Three-phase double-winding transformer

Standard products and special order products

Standard products are available from 300VA to 20KVA.

Custom-made products can be delivered in a short period of time because we produce small to large products at our own integrated manufacturing plant.

Single-phase double-winding transformers up to 20 kVA and three-phase double-winding transformers up to 30 kVA are equipped with a patented screw-up terminal for easy operation.

3RT series Three-phase double-winding transformer

Three-phase double-winding: three-phase, for low voltage, dry type, type A, type B, type H

Three-phase double-winding transformer 3RT

Three-phase 380V, 400V, 440V – 200, 220V

three-phase transformer
connection diagram


3RK series Three-phase double-winding transformer with case

Three-phase double-winding: three-phase, for low voltage, with indoor case, dry type, type A, type B, type H

Three-phase double-winding transformer 3RK

Three-phase 380V, 400V, 440V – 200, 220V

three-phase transformer with case
connection diagram


3SS series Scott-connected transformer Convert from three-phase to two-phase

convert from three-phase to single-phase

On the secondary side, there are two single-phase circuits with different phases of 90°

Scott-connected transformer 3SS

Three-phase 200V – two phase 100V, 100V

Scott-connected transformer
connection diagram


3SS/3SS-W series Scott-connected transformer Convert from three-phase to single-phase

convert from three-phase to single-phase

On the secondary side, there are two single-phase circuits with different phases of 90°

Scott-connected transformer 3SS-W

Three-phase 200V – single phase 100V, 0, 100V

Scott-connected transformer
connection diagram


3SV series Inverted V transformer Convert from three-phase to single-phase

On the single-phase side, there are one single-phase circuit

Among the currents on the three-phase side, the V-phase current flows twice as much as the others, so make the wire size larger only for the V-phase.

Inverted V transformer 3SV

Three-phase 200V – single phase 100V

Inverted V transformer
connection diagram


3SV-W series Inverted V transformer Convert from three-phase to single-phase

On the single-phase side, there are one single-phase circuit

Among the currents on the three-phase side, the V-phase current flows twice as much as the others, so make the wire size larger only for the V-phase.

Inverted V transformer 3SV-W

Three-phase 200V – single phase 100V, 0, 100V

Inverted V transformer
connection diagram


3ST series Three-phase double-winding transformer

build-to-order product

Three-phase double-winding: 500VA ~ 500KVA dry type, type A, type B, type H

Three-phase double-winding transformer 3ST

Ordered voltage – Ordered voltage

Three-phase double-winding transformer


3SK series Three-phase double-winding transformer in an indoor case

build-to-order product

Three-phase double-winding: 500VA ~ 500KVA dry type, with a indoor case, type A, type B, type H

Three-phase double-winding transformer 3SK

Ordered voltage – Ordered voltage

Three-phase double-winding transformer in an indoor case


BK/HK series transformer case for single-phase or three-phase transformer

transformer case BK

only for indoor use

Three-phase double-winding transformer in an indoor case