What is the purpose of a load reactor?

What is the purpose of a load reactor?

Output (Load) Reactors An output (load) reactor, on the other hand, is used to protect the motor if the wiring distance between the VFD and motor is very long. The drive generates a high frequency PWM three-phase output and noise spikes are generated on the leading edge of these signals.

Do I need a line reactor?

Line reactors come highly recommended by many engineers, and when compared to the price of your motor they are inexpensive and easy to install. Line reactors not only protect your VFD but also protect your motor from disturbances such as transient, voltage spikes and surges.

Is there any difference in construction of a line reactor and a load reactor?

Line applied reactors help to stabilize the current waveform, and act as an impedance between the power source and VFD. Load applied reactors provide a buffer in between the VFD and the motor to temper the waveform and reduce the voltage stress on the motor.

Are line and load reactors the same?

Load reactors are generally used with motors circuits (load side of a motor drive), while line reactors are used in power distribution (line side of a drive).

How does a load reactor work?

Load reactors (also called an output reactors) are installed after the VFD to protect the motor. They can increase load inductance and reduce the effect of reflected waves. If a load reactor is used at the output, it should be located as close to the VFD as possible.

What does a 3 phase reactor do?

Three-phase reactors intended for the attenuation of notches and spikes, reduction of harmonics and limitation of inrush currents in converters and variable speed drives. Drop voltage of 4% of the rated voltage (400V). Manufactured with electrical steel with low losses and copper windings.

What is difference between reactor and inductor?

reactor An electromagnetic device, the primary purpose of which is to introduce inductive reactance into a circuit. inductor A device consisting of one or more associated windings, with or without a magnetic core, for introducing inductance into an electric circuit.

What is a 5% line reactor?

5% Impedance Line Reactor for the use of reducing input line distortion in Variable Frequency Drives helping to prevent damage to the components of the drive. Reduces input line distortion. Eliminates transient and overvoltage nuisance tripping.

What is a 3 phase line reactor?

LINE REACTOR Three-phase reactors intended for the attenuation of notches and spikes, reduction of harmonics and limitation of inrush currents in converters and variable speed drives. Drop voltage of 4% of the rated voltage (400V). Manufactured with electrical steel with low losses and copper windings.

What are line reactors used for?

A line reactor is an inductor that absorbs high voltage microsecond transients that can damage the Variable Frequency Drives running your facility. Line reactors achieve this by slowing the rise time of the voltage spike to keep your VFDs safe.

Why are line and load reactors used on VFD?

We see line and load reactors are often applied on AC variable frequency drives (VFD) without a solid understanding of when and why they should be used. VFDs solve a host of industrial motor control issues, but can introduce power quality problems to the electric grid and/or the VFD-controlled motor.

Why do you need an input line reactor?

Adding an input line reactor helps reduce the creation of harmonics by smoothing out the input waveform. Another reason to add an input line reactor is to help protect the input semi-conductors from transient voltage spikes. This is very important on drive systems that do not utilize an isolation transformer.

How is a reactor different from an inductor?

Essentially a reactor is an inductor. Physically, it is simply a coil of wire that allows a magnetic field to form around the coil when electrical current flows through it. More loops give a higher inductance rating. Typically, a ferrous material such as iron is added as a core to the winding.