VAMP 140
Overcurrent and earth-fault relay
Technical description
VAMP Ltd
48
Vamp 24h support phone +358 (0)40 573 6316
VM140.EN011
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
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
<80 ms
Resetting ratio
0.97
Inaccuracy:
- Starting
±2% of set value or
±0.3% of rated value
- Operate time
±1% or ±30 ms
5.3.3.
Second harmonic function
2. Harmonic stage / Inrush (68)
Settings:
- Setting range 2.Harmonic
10 – 100 %
- Operating time
0.05* – 300.00 s (step 0.01 s)
*)
This is the instantaneous time i.e. the minimum total operational time including the fault
detection time and operation time of the trip contacts.
5.3.4.
Arc protection (option)
The operation of the arc protection depends on the setting value
of the ArcI> current limit. The current limit cannot be set,
unless the relay is provided with the optional arc protection
card.
Arc protection stage ArcI> (51L>)
Current setting range
0.5 – 10.0 pu
Operating time
Arc sensor channel selection
~ 15 ms
S1, S2, BI, S1/S2, S1/BI, S2/BI, S1/S2/BI
The operation of the earth-fault arc protection depends on the
setting value of the ArcIo> earth-fault limit. The earth-fault
limit cannot be set, unless the relay is provided with the
optional arc protection card.
Arc protection stage Arc I
0
> (51NL>)
Current setting range
0.05 – 10.0 pu
Operating time
Arc sensor channel selection
~ 15 ms
S1, S2, BI, S1/S2, S1/BI, S2/BI, S1/S2/BI
Delayed Arc S>
Delay time
Arc sensor channel selection
0.01 – 0.15
S1, S2, BI, S1/S2, S1/BI, S2/BI, S1/S2/BI