Phasing Check at 3.3kV Switchboard for Parallel Transformer Operation

This is a record of a phasing check of 2 matched 8MVA 11/3.3kV transformers (secondary side) that feed a 3.3kV switchboard. This check is undertaken to ensure that the secondary phases of the 2 transformers have the same vector sequences. This will allow the 2 transformers to be paralleled safely either temporarily to enable maintenance switching without consumer outages or continuously for a more secure network (dependant on system design, fault level withstand, protection system configuration etc). Many engineers and electricians can go through the entire career and never see this test, so why not check it out.

From design through to certification, let's give you a glimpse inside the world of the industrial electrical environment covering systems, networks & apparatus up to 33kV and down to 24VDC!

These videos are for general information and entertainment purposes only. They are not intended as a set of instructions or guide on how to execute any electrical works. All our works are undertaken by competent and authorised engineers & technicians who have sufficient knowledge, experience & training to work safely. Electricity is dangerous! Any work on electrical systems must only be undertaken by those who are professionally competent to do so.

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