Schneider Electric Masterpact NT16 HA Air Circuit Breaker Product Description

Overview

Schneider Electric NT16 HA is an air circuit breaker from the Schneider Masterpact NT series for low‑voltage AC power distribution. This Schneider air circuit breaker has a 1600 A frame size, HA stands for high breaking capacity grade, widely used for main incoming, bus tie and heavy feeder protection in industrial, commercial and data centre switchgear. NT16 HA supports fixed or withdrawable configuration and requires a compatible Micrologic electronic trip unit to implement adjustable protection functions. It is a well‑known legacy ACB model, frequently used for cabinet retrofitting and spare‑part replacement of existing Masterpact NT systems.

Features

Schneider Electric NT16 HA air circuit breaker adopts high‑efficiency arc quenching structure to handle high short‑circuit fault current. This Schneider air circuit breaker can be equipped with Micrologic 2.0 / 5.0 / 6.0 trip units to configure overload, short‑time delay, instantaneous and earth‑fault protection curves. NT16 HA integrates built‑in metering for current, power and energy when paired with advanced trip units. The Schneider air circuit breaker reserves mounting positions for motor operator, shunt release, undervoltage release, auxiliary and alarm contacts for remote tripping and status feedback. This Schneider air circuit breaker supports Modbus communication modules for remote monitoring, alarm upload and parameter adjustment via SCADA systems.

Specs

Schneider Electric NT16 HA air circuit breaker

• Brand: Schneider Electric

• Series: Masterpact NT

• Model: NT16 HA

• Frame rated current: 1600 A

• Breaking grade: HA (high breaking capacity)

• Rated operational voltage: Up to 690 V AC

• Poles: 3P / 4P

• Mounting: Fixed / Withdrawable

• Trip unit: Micrologic series (sold separately)

• Insulation voltage: 1000 V

• Standard: IEC 60947‑2

Principle

Schneider Electric NT16 HA air circuit breaker uses the Micrologic electronic trip unit to continuously sample current signals from built‑in current transformers. In overload conditions, the trip unit triggers delayed tripping following the long‑time protection curve. During severe short‑circuit faults, the instantaneous protection function quickly releases the contact mechanism. The arc chute cools, splits and extinguishes the arc generated during contact separation to safely isolate the fault circuit. Communication accessories transmit real‑time electrical measurements, breaker status and fault records to the upper monitoring system.

Applications

Schneider Electric NT16 HA air circuit breaker is widely deployed in factory main distribution rooms, commercial buildings, data centre power rooms, water treatment plants and large‑scale MCC panels. This Schneider air circuit breaker serves as incoming feeder protection, transformer secondary protection and bus coupler protection. NT16 HA fits power panel overhaul and spare replacement of legacy Masterpact NT air breaker systems. It protects downstream cables, transformers and loads from overload and short‑circuit damage.

Installation & Maintenance Notes

Follow official Schneider Masterpact NT service manuals during installation of Schneider Electric NT16 HA air circuit breaker. Apply the specified torque for main terminals to avoid thermal overheating. Select matching Micrologic trip unit and accessories before commissioning, and back up all protection setpoints before replacement. Conduct regular inspection of operating mechanism, contact condition and cable tightness, especially in dusty and high‑vibration environments. Confirm exact model NT16 HA, pole count and breaking capacity grade during spare‑part swap‑out to guarantee compatibility with existing switchgear and protection scheme. Maintain cabinet ventilation to prevent excessive ambient temperature affecting trip accuracy.