what is Deferent between OLTC and OCTC

Transformer manufacturer and Testing in this side all type questions and answers

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There are two types: 1- ON load ( changing while in service ) the process describe in the phrase: Make before break. Two resistors used in the process. 2- OFF load ( must be switched off from the network to change the tap ). If the tap changed while energized, a short circuit current will be generated between the coils.

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