rwwengheaderLittelfuse Startco Protection Relays

The Industrial division of Littelfuse delivers vital products to address customer needs for protection, safe control and distribution of electrical power in industrial applications.

The Protection Relay and Control product portfolio includes a comprehensive line of motor and pump protection relays, arc-flash relays, ground fault relays, feeder protection, pump controllers, time delay relays, flashers and tower lighting, and more to minimize electrical safety hazards, limit equipment damage, improve productivity, and safeguard personnel from injury due to electrical faults.

Professionals in construction, manufacturing, mining, oil & gas, solar, and many more industries rely on Littelfuse for rugged, lasting protection for their designs and critical applications.

Arc-Flash Relays are an effective defence against dangerous Arc-Flash events, and the decision to include such a relay in a design is an easy one. Less easy, however, is selecting the optimal relay for an application.

Arc flash detection in less than 1 millisecond

  • Redundant Internal Trip Path – Two internal trip paths for added reliability
  • Health Monitoring – Continuously monitors connection to trip coil to ensure path is intact
  • Reliable Light Detection – Two types of light sensors (point and fiber-optic) for different applications
  • Upstream Tripping – Ability to trip upstream device if the local breaker fails to clear the fault
  • Optional Current Detection for Fault Verification – Avoid nuisance tripping with  current-supervised arc-flash trips
  • Tie Breaker Tripping – Ability to trip both incoming feeder and tie breaker when arc is detected
  • Zone Tripping – Ability to trip 2 separate zones with 1 relay
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