What is a variable transformer (Variac) and how is it different from a voltage stabilizer?

A variable transformer allows manual adjustment of AC output voltage over a wide range, while a voltage stabilizer automatically maintains a constant output voltage and does not usually offer user‑controllable voltage levels.

What input voltages are supported?

Standard models use 110 V or 220 V AC input; 380 V and other industrial voltages can be customized to match local grid standards.

Can the output start from 0 V?

Yes. TDGC2J‑series variable transformers can adjust output continuously from 0 V up to the rated maximum (e.g., 0–130 V or 0–250 V), providing true zero‑start regulation.