Product Description:

The 20.Z1.C04-1000 is a sine-wave EMC filter from KEB that belongs to the Z1 Sine Wave EMC Filters series. It is installed between a variable-frequency drive and the motor to smooth the PWM output and limit high-frequency disturbances that could travel along the motor leads into nearby equipment. By using low-pass inductance and capacitance elements, the filter helps the motor receive a cleaner waveform, reduces acoustic noise, and improves electromagnetic compatibility in industrial automation systems. It is well suited to applications where fast switching edges and cable-related interference would otherwise place more stress on the motor connection.

This filter is designed for three-phase systems with a nominal line voltage of 400 V. When connected with conductors up to 35 mm², it can carry a continuous current of 79 A, giving it a power rating of 37 kW at full load. Internal copper windings and core losses create thermal dissipation of 430 W, so the enclosure must provide enough airflow or heat removal to keep temperatures under control. The permissible mains frequency range is 50/60 Hz, which allows the unit to operate on common industrial power systems without changes to its basic operating behavior.

Cabling between the drive and motor may extend to a maximum of 5 m, allowing the filter to stay close to the inverter while still protecting the downstream motor connection. The housing carries an IP20 rating and meets climatic class 3K3, so it is intended for clean indoor areas with controlled temperature and humidity. A steel frame and impregnated windings bring the mass to 72.6 kg, and a width of 388 mm with a depth of 360 mm and a height of 183 mm should be considered when reserving panel space. The indoor mounting arrangement should also account for the unit's physical weight and heat loss so the backplate or support structure remains secure.