Main Switchboards (MSBs)

Main Switchboards

A main switchboard is a large electrical switchboard that connects to the grid and distributes power to other smaller switchboards on the site. It normally includes a electricity retailer section where the metering is held. It is the central point where electrical power is received from the utility company and then distributed to various circuits and electrical loads throughout the building.

Main switchboards must be built to a verified design following AS/NZS 61439. This involves short cirtuit testing, temperature rise testing, voltage frequency withstand testing and various other verification requirements.

Electrical Engineering and Manufacturing

Why our Main Switchboards?

AS/NZS 61439 Compliant
Our main switchboards have been tested to be compliant with AS/NZS 61439. We have verified various designs at both PLUS ES in Lane Cove and TUV in Heidleberg.
Thousands of Switchboards Manufactured
Our manufacturing team has extensive experience and has worked on thousands of projects across Australia.
Trusted by Industry
With extensive experience, comes reliability. We are trusted by many major organisations across Australia as a safe pair of hands for their switchboard manufacturing requirements.

Main Switchboard Components

Key features of a main switchboard typically include:

Main Switch or Circuit Breaker – This is the primary disconnect switch or circuit breaker that allows the entire electrical supply to be shut off in case of emergency or maintenance. This is sometimes also refered to as an SPD (Service Protection Device) depending on the Australian state.

Busbars – Busbars are thick bars or conductors that carry the electrical current from the main switch to various circuit breakers or distribution points.

Circuit Breakers – These are devices that protect individual circuits from overloads or faults. They can be controlled manually or automatically and are used to isolate specific areas of the electrical system.

Meters and Monitoring Equipment – Some main switchboards include meters and monitoring equipment to measure electrical consumption and monitor the health of the electrical system.


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