Use app×
Join Bloom Tuition
One on One Online Tuition
JEE MAIN 2025 Foundation Course
NEET 2025 Foundation Course
CLASS 12 FOUNDATION COURSE
CLASS 10 FOUNDATION COURSE
CLASS 9 FOUNDATION COURSE
CLASS 8 FOUNDATION COURSE
0 votes
201 views
in General by (238k points)
closed by
Which one of the following statements is incorrect about shunt capacitors?
1. The VArs produced by the shunt capacitors drop as the voltage drops.
2. Shunt capacitors are used for lagging power factor circuits.
3. Shunt capacitors are used to supply the reactive power required to maintain the voltage value.
4. The shunt capacitors are of variable impedance type loads only to minimize losses and voltage drop.

1 Answer

0 votes
by (240k points)
selected by
 
Best answer
Correct Answer - Option 4 : The shunt capacitors are of variable impedance type loads only to minimize losses and voltage drop.

Static Shunt Capacitor:

  • The power factor can be improved by connecting capacitors in parallel with the equipment operating at a lagging power factor.
  • It is always desired to commission a capacitor bank nearer to reactive load, this makes the transmission of reactive kVARr removed from a greater part of the network
  • Shunt capacitors operate at leading pf (like No-load over-excited synchronous motors)i.e. they consume leading VARs by delivering the lagging VARs.
  • Reactive power supplied by capacitor bank is given by the formula: \(Q = P\left( {\tan \delta - \tan \delta '} \right)\)

Advantages:
(i) They have low losses.
(ii) They require little maintenance as there are no rotating parts.
(iii) They can be easily installed as they are light and require no foundation.
(iv) They can work under ordinary atmospheric conditions.

Disadvantages:
(i) They have short service life ranging from 8 to 10 years.
(ii) They are easily damaged if the voltage exceeds the rated value.
(iii) Once the capacitors are damaged, their repair is uneconomical

Welcome to Sarthaks eConnect: A unique platform where students can interact with teachers/experts/students to get solutions to their queries. Students (upto class 10+2) preparing for All Government Exams, CBSE Board Exam, ICSE Board Exam, State Board Exam, JEE (Mains+Advance) and NEET can ask questions from any subject and get quick answers by subject teachers/ experts/mentors/students.

Categories

...