Relays Reduce Fire Hazards
Description
Earth Leakage Monitoring Relays, the DEA71 and DEB71, provide machine protection against fault currents and help to reduce fire hazards when used in conjunction with a CTG Series Core Balance Current Transformer and appropriate circuit breaker. These relays react to small changes in current, which can occur due to insulation or grounding failures.
Two models, each offering choices of threshold ranges, allow users to find the right solution for their unique requirements. DEA71 features fixed trip levels which offer time-saving installation, with a reliable tripping level and safety against tampering. DEB71 provides ability to adjust trip levels and includes an adjustable time delay; a lockable front cover provides further tamper protection.
A key advantage offered by DEA71 and DEB71 is avoidance of nuisance tripping in the circuit, in accordance with the EN 60947-2 Annex M norm. Two separate alarm outputs allow for a warning signal to be generated before a shutdown is necessary. Their compact (35 mm wide) housing preserves valuable panel space.
The DEA71 and DEB71 perform crucial monitoring of earth leakage, prolonging machine life by limiting damage from ground faults as well as reducing fire risk. They conform to global standards such as UL 508, CSA C22.2 and EN 60947-2 Annex M.
Specs
- DEA71 includes two models with fixed trip setting: 30 mA and 300 mA.
- DEB71 includes two models with adjustable trip levels: 30 mA to 5 A and 300 mA to 30 A
- Two SPDT relay outputs, for warning and for alarm
- 24 to 240VAC power supply
- NORM DIN-rail housing 35 mm
- Lockable lid on adjustable models (DEB71)