Differential current monitoring relays are used for monitoring fault currents and leakage currents in electrical installations and networks. The relays detect deviations between outgoing and return currents and signal unwanted leakage currents to earth. This helps to detect faults, damage and safety risks at an early stage while improving the availability of installations.
Reliable differential current monitoringDOLD differential current monitoring relays are suitable for monitoring AC and AC/DC networks and can, depending on the type, be used with external differential current transformers. In addition, models are available with adjustable response values, switch-off delays and functions for preventive fault current monitoring and installation protection.
Applications in industryDifferential current monitoring relays are used in machine building, industrial installations, power distribution systems and building installations where reliable fault current monitoring is required. Thanks to their compact design, the relays can easily be integrated into new and existing installations.
Key features of differential current monitoring relays:
- Monitoring of fault and leakage currents
- Detection of unwanted leakage currents to earth
- Suitable for AC and AC/DC networks
- Adjustable response values and switch-off delays
- Suitable for use with external differential current transformers
- Compact design and easy integration
