Eaton MWI616 Magnum ACB Unit

Module Feature

MWI616 belongs to Eaton Magnum series draw-out air circuit breaker.

It is designed for low voltage main incoming and bus-coupler distribution application, equipped with electronic trip unit for adjustable protection curves. Draw-out structure provides connection, test and isolation three positions for convenient maintenance. It supports power measurement and communication expansion, widely used in industrial plant, data center and power distribution cabinet.

Working principle

Current transformer samples three-phase current and transmits signal to electronic trip unit.

When overload, short circuit or earth fault occurs, trip unit releases mechanical mechanism to open main contacts and extinguish fault current by arc chute. Electrical data and fault records can be uploaded to upper monitoring system via communication module.

Onboard components

Main contact assembly, arc extinguish chamber, current transformer, electronic trip controller, motor charging mechanism, draw-out base, secondary terminal block.

LED indicators

Front LEDs display ready status, closing position, trip alarm and protection fault.

Hardware self‑diagnosis

Trip unit continuously monitors CT circuit, controller hardware and coil state, records fault event information.

Programming software

Eaton Power Xpert Software, used for protection setting, electrical parameter monitoring and fault log export.

Electrical & Process Parameters

Model:MWI616 Brand:Eaton Device type:Draw-out air circuit breaker Rated frame current:1600A Breaking capacity:65kA Rated insulation voltage:1000V Function:Overload, short circuit and earth fault protection for low voltage distribution

Mechanical & Structure

Mounting:Draw-out installation inside switchgear

Protection class:IP30 cabinet, breaker IP20

Housing:Metal frame with arc chute assembly

Environmental

Operating temperature:-5℃ ~ +40℃

Storage temperature:-40℃ ~ +85℃

Ambient humidity:5~95% non‑condensing

Certification:CE, IEC60947-2

Status:Original Eaton power distribution spare

Installation

Install draw-out base in switch compartment and connect main busbar.

Check three-phase wiring and CT polarity before energizing, configure protection parameters and test closing/tripping action.

Interface

Main busbar terminal, secondary control terminal block, communication module port, trip/close coil terminal.

Diagnostic

Fail to close: Energy storage incomplete, interlock locked, undervoltage coil damaged.

Unplanned trip: Overload, short circuit or earth fault on downstream circuit.

No communication: Communication module damaged, bus address mismatch.

Contact overheating: Insufficient busbar tightening torque, contact ablation.

Product Brief

Eaton MWI616 Magnum draw-out air circuit breaker, 1600A frame ACB for large low-voltage power distribution protection.