Accessory variant: Choke
Voltage range: 200 to 690 V
Rated current: 100 A
Electrical phases: 3
Length: 270 mm
Width: 210 mm
Depth: 180 mm
Dimensions: 270 x 210 x 180 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 line current. The chokes have been developed according to the EN 50178 standard (VDE 0160 Level 1 for high overvoltages in the power supply). The inductance values are defined for a voltage drop between the phases of 3% to 5% of the nominal line voltage. Higher values lead to 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 connection of several parallel drives, power supply with strong disturbances from other devices (interference, overvoltages), power supply with voltage asymmetry between the phases exceeding 1.8% of the nominal voltage, drive supplied by a line with very low impedance (near a transformer 10 times more powerful than the nominal voltage of the drive), 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.