Accessory variant: Choke
For use with: Altivar 61 series
Voltage range: 200 to 690 V
Rated current: 30 A
Electrical phases: 3
Length: 155 mm
Width: 170 mm
Depth: 135 mm
Dimensions: 155 x 170 x 135 mm

Altivar AC line choke. A line choke can be used to improve protection against overvoltage in the power supply and to reduce current harmonics of the drive. The recommended chokes can be used to limit the line current. The chokes have been developed according to the EN 50178 standard. The inductance values are defined for a voltage drop between phases of 3% to 5% of the rated line voltage. Higher values result in a loss of torque. The chokes should be installed upstream of the drive. The use of line chokes is particularly recommended under the following circumstances: close coupling of multiple parallel drives, power supply with strong disturbances from other devices, power supply with voltage asymmetry between phases exceeding 1.8% of the rated voltage, drive supplied by a line with very low impedance, installation of multiple frequency converters on the same line, reduction of overload at cos Ø, power correction when the installation has a power factor correction unit.