Question

Series reactors are installed at strategic locations of power systems to:
1. bring down the fault level within the capacity of switchgear
2. directly pass the fault surges to ground
3. pass neutralizing surges of opposite nature
4. discharge the capacitors

Answer 1

Correct Answer - Option 1 : bring down the fault level within the capacity of switchgear

Series reactors:

• Series reactors are mostly used to limit the current and to increase the impedance.
• They are designed for different purposes, such as
  • current limiting
  • neutral/earthing
  • motor starting
  • arc furnace series reactors
  • duplex reactors

 

Classification of series reactors:

• The above classification is based on the location of the reactors.
•  Reactors may be connected in series with the generator in series with each feeder or to the bus bars. They are classified as:
  • Generator reactors
  • Feeder reactors  
  • Bus bar reactors.

 

Series reactors in power system:

Reactors are connected in series with the power system essentially to damp the short circuit fault current. with this, the ratings of switchgear equipment can be reduced.