Connection and Installation of Frequency Converters for Electric Drive Units
Modern electric drive units require proper power supply and voltage control, which are provided by frequency converters. These devices also allow connecting electric drives from three-phase power to single-phase networks (when switching the motor from star to delta), maintaining useful power unchanged.
Installation Requirements for the Frequency Converter
The location for installing the converter must meet certain requirements:
- 1. Avoid direct sunlight on the device.
- 2. Install it away from flammable liquids.
- 3. There should be no oil droplets, dust particles, or metal shavings in the installation area.
- 4. Ensure good ventilation.
- 5. The air temperature should be between -10 and +45 degrees.
- 6. No water and humidity below 90%.
- 7. Avoid wooden structures and flammable materials near the frequency converter.
- 8. Install on a solid, stable surface.
- 9. Do not place the device in areas with electromagnetic interference.
- 10. Mount the frequency converter vertically to allow free movement of cold air.
During Operation
All mechanisms connected to the frequency converter heat up during operation. Depending on the power, the heating may be mild or intense. To ensure effective operation of the frequency converter, it is important to leave free space (at least 10 cm on each side) for air circulation and natural cooling of the device.
Installing the Frequency Converter in a Cabinet
When installing the frequency converter in an electrical cabinet, it is essential to provide effective cooling by placing a fan closer to the device so that the cooled air is directed towards it.
Electrical Connections
- 1. First, connect the grounding wires. The cross-section of the grounding cables should match the cross-section of the network cables.
- 2. Use shielded cables.
- 3. Check the correctness of the connections for the input and output cables.
- 4. The connection to the PE terminal of the frequency converter must be made using a grounding wire.
Connecting the Output of the Converter
- 1. Ensure that when the command "forward" is given, the unit rotates in the corresponding direction. If necessary, swap two phases or adjust the corresponding parameters.
- 2. Do not connect a phase-shifting capacitor to the output circuits, as this may cause malfunctions in the unit and lead to defects in the frequency converter.
- 3. Do not connect the power bus to the output terminals U, V, W, as this may damage the device.
- 4. Avoid connecting an electromagnetic switch or magnetic contactor to the output circuits of the frequency converter, as current surges during operation may activate the protective circuit.
Installation of Control Panel
- The control panel should be connected conveniently between the converter and the automation.
If you have any questions regarding the selection, connection, or setup of the frequency converter, our engineers are ready to help. Just contact us using the phone numbers listed in the contacts section.