Three-phase motor chokes


The ED3S three-phase motor chokes are used in converting driving systems of alternating current. Depending on the driving system type that they cooperate with, they have many tasks to fulfill: i.e. ensuring the motor current pulsation continuity and smoothing, limiting short-circuit current in the converter load circuit, as well as suppressing the commutation over-voltages and the supply line capacity compensation.
It is possible to manufacture the chokes with various coil terminals like screw terminal blocks, cable lugs or copper bus bars, depending on the rated current.
The table presents selected parameters only for some of the chokes manufactured. The inductance values were selected basing on data given by various manufacturers of converters and drive units. If agreed beforehand, it is possible to manufacture chokes with parameters other than those given in the table.

Technical data

Design Chokes are produced according to : EN/IEC 61558-2-20;
EN/IEC 60076-6
Insulation class

F(155oC) - standard

Climatic class
/environmental class

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

Ambient temperature 40oC
Protection degree IP 00
Frequency of the 1-st harmonic 50 Hz
Keying frequency 4 kHz
Rated voltage Un=400 V
Overload capacity 110%In
Terminals screw terminal blocks or cable lugs or copper bus bars
Fastening by means of angles