Federal Pacific Electric HM631500 Circuit Breaker

Federal Pacific Electric HM631500 Circuit Breaker is a heavy-duty protective device rated at 500A, 480V, and configured as a 3-pole unit to provide three-phase protection in electrical distribution systems, automatically interrupting abnormal current flow to safeguard conductors and equipment for industrial plant power feeds, switching large loads and providing coordination with downstream devices. With a 65 kA interrupting rating, it is designed to clear high-energy faults quickly, maintaining system reliability in industrial and commercial installations that rely on 480V three-phase service. The HM631500 is a model-identifiable component from Federal Pacific Electric intended for use as a main or feeder breaker within compatible panels, delivering overcurrent protection by opening the circuit when detected. This description consolidates the verified specifications—500A nominal current, 480V operation, 3-pole configuration, and 65 kA interrupting capability—emphasizing its role as a high-current protection solution for demanding distribution networks. Because it is a 480V, 3-pole unit, it is typically used in three-phase distribution panels to protect feeders and large circuits in commercial and industrial facilities.