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- P391 Rotor Earth Fault Module
- ADV
- P391 Rotor Earth Fault Module
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P391 Rotor Earth Fault Module
- Detects rotor earth fault faults in the field winding of the generator.
- Requires the P34x relay to have the current loop CLIO hardware option fitted.
- Used with P342, P343, P344, P345 and P346 Generator protection relays
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