VAMP 130 - 3 Application Examples; Overcurrent, Earth-Fault and Phase Discontinuity Protection of an Overhead Line Feeder

VAMP 130 Overcurrent and earth-fault relay
Technical Description
VAMP Ltd
24
Vamp 24h support phone : +358 (0)40 573 6316 VM130.EN003
3. Application examples
3.1. Overcurrent, earth-fault and phase
discontinuity protection of an
overhead line 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 3.1-1 Three-phase overcurrent protection and earth-fault protection of
an overhead line feeder. The earth-fault current is measured with a residual
current connection of the current transformers.