All about the damping reactor: its applications and purpose!!

  • 17 Jan, 2020

A damping reactor is mainly connected in series with several capacitor banks. It is created to limit the inrush current while it also has the capability to resist the fault, as well as, the rated current in the event of a short circuit. Damping reactors’ major function is to control the inrush currents that primarily occur during switching, to limit the resonant frequency that takes place due to the addition of capacitor banks, and to control the limit currents due to close-in faults.

During the general operation, the capacitor current flows through the damping reactor, and the maximum permissible or the overload current of the reactor is somewhat equal to the corresponding value of the capacitor bank. Damping reactors are air-core reactors, and when connected in proper series with the capacitor, they reduce the inrush peak current to the components to a specific value that can’t stress or push the insulation. Besides, damping reactors also does not damage the internal connections of the capacitor components, and furthermore, remain connected after energizing the capacitor.

When it comes to usage, damping reactors are perfectly suitable for:

– Outdoor use:

Regardless of what is the available service voltage, make sure to use the appropriate outdoor post insulators for using damping reactors for outdoor use.

– Indoor use:

For using damping reactors indoors, there is absolutely no need for support insulators for up to 12 kV, however, if the voltage is higher, go for damping reactors with support insulators.

On the other hand, with regards to its installation, a damping reactor may be further classified as:

  • Conventional dry type
  • Single-phase or three-phase
  • Oil-immersed
  • Cast resin dry type
  • Variable and fixed reactance
  • With magnetic shield or without magnetic shield
  • With closure or without closure

So, whether you are looking for any type of damping reactor mentioned above, it’s important to choose one that is designed perfectly in accordance with the load current that your capacitor can handle. Also, you must consider the installation purpose and the location where the reactor has to be installed.

Considering these things are important because all these will have a great impact on the working of your reactor. Moreover, the reactor should also be installed correctly at the right place that must be away from the exposure of any type of harmful gas, explosive dust, and electric conductivity.