R-K Electronics, Inc. Protection Relays & Systems PRR-100

The PRR series is a phase loss and reversal relay for three-phase AC systems, designed to de-energize contacts upon phase loss of 18% or phase reversal. The 100 Series operates from 110VAC to 120VAC, 3Ø, with a contact rating of 7 Amps at 120VAC and 100,000 full load electrical cycles. It features SPDT or DPDT output contacts, screw terminals, surface mounting, and a dust cover. The unit consumes 16VA and operates within 0°C to 40°C ambient temperatures. Its physical dimensions are 4.25 inches tall, 3.75 inches deep, and 2.75 inches wide. The relay includes a normal condition LED indicator and fixed 5-second pick-up and drop-out delays for phase loss detection.