Operate And Reset Level (59Nit); Operate And Reset Time (59Nit) - Siemens Argus 7SR21 Technical Manual

Overcurrent relay
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7SR21 & 7SR22 Performance Specification

2.20.5 Operate and Reset Level (59NIT)

Attribute
V
Operate level
op
Reset level
Repeatability
-10 °C to +55 °C
Variation
f
nom

2.20.6 Operate and Reset Time (59NIT)

Attribute
t
Starter operate time (³ 2xVs)
basic
char = IDMTL
Operate
t
op
time
char = DTL
char = IDMTL
Reset Time
char = DTL
Repeatability
Overshoot time
Disengaging time
Unrestricted Page 50 of 68
Value
105 % Vs, ± 2 % or ± 0.5 V
³ 95 % V
± 1 %
£ 5 %
£ 5 %
- 3 Hz to f
+ 2 Hz
nom
Value
65 ms, ± 20 ms
t
t
d
t
res
t
res
± 1 % or ± 20 ms
< 40 ms
< 50 ms
or ± 0.25 V
op
M
=
, ± 5 % or ± 65 ms
[
]
op
-
3
V
0
1
Vs
, ± 1 % or ± 40 ms
, ± 5 % or ± 65 ms
, ± 1 % or ± 40 ms
© 2013 Siemens Protection Devices Limited

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