Overview
The Westinghouse HMCP030H1C 30A motor circuit protector (style 6630C87G11) is a molded-case, magnetic-only protective device designed for three-phase industrial motor circuits. Unlike standard thermal-magnetic circuit breakers, this HMCP unit provides instantaneous magnetic trip protection only—overload protection must be supplied by separate motor starter heaters. It is rated for 600VAC and 250VDC, making it suitable for heavy industrial and manufacturing environments requiring fast fault detection and isolation.
Key Features
- Magnetic-only protection: Instantaneous trip eliminating nuisance thermal faults in motor inrush scenarios
- 3-pole configuration: Three-phase motor circuit protection with individual pole terminals
- Adjustable instantaneous trip: Selectable 90–300A range (designations A through H) for motor-specific coordination
- High voltage rating: 600VAC/250VDC for industrial and utility-grade applications
- Bolt-on or line lug terminals: Includes top and bottom lugs for flexible installation in motor control centers (MCCs)
- Molded-case frame: F-frame design rated for 65 kAIC @ 480V, providing robust short-circuit withstand
