VAMP 140
Overcurrent and earth-fault relay
Technical description
VAMP Ltd
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Vamp 24h support phone +358 (0)40 573 6316
VM140.EN011
3.
Application examples
3.1.
Overcurrent, earth-fault and phase
discontinuity protection of an
overhead line feeder
Figure 3.1-1 Three-phase overcurrent protection, earth-fault protection and
phase discontinuity protection of an overhead line feeder. The earth-fault
current is measured with a residual current connection of the current
transformers. The analog mA output can be used to show the load current of
one of the phases. The signal can be wired to a local meter or to an
automation system