MOELLER NZM7-100S-NA Molded Case Circuit Breaker

Overview

MOELLER NZM7-100S-NA is a legacy NZM7 frame molded case circuit breaker with thermal magnetic trip unit, rated current 100A, three-pole configuration. MOELLER NZM7-100S-NA is designed for North American market standard, provides adjustable thermal overload and adjustable magnetic short-circuit protection for low voltage distribution feeders and motor circuits. This MOELLER NZM7-100S-NA is widely stocked as spare molded case circuit breaker for legacy NZM7 power distribution assemblies.

Features

MOELLER NZM7-100S-NA thermal magnetic trip unit supports adjustable long-time overload setting and adjustable instantaneous magnetic short-circuit threshold. S version stands for high interrupting capacity type, suitable for locations with high prospective short-circuit current. NZM7-100S-NA supports optional accessories including auxiliary contact, alarm contact, shunt trip release and undervoltage release. It adopts screw terminal connection, front handle for local manual ON OFF operation and trip status indication. The NA suffix indicates UL 489 North American certification version. This breaker complies with IEC 60947-2 and UL 489 standards. It is discontinued by manufacturer and maintained as spare part for old switchboard retrofit and replacement. It is designed for 24/7 continuous operation in industrial low voltage panels, pump and fan control cabinets, and factory power distribution systems.

Specifications

MOELLER NZM7-100S-NA MCCB Brand: MOELLER Eaton Model: NZM7-100S-NA Frame size: NZM7 Type: thermal magnetic molded case circuit breaker Pole: 3 poles Rated current In: 100 A Trip type: adjustable thermal overload, adjustable magnetic short circuit Rated operational voltage: 600 VAC Breaking capacity: high Icn rating for S type Certification: UL489, CSA, IEC60947-2 Connection: screw terminal Mounting: panel mount Protection class: IP20 Ambient temperature: -10℃ ~ +60℃ Status: discontinued legacy NZM7 spare

Principle

MOELLER NZM7-100S-NA uses bimetallic element for overload detection and magnetic coil for short-circuit detection. This Molded Case Circuit Breaker trips when long-time overload exceeds thermal setting, and trips instantly when short-circuit current exceeds magnetic threshold. It isolates fault circuit to protect cables, motors and upstream distribution equipment. Trip status can be transmitted via auxiliary and alarm contacts to PLC or monitoring system.

Applications

MOELLER NZM7-100S-NA is deployed in old industrial low voltage distribution switchboards, water treatment equipment, conveyor systems and motor feeder protection circuits. It serves as main and branch circuit protection for legacy NZM7 panel replacement. MOELLER NZM7-100S-NA is stocked as spare molded case circuit breaker for NZM7 low voltage power distribution assemblies.