Three-phase starting autotransformers


Starting autotransformers are used primarily in high power drive systems where the switching of the star connection in the triangle connection of stator windings is technically difficult and does not provide tangible results. In the case of start-up transformers the voltage can be arbitrarily lowered at the time of starting the motor, so that the current drawn from the network does not exceed the set value. If necessary, we can produce starting autotransformers with many tappings.

Technical data

Design Three-phase starting autotransformers EA3R are produced in accordance with requirement of standard:
EN/IEC 60726
Insulation class

F(155oC) - standard

Climatic class/Environmental class

C1/E0 - land design; C2/E1 - maritime design

Ambient temperature 40oC
Protection degree IP 23
Protection class I
Frequency 50/60 Hz
Primary voltage up to 1000 V
Secondary voltage up to 1000 V
Fastening by means of angles