Autotransformer Stabilizer Calculator

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Enter the tap voltages for the tapped (autotransformer) winding, the target output voltage, and the load rating. Add an auxiliary winding for relay and control circuit power. Relay selection logic between taps is handled outside this tool.

01

Tapped winding taps

Example: 260, 240, 200, 160 V. There is no separate secondary - the tapped winding itself is switched to hold the output near target.

02

Output requirement

03

Auxiliary winding (relay / control supply)

This is a separate low-voltage winding on the same core for powering the relay and control circuit only - it is not a load output tap.

Advanced settingsOptional - automatic values are suitable for beginners
04

EI core, material and stack

05

Tapped winding wire thickness (SWG)

Change any value after calculation to recalculate automatically.

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