Technical FAQs 4

Are arc flash and arc-flash studies a safety concern?

Arc-flash and arc-flash studies are also clarified. This White Paper also highlights a safety concern when HV/MV switchgear fails catastrophically, particularly oil-filled switchgear assembly. Within IEC Standards, HV switchgear are used on systems above 1 kV up to 52 kV. In North America MV is any voltage between 600 V and 69 kV.

How to evaluate arc rated switchgear in Canada?

Canada use CSA C22.2 No. 0.22-11 “Evaluation methods for arc resistance rating of enclosed electrical equipment” to evaluate internal arc rated switchgear. Internal arc type testing is very important to reduce the risk of exploding switchgear.

Does switchgear pass an arc type test?

Some switchgear is type tested during its design stage to pass an internal arc type test. Switchgear that has been designed to contain the arc should fail safely, thus avoiding risk to operators and preventing lengthy rebuilding time following catastrophic failure, should they occur.

How does Roxtec help switchgear pass internal arc type tests?

Roxtec produce a cable sealing product which helps switchgear pass internal arc type tests. Internal arc type tests are one of the most safety critical type tests for switchgear that impact the end user.

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