Lust LTI Drives EMC100.1 Network Filter

The Lust LTI Drives EMC100.1 is a network filter designed for industrial drive systems. It is rated for 3x 100 A and is installed on the supply side of the drive to reduce electromagnetic interference. The filter supports compliance with EMC requirements and helps protect sensitive equipment on the same network from conducted noise generated by the drive. It is intended for cabinet mounting and for use with compatible LTI drive controllers.

Function and Purpose

Drive systems use fast switching power semiconductors, which generate high frequency noise on the supply cables. This noise can interfere with other equipment, communication networks, and radio reception. The EMC100.1 filter attenuates this noise by providing a low impedance path for high frequency currents and by blocking their propagation back onto the supply network. This supports compliance with conducted emission limits and improves the electromagnetic compatibility of the installation.

Construction and Design

The filter contains inductive and capacitive elements arranged to form low pass filter stages. Common mode chokes reduce noise currents that flow in the same direction on all phases. Differential mode chokes and capacitors reduce noise that flows between phases. The components are housed in a metal enclosure that provides mechanical protection and shielding. Terminals are sized for the rated current and for the connection of supply and drive cables.

Electrical Characteristics

The 3x 100 A rating defines the maximum continuous current per phase that the filter can carry. The insertion loss characteristics describe how much the filter attenuates noise at different frequencies. The voltage rating must be suitable for the supply voltage of the installation. The filter is designed to handle the inrush current and the short circuit current that can occur during normal operation and during faults.

Thermal Considerations

Current flowing through the filter produces heat in the windings and in the capacitors. The filter is designed to dissipate this heat through its surface and through the mounting panel. In cabinets with several filters or drives installed close together, forced ventilation may be required. The ambient temperature must remain within the specified range. The filter should not be mounted near temperature sensitive components.

Installation Guidelines

Mount the filter close to the drive input and keep the cable between filter and drive as short as possible. Connect the supply to the input terminals and the drive to the output terminals. Observe the correct phase sequence. Use cables sized for the rated current and tighten terminals to the specified torque. Ground the filter housing to the cabinet ground with a low impedance connection. Route power cables away from signal cables.

EMC Compliance

Installations that include drives must meet electromagnetic compatibility requirements for both emissions and immunity. The EMC100.1 filter addresses conducted emissions on the supply side. Correct installation, shielding of motor cables, and proper grounding of the cabinet are also required to achieve compliance. The filter should be selected according to the drive current and the required attenuation level.

Applications

The EMC100.1 is used in packaging machines, printing equipment, textile machines, handling systems, and general industrial drives. It is particularly useful where the drive is connected to a supply that also feeds sensitive equipment, or where several drives operate on the same network. It is also used in installations where EMC limits must be respected for regulatory reasons.

Maintenance and Service

The filter requires little maintenance. Periodically inspect terminals for tightness and signs of overheating. Check the capacitors for swelling or leakage. Verify that the mounting is secure and that cooling paths are not blocked. If a filter is replaced, confirm that the current rating and attenuation characteristics match the original.

Selection Considerations

Select the filter according to the drive input current, the supply voltage, and the required attenuation. Confirm that the continuous current rating is sufficient for the application. Check that the thermal design of the cabinet can accommodate the losses of the filter. Verify that the installation meets the EMC requirements of the machine and the applicable standards.

Conclusion

The Lust LTI Drives EMC100.1 is a 3x 100 A network filter for industrial drive systems. It reduces conducted emissions, supports EMC compliance, and protects sensitive equipment on the supply network. With correct selection and installation, it contributes to stable and compliant operation of the machine.