Siemens SIPROTEC 4 7VK61 - Page 245

Tolerances Voltages 3 % of set value or 1 V
Times 1 % of setting value or 10 ms
Overvoltage zero-sequence system 3U
0
or any single-phase voltage U
X
Overvoltage 3U
0
>> 1.0 V to 220.0 V; ∞ Increments 0,1 V
Delay T
3U0>>
0.00 s to 100.00 s; ∞ Increments 0.01 s
Overvoltage 3U
0
> 1.0 V to 220.0 V; ∞ Increments 0,1 V
Delay T
3U0>
0.00 s to 100.00 s; ∞ Increments 0.01 s
Dropout to pickup ratio 0.30 to 0,.9 Increments 0.01
Pickup time
With repeated measurement
Without repeated measurement
Dropout time
With repeated measurement approx. 75 ms (50 Hz)
Without repeated measurement approx. 30 ms (50 Hz)
Tolerances Voltages 3 % of set value or 1 V
Times 1 % of setting value or 10 ms
Phase-to-earth undervoltage
Under voltage U
Ph
<< 1.0 V to 100.0 V Increments 0,1 V
Delay T
UPh<<
0.00 s to 100.00 s; ∞ Increments 0.01 s
Under voltage U
Ph
< 1.0 V to 100.0 V Increments 0,1 V
Delay T
UPh<
0.00 s to 100.00 s; ∞ Increments 0.01 s
Dropout to pickup ratio 1.01 to 1.20 Increments 0.01
Current criterion Can be switched on/off
Pickup time
Dropout time Approx. 30 ms
Tolerances Voltages 3 % of set value or 1 V
Times 1 % of setting value or 10 ms
Undervoltages phase-to-phase
UndervoltageU
PhPh
<< 1.0 V to 175.0 V Increments 0,1 V
Delay T
UPhPh<<
0.00 s to 100.00 s; ∞ Increments 0.01 s
UndervoltageU
PhPh
< 1.0 V to 175.0 V Increments 0,1 V
Delay T
UPhPh<
0.00 s to 100.00 s; ∞ Increments 0.01 s
Dropout to pickup ratio 1.01 to 1.20 Increments 0.01
Current criterion Can be switched on/off
Pickup time
Dropout time Approx. 30 ms
Tolerances Voltages 3 % of set value or 1 V
Times 1 % of setting value or 10 ms
Undervoltage positive sequence system U
1
UndervoltageU
1
<< 1.0 V to 100.0 V Increments 0,1 V
Delay T
U1<<
0.00 s to 100.00 s; ∞ Increments 0.01 s
Technical Data
4.5 Under and over-voltage protection (optional)
SIPROTEC 4, 7VK61, Manual 245
C53000-G1176-C159-5, Edition 05.2018