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Why isolation tranformer used in mcc panel?

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Question added by muhammad arif , Assistant Engineer , Phoenix armour
Date Posted: 2013/11/24
muhammad arif
by muhammad arif , Assistant Engineer , Phoenix armour

Isolation transformer at MCC are usually Y-Delta connected, so a fault on low voltage Y side would not travel towards high voltage delta circuit, so providing isolation to HV side

Hassan Jaber
by Hassan Jaber , Senior MEP Manager , Matta & Associes, Jordan

  1. The provided answer is not totally accurate. Yes, an isolation transformer is used to transfer the electrical power from an AC source to some equipment or control circuit while isolating the powered device/ circuit from the power source, i.e. isolating the secondary side from the primary side, and this is for safety reasons. The isolating transformer has a dual winding, contrary to single winding transformers. An isolating transfer may be400V/230V, or230/230V, or230v/24v ect.. and not necessarily a star delta connected.

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