Factory Automation

Low-voltage Circuit BreakersMolded Case Circuit Breakers with Measuring Display Unit

Molded Case Circuit Breakers with Measuring Display Unit

Introduction to MDU Breakers

These circuit breakers include a measuring display unit (MDU) for measuring, displaying, and sharing electric circuit information for improved energy savings in a space-saving design that reduces construction work.

The broad model lineup supports a variety of networks (CC-Link communication, MODBUS communication, electric energy pulse output), so they can be used in a wide range of applications, from managing energy-saving efforts to monitoring power distribution equipment.

Improved energy-saving

P
(Plan)

D
(Do)

C
(Check)

A
(Action)

The load current, line voltage, power, electric energy, harmonic current, leakage current, and power factor passing through the circuit breaker are measured and displayed, allowing for detailed energy management for improved energy savings.

Main measurement and display elements

Per-phase load current
Line voltage
Harmonic current
Power
Electric energy
Leakage current*
Leakage current*
containing harmonics
Power factor
Frequency
Reactive power
Reactive power quantity

* Leakage current can be measured by measuring the leakage current of basic waveform components or by measuring leakage currents containing harmonics. Molded case circuit breakers (MCCBs) are not supported.

Space-Saving, Reduced-Construction Design

Clean and compact wiring helps simplify work!

Circuit breaker with built-in current and voltage transformers

Wiring for independently installed circuit breakers and measurement devices is eliminated, allowing for smaller distribution panels, shorter construction periods, and reduced construction costs.

Electric Circuit Monitoring for Accident Prevention and Equipment Maintenance

Automatic recording of event cause and current when the circuit breaker is tripped

Recorded information helps ensure events do not reoccur!

Energy-Saving Design

Host system integration

Support for various communication methods (CC-Link, MODBUS, etc.)

ON

Host system integration allows for sharing of measured information as well as centralized monitoring of the entire factory or specific production lines.

* MODBUS is a registered trademark of Schneider Electric USA Inc.

Remote monitoring example

ON

GOT connectivity allows for remote monitoring of load statuses.

Direct connections to GOT devices can be made using MODBUS communication.

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