To make use of the advantages of the various detection methods in different earthfault-situations, the freely programmable earthfault-detection-relay EOR-D makes it possible to select and combine the following earthfault detection methods:
Transient-Method with qu-algorithm
- up to fault resistance of some kOhm
- Restriking and intermittent earthfaults
Harmonics-Method
- compare of amounts
- Direction of reactive power
Wattmetric-Method
- Direction of active power
- Increase of active current
Pulse-Method (= location in depth)