A choke is inductor which blocks higher frequency alternating current in electric circuit. A choke is nothing but a coil of insulated wire wound on a magnetic core. Drive choke is used to reduce the impact of harmonics in variable frequency drive. As variable frequency drive is a non linear load creates harmonics which increases heating of the transformer and reduces capacity of cable and transformer. Input choke is a filter for variable frequency drive and output choke is used for the long cable.
|Types||Three Phase or Single Phase Series choke|
|Range||0.5 – 600 HP|
|System Voltage||0.66/3.0 kV|
|Duty of operation||Continuous|
|Winding Material||Electrolytic Copper|
|Insulation Class||“F” class|
|Impedance||Standard 2% or 3% or As per Specifications.|
Choke is used for the protection against overvoltage on the line supply. It reduces harmonic distortion of the current produced by the drive. Choke also reduces short circuit current.
- Protects drive.
- Reduces Harmonics.
- Reduces Short circuit current.