Accessory variant: Choke
Rated current: 10 A
Electrical phases: 3
Length: 155 mm
Width: 130 mm
Depth: 90 mm
Dimensions: 155 x 130 x 90 mm

Altivar AC line choke. A line choke can be used to improve protection against overvoltage from 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 standard EN 50178 (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 supply 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 coupling 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 power transformer that is 10 times more powerful than the nominal voltage of the drive), installation of numerous frequency converters on the same line, reduction of overload at cos Ø, power correction when the installation has a power factor correction unit.