Distribution Transformer
A transformer stepping down voltage from the distribution network (11-33 kV) to utilization voltage (400/230V) for end consumers.
A distribution transformer is the final transformer in the power system, stepping MV (11/22/33 kV) to LV (400V/230V) for consumers.
Largest transformer population in any power system, typically 25-2,500 kVA. Because energized 24/7, minimizing no-load loss is crucial.
Types: pole-mounted, pad-mounted, ground-mounted, box-type. Can be oil-immersed or dry-type.
QDTB manufactures distribution transformers from 30 kVA to 2,500 kVA in both types, optimized for minimum TOC with ultra-low losses using amorphous core or premium steel.
Related Products
Related Terms
Power Transformer
A large transformer (>10 MVA) used in transmission networks for stepping voltage between system levels.
No-Load Loss
Power consumed when energized but not supplying load, consisting of core losses (hysteresis + eddy currents).
Efficiency Class (IE1-IE4)
International classification for transformer energy efficiency, IE1 (standard) to IE4 (premium) with progressively lower losses.
More Terms Starting with “D”
Dry-Type Transformer
A transformer using air or solid insulation instead of liquid, ideal for indoor applications with fire safety priority.
Dissolved Gas Analysis (DGA)
A diagnostic technique analyzing gases dissolved in transformer oil to detect internal faults before they become critical.
Dielectric Strength
The maximum electric field an insulating material can withstand before breakdown, measured in kV/mm.
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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