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Transformer Turns Ratio

Estimate secondary voltage from primary voltage and turns.

Safety first, always.

ElectroLab AI teaches theory, low-voltage electronics, and planning concepts. Mains voltage, switchboards, fixed wiring, high-current systems, and legal electrical work must only be performed by licensed electricians where required.

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Primary voltage

Primary turns

turns

Secondary turns

turns

Formula notes

Vs = Vp x Ns / Np

Transformer construction and mains isolation are specialist areas. Do not work on mains transformers live.