The supplier of the energy feedback device for the frequency converter reminds you that there are still some unsatisfactory aspects of the frequency converter under different operating conditions, resulting in a shortened service life and an increase in the installation, commissioning, daily maintenance, and repair workload of its ancillary equipment, thereby causing significant direct and indirect economic losses to users. If people can pay attention to avoiding some misunderstandings and clearing up some erroneous concepts when using and repairing frequency converters, it will be of great benefit to the use and maintenance of frequency converters.
1、 Do not install the frequency converter on equipment with vibration, as the main circuit connection screws inside the frequency converter are prone to loosening, and many frequency converters are damaged due to this reason.
2、 Wiring issue: It is best to connect an air switch to the input end of the frequency converter to protect the current value from being too large, in order to prevent it from burning out too severely in the event of a short circuit. The 'N' terminal must not be grounded. Try not to keep the control line too long. Because this makes the control board susceptible to electromagnetic interference and can cause misoperation, as well as damage to the control board, it is best to use shielded wires for lengths exceeding 2 meters. Do not install high current and frequently operated contactors next to the frequency converter, as they can cause significant interference and often cause the frequency converter to malfunction (displaying various faults).
3、 It is best not to rely on the braking of the frequency converter itself for frequent emergency parking, but to add electric brakes or use mechanical brakes. Otherwise, the frequency converter is often impacted by the back electromotive force of the motor, and the failure rate will be greatly increased.
4、 If the frequency converter frequently operates at low speeds below 15HZ, an additional cooling fan should be added to the motor!
5、 Dust and moisture are the most deadly killers of frequency converters. It is best to install the frequency converter in an air-conditioned room or in an electrical cabinet with a dust filter, and regularly clean the dust on the circuit board and radiator; It is best to blow the circuit board with a hair dryer before powering on a frequency converter that has been shut down for a period of time.