Single-Phase and Three-Phase Inductors
Inductors are components used in electrical power lines to improve power factor and for harmonic filtering, current limitation, and oscillation damping applications.
They are employed in various industrial contexts, including power supply for electronic converters, protection of electrical equipment, and power quality control.
For example, inductors are commonly used in variable frequency drive (VFD) systems to reduce harmonics and protect electric motors from current spikes.q
Technical Specifications
Inductors are manufactured in compliance with CEI EN 61558-2-20 standards, ensuring quality construction and safe operation.
- Continuous duty
- Frequency: 50/60 Hz
- Protection against direct/indirect contact: Class 1
- Protection rating: IP00 (IP20 for terminals)
- Maximum ambient temperature: +40°C
- Thermal class: B (130°C)
Application Examples of Single-Phase and Three-Phase Inductors (general overview)
Inductors are commonly used in variable frequency drives to reduce harmonics generated by the switching of power electronic devices. Installed on the supply side (line inductors) or on the motor side (load inductors), they help protect electric motors from voltage and current spikes, improving system reliability and extending component life.
In industrial installations with non-linear loads, such as inverters and rectifiers, inductors are essential elements in passive and active harmonic filter systems.
These devices reduce harmonic distortions propagating through the electrical network, significantly improving power quality and ensuring compliance with electromagnetic compatibility (EMC) regulations.
Unfiltered harmonics cause serious problems in electrical systems. The use of harmonic filters with inductors prevents overheating of transformers, cables, and electrical panels, reduces vibrations in motors, and prevents malfunctions in sensitive electronic devices.
Furthermore, harmonic reduction decreases overall energy losses in the system, optimizing consumption and reducing operational costs.
Inductors can be used in soft start systems to limit the inrush current of electric motors. This solution reduces mechanical stress on transmission components, protects the electrical system from momentary overloads, and improves network stability, particularly useful in contexts with limited available power.
In power factor correction systems, inductors are used in combination with capacitors to correct the power factor and reduce reactive energy drawn from the grid. This configuration optimizes energy costs, reduces transmission losses, and improves overall electrical system efficiency, meeting contractual requirements with the energy distributor.