VAMP Ltd
Over-, under-, residual voltage and
frequency relay
Technical description
VAMP 135
VM135.EN008
VAMP 24h support phone : +358 (0)20 753 3264
33
5.3.
Protection stages
5.3.1.
Overvoltage protection
Overvoltage stages U>, U>> and U>>> (59)
Overvoltage setting range:
0.50 - 1.50 %Un (U>)
0.50 - 1.60 %Un (U>>, U>>>)
Definite time characteristic:
- operating time
0.08* - 300.00 s (step 0.02) (U>)
0.06* - 300.00 s (step 0.02) (U>>, U>>>)
Release delay
0.06 - 300.00 s (step 0.02) (U>)
Hysteresis
0.1 - 20.0% (step 0.1%) (U>)
Starting time
<60 ms
Resetting time
<60 ms
Resetting ratio
0.97
Accuracy:
- starting
±3% of set value
- operate time
±1% or ±30 ms
*)
This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.
5.3.2.
Undervoltage protection
Undervoltage stages U<, U<< and U<<< (27)
Undervoltage setting range
0.20 - 1.20 %Un
Definite time characteristic:
- operating time
0.08* - 300.00 s (step 0.02) (U<)
0.06* - 300.00 s (step 0.02) (U<<, U<<<)
Release delay
0.06 - 300.00 s (step 0.02) (U<)
Hysteresis
0.1 - 20.0% (step 0.1%) (U<)
Self-blocking value of the undervoltage
0 – 80 %Un
Starting time
<60 ms
Resetting time
<60 ms
Resetting ratio
1.03
Accuracy:
- starting
±3% of set value
- operate time
±1% or ±30 ms
*)
This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.
5.3.3.
Residual voltage protection
Residual voltage stages U
0
>, U
0
>> (59N)
Residual voltage setting range
1 - 80 % (U
0
>)
10 – 100 % (U
0
>>)
Definite time characteristic:
- operating time
0.3 – 300.0 s (step 0.1 s)
Release delay
0.06 - 300.00 s (step 0.02) (U
0
>)
Starting time
<300 ms
Resetting time
<300 ms
Resetting ratio
0.97
Accuracy:
- starting
±2% of set value or ±3% of U
0n
- operate time
±1% or ±30 ms
