Line Reactors and Output Filters

Variable frequency drives are great for motor control, but they can send harmonics back into your power system and voltage spikes out to the motor. Line reactors and output filters handle both problems, protecting the drive, the motor and other equipment on the same supply.

Products Available

• Input line reactors – reduce harmonics and protect drives from line spikes
• Output load reactors – limit dV/dt stress on motor insulation
• dV/dt filters – protect motors on longer cable runs
• Sine wave filters – deliver near-sinusoidal output for very long leads or older motors
• Harmonic filters – help meet IEEE 519 limits

Sizing Guidance

Size reactors and filters to the drive's current rating and voltage. Impedance is typically 3% or 5% for reactors. Cable length between the drive and motor is a key factor for output filters. Check the drive manufacturer's recommendations.

Centro can help you choose the right reactor or filter to protect your drives and motors.

Related categories: Motor Control | Variable Frequency Drives | Overload Relays | Configured Drives / Control Systems