The various functions that a harmonic filter performs are enumerated as follows:
- Reduces neutral currents
- Reduces transformer loading
- Protects electrical systems
- Reduces fire hazard
- Protects the neutral conductor
- Enhances system protection
- Minimizes impact on distribution transformers
- Reduces local neutral to ground voltage
- Lowers peak phase current/average phase current
- Increases system capacity
- Decreases system losses
- Improves power factor on non-linear loads
- Reduces total harmonic distortion
- Improves phase current balance
- Augments phase voltage balance
- Reduces three-phase neutral current