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interMARINE 1-phase transformers are DNV GL type approved

interMARINE 1-phase transformers from range 50VA to 2400VA are now DNV GL type approved Read more »

24.08.2017

StandexMeder Planar transformers and inductors now available!

Energy-efficiency and better performance for devices used in many commercial and industrial applications. Read more »

18.10.2016

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Autotransformer 

An autotransformer contains only one coil, so the primary and secondary sides always have just one conductor between them. The primary and secondary side voltages of an autotransformer do not have galvanic isolation.

Säästömuuntaja periaatekuva

An autotransformer can be built with a significantly smaller frame, if the primary voltage (U1) and the secondary voltage (U2) values are similar.

S2 = Sn x (1-Un / U1)

S2 = secondary side load (VA)

Sn = transformer's nominal power (VA)

U1 = upper voltage (V)

U2 = lower voltage (V)

Intertrafo's autotransformers

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