- Harmonic currents will lead to excessive heating in the induction motors. This will reduce the load carrying capacity of the motor.
- If the control and the regulating circuits are not properly shielded, harmonics from power ride can affect their operation and malfunctioning can result.
- Harmonic currents cause losses in the ac system and can even some time produce resonance in the system. Under resonant conditions, the instrumentation and metering can be affected.
- On critical loads, torque pulsation produced by the harmonic current can be useful.