VAMP 130
Overcurrent and earth-fault relay
Technical Description
VAMP Ltd
40
Vamp 24h support phone : +358 (0)40 573 6316
VM130.EN003
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
<60 ms
Resetting ratio
0.97
Inaccuracy:
- Starting
±2% of set value or
±0.3% of rated 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.
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
<60 ms
Resetting ratio
0.97
Inaccuracy:
- Starting
±2% of set value or
±0.3% of rated value
- Operating time definite time
- Operating time inverse time
±1% or ±30 ms
±5% or at least ±30 ms (I
0
< 5 x I
0n
)
*) EI = Extremely Inverse, VI = Very Inverse, NI = Normal inverse, LTI = Long Time Inverse
**) This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.
Residual current stage I
0
>>> (50/51N)
Residual current setting range
0.05 - 4.00 pu
Definite time characteristic:
- Operating time
0.05* - 300.0 s (step 0.01 s)
Starting time
<60 ms
Resetting time
<60 ms
Resetting ratio
0.97
Inaccuracy:
- Starting
±2% of set value or
±0.3% of rated 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.