The use of devices to convert current from AC to DC has spread to industrial applications. The industry has become a regular user of this type of solution for applications such as variable speed and frequency drives, automation and control systems, HVAC machinery, cold storage rooms, forklifts, pumping systems, LED lighting and, nowadays, electric vehicle charging systems. This technology is a source of harmonics that causes a number of problems in industrial facilities.
These harmonics are circulating currents that are multiples of the base 50- or 60-Hz current, which can cause a series of issues in the electrical installation itself.
The most common effects they produce in industrial facilities are:
- Overheating of conductors, transformers and motors, affecting their performance.
- Trips of protective devices, causing unwanted outages.
- Degradation of insulation in equipment and wiring, leading to premature ageing.
- Damage to circuit boards or communications interference, affecting the production rate.