Load Reactors For VFDs
Load reactors are installed on the output side of variable frequency drives (VFDs) to protect motors and downstream equipment from electrical stress caused by high-frequency switching. These devices help reduce voltage spikes, smooth output waveforms, and minimize harmonic distortion generated by the VFD. RSP Supply carries a full line of load reactors from trusted manufacturers like Benshaw, MTE, and TCI.
Long motor cable runs and fast switching speeds can create reflected wave voltages and high-frequency noise that place excessive stress on motor insulation. Load reactors are especially effective in these applications, as they slow the rate of voltage rise and dampen waveform transitions. This protection helps extend motor life, reduce nuisance faults, and prevent premature equipment failure.
Load reactors are particularly beneficial in systems with multiple motors, high-speed drive applications, or harsh operating conditions. By improving power quality at the motor terminals, they contribute to stable operation across the entire drive system. When used alongside other power conditioning components, load reactors help maintain consistent performance and long-term reliability of VFD-driven equipment.
FAQs
Q: What does a load reactor do in a VFD system?
A load reactor reduces voltage spikes, smooths the VFD output waveform, and protects motors from high-frequency switching effects and reflected wave voltages.
Q: Where is a load reactor installed?
A load reactor is installed on the output side of the VFD, between the drive and the motor.
Q: How is a load reactor different from a line reactor?
A line reactor is installed on the input side of a VFD to protect the drive from power supply disturbances. A load reactor protects the motor from the VFD’s output characteristics.
Q: When should a load reactor be used?
Load reactors are recommended for applications with long motor leads, high-speed switching, multiple motors, or where additional motor protection is required.
Q: Do load reactors improve power quality?
Yes, load reactors improve power quality by reducing harmonic distortion, limiting voltage stress, and stabilizing current delivered to the motor.
Why Buy Load Reactors from RSP Supply
RSP Supply offers a comprehensive selection of load reactors designed to protect motors and improve power quality in VFD applications. Our products support a wide range of motor sizes, system configurations, and industrial environments. Customers rely on RSP Supply for trusted manufacturers, technical expertise, and dependable solutions for motor protection and drive system reliability.