Variable Transformer
A transformer with continuously adjustable output voltage for testing and voltage control.
A variable transformer (Variac) provides continuously adjustable output, typically 0 to slightly above input. Unlike fixed tap positions, provides smooth stepless adjustment.
Types: autotransformer-type (sliding contact on toroidal winding), induction regulators. Applications: lab testing, motor control, lighting, equipment testing.
Provides sinusoidal output without harmonics from electronic controllers.
QDTB manufactures variable transformers from 1-100 kVA in single/three-phase. See also voltage regulators for automatic regulation.
Related Products
Related Terms
More in “Transformer Types”
Autotransformer
A transformer with a single winding acting as both primary and secondary, providing voltage conversion through electromagnetic induction and direct electrical connection.
Amorphous Alloy Transformer
A distribution transformer using amorphous metal core material achieving 60-70% lower no-load losses than conventional silicon steel cores.
Box-Type Substation (Prefabricated)
A factory-assembled compact substation integrating transformer, HV/LV switchgear, and protection in a weatherproof enclosure.
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