 ms
delay
± 5 % or ± 50 ms
ANSI-MI: R = 4.85
ANSI-VI: R = 21.6
ANSI-EI: R = 29.1
t ± 1 % or ± 20 ms
reset
± 1 % or ± 20 ms
< 40 ms
< 60 ms
Reyrolle 7SR5, Overcurrent Protection Device, Device Manual
C53000-G7040-C014-1, Edition 11.2019
rated