VAMP Ltd
Overcurrent and earth-fault relay
Technical description
VAMP 140
VM140.EN011
Vamp 24h support phone +358 (0)40 573 6316
27
3.2.
Overcurrent and earth-fault protection
of an overhead line feeder
Figure 3.2-1 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.