Neutral Voltage Displacement; Reference (59Ndt); Operate And Reset Level (59Ndt); Operate And Reset Time (59Ndt) - Siemens Argus 7SR21 Technical Manual

2.20 59N Neutral Voltage Displacement

2.20.1 Reference (59NDT)

Parameter
Vs Setting
t Delay setting
d

2.20.2 Operate and Reset Level (59NDT)

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

2.20.3 Operate and Reset Time (59NDT)

Attribute
t Element basic operate time
basic
t Operate time following delay
op
Repeatability
Overshoot time
Disengaging time

2.20.4 Reference (59NIT)

Parameter
M Multiplier setting
Vs Setting
t Delay setting
d
t Reset setting
res
Unrestricted © 2013 Siemens Protection Devices Limited
Value
1, 1.5... 100 V
0.00, 0.01...20.00, 20.50... 100, 101... 1000, 1010... 10000,
10100... 14400 s
Value
100 % Vs, ± 2 % or ± 0.5 V
³ 95 % V
± 1 %
£ 5 %
£ 5 %
- 3 Hz to f + 2 Hz
nom
Value
Switched from 0 to 1.5 xVs, 76 ms, ± 20 ms
Switched from 0 to 10 xVs, 63 ms, ± 20 ms
t
basic
± 1 % or ± 20 ms
< 40 ms
< 50 ms
Value
0.1, 0.2... 10, 10.5... 140
1, 1.5... 100 V
0, 0.01... 20 s
0, 1...60 s
7SR21 & 7SR22 Performance Specification
or ± 0.25 V
op
, ± 1 % or ± 20 ms
+ t
d
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