Circuit Breakers help switchboard pass 100kA test
A
Terasaki (Europe) product story
Edited by the Engineeringtalk editorial team
Sep 28, 2001
A new electrical distribution switchboard, the PowerMax 100, has successfully passed the most onerous operational and fault condition tests in low voltage distribution.
A new electrical distribution switchboard, the PowerMax 100, has successfully passed the most onerous operational and fault condition tests in low voltage distribution.
The system was designed in Kent by Arcontrol and incorporates TemPower Air Circuit Breakers from Terasaki.
Twenty of the UK's leading Consultant Electrical Engineers witnessed the tests, which were conducted at the British Short-Circuit Testing Station in Newcastle.
Short-time withstand test currents of 100kA for one second were fed through the main horizontal busbars to the incoming vertical busbars, vertical 1600A distribution busbars and a 1600A ACB feeder module.
These were preceded by a full temperature rise test at 6300A on the main horizontal busbars, incoming copperwork and Terasaki breaker.
All the tests were passed without modification of the test sample, and the switchboard remained naturally ventilated throughout the temperature rise test.
This was an outstanding achievement at such a high current rating, where temperature de-rating is the industry norm.
The success means that system designers have a solution with which to approach the divergent client requirements of limited space for switchgear and increasing electricity demand.
More power can now be safely concentrated through a single incoming switchboard, reducing the cost and complexity of a design.
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