Specifications

7SR242 Duobias Performance Specification
©2010 Siemens Protection Devices Limited Chapter 3 - Page 35 of 45
2.12 59N Neutral Voltage Displacement
2.12.1 Reference (59NDT)
Parameter Value
V
s
Setting 1, 1.5… 100V
t
d
Delay setting
0.00, 0.01…20.00, 20.50… 100, 101… 1000, 1010… 10000,
10100… 14400 s
2.12.2 Operate and Reset Level (59NDT)
Attribute Value
V
op
Operate level
100 % Vs, r 2 % or r 0.5 V
Reset level
t 95 % V
op
Repeatability
r 1 %
-10 °C to +55 °C
d 5 %
Variation
f
nom
- 3 Hz to f
nom
+ 2 Hz
d 5 %
2.12.3 Operate and Reset Time (59NDT)
Attribute Value
0V to 1.5 xVs, 76 ms, r 20ms
t
basic
Element basic operate time
0V to 10 xVs, 63 ms, r 20ms
t
op
Operate time following delay
t
basic
+ t
d
, r 1 % or r 20ms
Repeatability
r 1 % or r 20ms
Overshoot time < 40 ms
Disengaging time < 50 ms
2.12.4 Reference (59NIT)
Parameter Value
M
Multiplier setting 0.1, 0.2… 10, 10.5… 140
Vs
Setting 1, 1.5… 100V
t
d
Delay setting 0, 0.01… 20 s
t
res
Reset setting 0, 1…60 s
2.12.5 Operate and Reset Level (59NIT)
Attribute Value
V
op
Operate level
105 % Vs, r 2 % or r 0.5 V
Reset level
t 95 % V
op
Repeatability
r 1 %
-10 °C to +55 °C
d 5 %
Variation
f
nom
- 3 Hz to f
nom
+ 2 Hz
d 5 %