VAMP Ltd
Overcurrent and earth-fault relay
Technical Description
VAMP 130
VM130.EN003
Vamp 24h support phone : +358 (0)40 573 6316
25
3.2.
Overcurrent and earth-fault
protection of a distribution transformer
feeder
2
19
12
1
20
11
3
17
4
16
5
14
6
13
9
7
12
8
8
11
7
9
10
10
X1
X1
X2
IL3
1A
5A
I
0
VAMP 130
T1
T2
A1
A2
A3
IF
Protection function
3I>>>
L >
3I >
3I >>
~
IL1
1A/5 A
IL2
1A/5 A
1A/5 A
CBFP
DR
Measurement
functions
Phase currents,
residual current,
ILmax
Disturbance
Recorder
kuvax9
Figure 3.2-1 Overcurrent and earth-fault of a distribution transformer feeder.
The binary input of the relay is used for collecting contact alarm signals
from, e.g. the distribution transformer Buchholz relay (gas relay) and/or oil
level supervision device or the oil temperature alarm contact.
