Siemens 7SR12 Argus - Neutral Voltage Displacement; Reference (59 NDT); Operate and Reset Level (59 NDT); Operate and Reset Time (59 NDT)

7SR11 & 7SR12 Performance Specification
©2017 Siemens Protection Devices Limited Chapter 3 Page 46 of 56
2.19 59N Neutral Voltage Displacement
2.19.1 Reference (59NDT)
Parameter Value
Vs
Setting 1.0, 1.5 ... 100V
t
d
Delay setting 0.00, 0.01…20.00 s
2.19.2 Operate and Reset Level (59NDT)
Attribute
Value
V
op
Operate level
100 % Vs, ± 2 % or ± 0.5 V
Reset level
≥ 95 % V
op
or ± 0.5 V
Repeatability
± 1 %
Variation
-10 °C to +55 °C
≤ 5 %
f
nom
± 5 %
≤ 5 %
2.19.3 Operate and Reset Time (59NDT)
Attribute
Value
t
basic
Element basic operate time
0V to 1.5 xVs, 76 ms, ± 20ms
0V to 10 xVs, 63 ms, ± 20ms
t
op
Operate time following delay
t
basic
+ t
d
, ± 1 % or ± 20ms
Repeatability
± 1 % or ± 20ms
Overshoot time < 40 ms
Disengaging time <100 ms
2.19.4 Reference (59NIT)
Parameter Value
M
Time Multiplier setting 1
Vs
Setting 1, 1.5… 100V
3V
o
Applied Current (for Operate-Time)
IDMTL
2 x Vs
t
d
Delay setting 0, 0.01… 20 s
t
res
Reset setting 0, 1…60 s
2.19.5 Operate and Reset Level (59NIT)
Attribute Value
V
op
Operate level
100 % Vs, ± 2 % or ± 0.5 V
Reset level
≥ 95 % V
op
or ± 0.5 V
Repeatability
± 1 %
Variation
-10 °C to +55 °C
≤ 5 %
f
nom
± 5 %
≤ 5 %
Operate and Reset Time (59NIT)
Attribute Value
t
basic
Starter operate time
65 ms, ± 20ms
3V
o
Applied Current (for Operate-Time)
DTL
10 x Vs