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.
How does a VFD reactor work?
A line reactor is essentially an inductor—a coil of wire that forms a magnetic field as current flows through it. The magnetic field limits the rate of rise of the current, which reduces harmonics and helps avoid unnecessary tripping of the drive.24 ago 2016
What is the purpose of a line reactor on a VFD?
Line applied reactors help to stabilize the current waveform, and act as an impedance between the power source and VFD. That impedance will both protect the input section of the VFD and reduce the harmonic current drawn from the power system by the drive.
How do you select Load reactor for VFD?
- Insulation class – look for 200⁰ C insulation or better.
- Expect a minimum of a 115⁰ C heat rise.
- Ask for VPI (vacuum pressure impregnation) construction.
- Reactors should be designed for both line and load side use, with no de-rating.
How do you size a load reactor?
https://www.youtube.com/watch?v=qQ8iJaJaPtA
Do you need a reactor with a VFD?
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.27 abr 2020
How does a 3 phase line reactor work?
Line reactors are electro-magnetic devices which consist of a steel core wrapped with copper coils. The coils form a magnetic field which current flows through limiting the rate of rise of current, reducing harmonics and protecting additional electrical devices.6 jun 2019