The Quad Plus team was called in to perform third-party acceptance testing for medium (13,200 volts) and low voltage (480 and 208 volts) switchgear and transformers for a research facility datacenter/supercomputer.
During the electrical switchgear testing, the arc-flash reduction settings were improperly input into the breakers. The arcflash reduction settings are crucial to allow workers to safely de-energize the switchgear when performing maintenance on the board and performance of live work without the use of specialized arc-flash suites rated greater than 40 cal/cm2.
In addition, we identified issues with the relay settings for the medium voltage switchgear that prevented any of the medium voltage breakers from being shut. We also found protection settings not in accordance with the short-circuit coordination study. This is vital to the safety of personnel and equipment in the event of an arc flash, arc-blast, or another incident that would put the system outside normal operating parameters.