VAMP 140 - Residual Current Protection

VAMP Ltd Overcurrent and earth-fault relay
Technical description
VAMP 140
VM140.EN011 Vamp 24h support phone +358 (0)40 573 6316
47
Overcurrent stages I>> and I>>> (50/51)
Current setting range 0.10 – 40.00 pu
Definite time characteristic:
- Operating time 0.05 - 300.00 s (step 0.01)
Starting time <50 ms
Resetting time <80 ms
Resetting ratio 0.97
Inaccuracy:
- Starting ±2% of set value
- Operate time ±1% or ±30 ms
Phase unbalance stage I2> (46)
Current setting range 5 – 70% I2/I1
Definite time characteristic:
- Operating time 1.0 – 600.0s s (step 0.1)
Starting time <300 ms
Resetting time <300 ms
Resetting ratio 0.95
Inaccuracy:
- Starting ±3% of set value or
±0.5% of rated value
- Operate time ±5% or ±300 ms
Thermal overload stage T> (46)
Settings:
- Max. continuous load current k x In
(trip = thermal trip level)
0.50 - 1.20 x In
- Thermal alarm level 60 – 99%
- Heating time constant  2 – 60 min
- Cooling time constant  1.0 x tau
5.3.2. Residual current protection
Residual current stage I
0
> (50/51N)
Residual current setting range 0.005 - 2.000 pu
Definite time characteristic:
- Operating time 0.08 - 300.0 s (step 0.02 s)
Starting time <60 ms
Resetting time <80 ms
Resetting ratio 0.97
Inaccuracy:
- Starting ±2% of set value or
±0.3% of rated value
- Operate time ±1% or ±30 ms
Residual current stage I
0
>> (50/51N)
Current setting range: 0.02 – 2.00 pu
Definite time characteristic:
- Operating time 0.05 - 300.00 s (step 0.01)
Inverse time characteristic:
- 4 characteristic curve sets: (IEC60255-
3)
- Time multiplier k
EI, VI, NI, LTI *)
0.05 – 3.20
Starting time <60 ms
Resetting time <80 ms
Resetting ratio 0.97