VAMP 150 - Residual Current Protection

VAMP 150 Motor protection relay
Technical Description
VAMP Ltd
44
Vamp 24h support phone : +358 (0)20 753 3264 VM150.EN005
Incorrect phase sequence I2>> (46)
Setting: 80 % (fixed)
Operating time <120 ms
Undercurrent protection stage I< (37)
Current setting range: 20 – 70 %I
MOT
(step 1%)
Definite time characteristic:
- operating time 0.3 – 300.0s s (step 0.1)
Block limit: 15 % (fixed)
Starting time <300 ms
Resetting time <300 ms
Resetting ratio 1.05
Accuracy:
- starting ±2% of set value
- operating time ±1% or ±200 ms
5.3.2. Residual current protection
Residual current stage I
0
> (50/51N)
Residual current setting range 0.005 - 2.000 pu (step 0.005)
Definite time characteristic:
- operating time 0.08* - 300.00 s (step 0.02 s)
Starting time <60 ms
Resetting time <60 ms
Resetting ratio 0.97
Accuracy:
- 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 (step 0.01)
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 (step 0.01)
Starting time <60 ms
Resetting time <60 ms
Resetting ratio 0.97
Accuracy:
- 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.