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What is on-load tap-changing?

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Anonymous

9y ago
Updated: 8/21/2019

On-load tap-changing is done in electric power supply systems to maintain the supply voltage to customers within limits.

Tapping is done by switching extra turns in or out, usually on the high-voltage winding of a transformer.

The switching is done by a make-before-break switch to avoid excessive sparking in the transformer, and this enables the switching to be done without interrupting the supply.

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9y ago

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