Schneider NW16H13PMDO2 ACB Unit

Module Feature

NW16H13PMDO2 is Schneider Masterpact NW drawout type air circuit breaker.

It adopts 3-pole construction, 1600A frame size, high H breaking class. It is equipped with Micrologic electronic trip unit supporting selective LSIG protection, pre-installed PM electrical motor operating mechanism and DO alarm/digital output contact. Drawout chassis allows rack withdrawal, test and isolation position without de-energizing upstream bus. It supports communication expansion module for power monitoring and SCADA remote upload. This legacy NW series is widely stocked as critical spare for power plant, oil & gas and factory low voltage main switchgear cabinet.

Working principle

Current transformers sample three-phase current signals and send data to Micrologic trip unit.

Electronic protection board continuously compares measured current with preset protection curves. When overload, short circuit or earth fault condition is detected, it triggers mechanical trip release to separate main contacts and isolate fault circuit. Motor operator completes remote electrical closing operation. The breaker stores fault timestamp, waveform and operation counter, and sends alarm signal via DO contact or communication bus.

Onboard components

Main contact assembly, arc extinguishing chamber, CT sensor set, Micrologic electronic trip unit, PM spring charging motor mechanism, auxiliary contact block, alarm DO contact, drawout chassis, front operation window and reinforced insulated housing.

LED indicators

Front indicators show breaker ON, breaker OFF, spring charged and fault trip status. Protection parameters and fault codes are displayed on Micrologic trip unit panel.

Hardware self‑diagnosis

Micrologic trip unit monitors trip coil continuity, CT signal integrity, spring motor fault, internal power loss and hardware anomaly. Parameter setting and fault log reading are completed by EcoStruxure Power Commission software.

Programming software

EcoStruxure Power Commission, used for overload curve, short circuit threshold, earth fault setting and communication address configuration.

Electrical & Process Parameters

Model:NW16H13PMDO2 Brand:Schneider Electric Device type:Masterpact NW drawout air circuit breaker Function:Overload, short circuit and earth fault selective protection for 3-pole low voltage main incoming and bus tie circuit

Mechanical & Structure

Mounting:Switchgear cabinet drawout chassis installation Protection class:IP30 front panel, IP20 terminal compartment Housing:Heavy-duty insulated air circuit breaker housing

Environmental

Operating temperature:-10℃ ~ +55℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing

Certification:CE, IEC60947-2 Status:Original Schneider legacy distribution spare

Installation

Isolate upstream power supply before replacement.

Check primary busbar connection and secondary control wiring, confirm three-phase phase sequence, test drawout test/isolation position, set protection parameters according to design, test electric closing, tripping and DO alarm function after commissioning.

Interface

Three-phase main bus terminal, secondary screw terminal block for motor operator, auxiliary contact, DO alarm contact and communication module.

Diagnostic

Cannot electrically close: Spring not charged, control power missing or interlock active. False earth fault trip: CT polarity reversed, neutral stray leakage or improper earth threshold. DO no alarm output: Alarm contact burnout, wiring open or trip unit configuration error.

Product Brief

NW16H13PMDO2 air circuit breaker, Schneider Masterpact NW 1600A 3P drawout ACB spare for industrial low voltage main power distribution cabinet replacement.