CUTLER-HAMMER HMCP100R3C Instantaneous Motor Circuit Protector

Overview

CUTLER-HAMMER HMCP100R3C is a Series C HMCP type instantaneous magnetic-only motor circuit protector from Eaton Cutler-Hammer. CUTLER-HAMMER HMCP100R3C provides short-circuit protection for motor starter combinations, and works with separate electronic or thermal overload relays to complete full motor protection. This CUTLER-HAMMER HMCP100R3C is widely stocked as spare short-circuit protection unit for NEMA motor control assemblies.

Features

CUTLER-HAMMER HMCP100R3C is three-pole design with adjustable instantaneous magnetic trip setting from 300A to 1000A. It only responds to short-circuit current and does not provide thermal overload protection, so it must be paired with overload relay for motor winding overheat protection. HMCP100R3C supports high short-circuit interrupting capacity for motor branch circuits, compatible with Freedom 2100 MCC bucket and standard NEMA motor starter layouts. It accepts optional auxiliary contact and alarm contact accessories to send trip status signal to PLC or control panel. This unit follows UL489 and CSA standards, designed for 24/7 continuous operation in industrial motor control centers, pump, fan and compressor NEMA starter cabinets. It is maintained as spare replacement part for legacy Cutler-Hammer motor control systems.

Specifications

CUTLER-HAMMER HMCP100R3C Motor Circuit Protector Brand: CUTLER-HAMMER Eaton Model: HMCP100R3C Series: Series C HMCP Type: instantaneous magnetic motor circuit protector Pole: 3 poles Rated current In: 100 A Rated voltage: 600 VAC, 250 VDC Magnetic trip range: 300 A ~ 1000 A Trip principle: magnetic instantaneous only, no thermal element Certification: UL489, CSA, CE Connection: screw terminal Mounting: panel mount inside MCC bucket Protection class: IP20 Ambient temperature: -25℃ ~ +60℃ Status: legacy Cutler-Hammer MCP spare

Principle

CUTLER-HAMMER HMCP100R3C monitors three-phase motor current. This Instantaneous Motor Circuit Protector uses magnetic solenoid element to detect sharp short-circuit current surge. It trips instantly when current exceeds preset magnetic threshold to isolate fault circuit. Overload protection function is handled by external overload relay, forming a combination motor protection scheme.

Applications

CUTLER-HAMMER HMCP100R3C is deployed in NEMA motor control centers, water treatment pumps, HVAC fans, compressors and conveyor motor starter branches. It provides fast short-circuit fault isolation for motor combination starters. CUTLER-HAMMER HMCP100R3C is stocked as spare motor circuit protector for legacy Freedom 2100 motor control assemblies.