Three-phase line chokes 4%


This design of chokes is mostly applied in three-phase power transmission inverter systems. These reactors limit the inrush current and restrict a mutually interference of inverters, which are supplied from the same transformer. The commutation in systems with motor chokes proceeds softly and overvoltages are suppressed.
Line chokes ED3N are simultaneous protective elements limiting the harmonics propagation.
In the table are given data for rated voltage 400V. During the operation the measured voltage drop is 4%. The value of phase inductance [mH] can be calculated by an equation :


ΔU% - voltage drop in % resulting from the choke inductance
Un - rated phase-to-phase voltage [V]
In - rated current [A]
fn - rated frequency [Hz]

It is possible after prior settlement to produce chokes with other technical data and in various designs.

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
Harmonic number 1 3 5 7 11 13
Harmonic content (%) - I1h 100 0 20 14 0 0
Phase shift 0 0 0 0 0 0
Frequency of 1-st harmonic 50 Hz
Rated voltage Un=400 V
Overload capacity 110%In
Voltage drop 4%Un
Terminals screw terminal blocks or cable lugs or copper bus bars
Fastening by means of angles