ABB SACE Emax2 M20 N1 Air Circuit Breaker Product Description

Overview

ABB SACE Emax2 M20 N1 is a heavy‑duty air circuit breaker from the ABB SACE Emax2 series for low‑voltage AC power distribution protection. This ABB air circuit breaker is designed for main incoming and feeder protection in industrial and commercial switchgear. The ABB SACE Emax2 M20 N1 air circuit breaker features 2000 A rated current, N1 breaking capacity grade, supporting operating voltage up to 690 V AC. Available in fixed or withdrawable versions, ABB SACE Emax2 M20 N1 simplifies cabinet inspection, routine maintenance and spare‑part replacement. As a bare frame breaker, it needs to be equipped with a compatible Ekip trip unit to implement complete protection functions and complies with IEC 60947‑2 standards for global power distribution projects.

Features

ABB SACE Emax2 M20 N1 air circuit breaker adopts optimized arc quenching and mechanical latching structure for reliable fault interruption. This ABB air circuit breaker supports long mechanical and electrical service life for regular switching cycles in distribution systems. ABB SACE Emax2 M20 N1 air circuit breaker can be fitted with Ekip electronic trip units, which allow adjustable overload, short‑time delay and instantaneous protection curves according to load characteristics. The ABB SACE Emax2 M20 N1 air circuit breaker integrates status indication and reserves interfaces for auxiliary contacts, alarm contacts, motor operators and shunt releases. This ABB air circuit breaker supports Ekip communication modules for data exchange, remote monitoring and parameter setting via fieldbus networks.

Specs

ABB SACE Emax2 M20 N1 air circuit breaker

• Brand: ABB

• Series: SACE Emax2

• Model: M20 N1

• Rated current: 2000 A

• Breaking grade: N1

• Rated operational voltage: Up to 690 V AC

• Insulation voltage: 1000 V

• Mounting type: Fixed / Withdrawable

• Trip unit: Ekip series trip unit (sold separately)

• Standard: IEC 60947‑2

• Protection: Overload, short‑circuit, optional earth‑fault protection

Principle

ABB SACE Emax2 M20 N1 air circuit breaker relies on the Ekip trip unit to continuously monitor the main circuit current. When overload occurs, the trip unit detects excess current and triggers delayed tripping. When a short‑circuit fault occurs, the trip unit sends an instantaneous release signal to separate the main contacts. The arc chamber rapidly cools and extinguishes the arc generated during contact separation to safely isolate the fault circuit. Communication modules can transmit real‑time current, alarm and breaker status to SCADA and energy management systems.

Applications

ABB SACE Emax2 M20 N1 air circuit breaker is widely used in factory main distribution rooms, commercial building power stations, data centre distribution cabinets and workshop MCC panels. This ABB air circuit breaker serves as incoming feeder and large branch protection for low‑voltage power distribution systems. ABB SACE Emax2 M20 N1 fits switchgear construction, power system upgrade and spare replacement of existing Emax2 breaker frames. It protects downstream cables, transformers and loads against overload and short‑circuit faults.

Installation & Maintenance Notes

Follow official ABB SACE Emax2 operation manuals during installation of ABB SACE Emax2 M20 N1 air circuit breaker. Select and install matching Ekip trip unit and accessories before commissioning, and apply specified torque for busbar connections. Conduct periodic visual inspection, mechanical operation test and contact check for ABB SACE Emax2 M20 N1, especially under high‑load and vibration conditions. Back up protection parameters before breaker replacement. Confirm exact model M20 N1 before spare‑part swap‑out to verify breaking capacity, frame size and trip unit compatibility with the existing switchgear system. Maintain proper cabinet ventilation to avoid high ambient temperature affecting protection accuracy.