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.

SPECIFICATIONS

Types	Three Phase or Single Phase Series choke
Range	0.5 – 600 HP
System Voltage	0.66/3.0 kV
Frequency	50 Hz
Duty of operation	Continuous
Winding Material	Electrolytic Copper
Insulation Class	“F” class
Impedance	Standard 2% or 3% or As per Specifications.
Cooling	Air Natural