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
114 views
in General by (98.5k points)
closed by
If A is cross-sectional area of conductor, the Bus-bar temperature rise in a DG Set is proportional to
1. A
2. 1/A2
3. A2
4. A3

1 Answer

0 votes
by (95.6k points)
selected by
 
Best answer
Correct Answer - Option 2 : 1/A2

Busbar:

A busbar is a strip or bar of Copper, Brass, or Aluminum that conducts electricity within a switchboard, distribution board, substation, battery bank, or other electrical apparatus.

Its main purpose is to conduct electricity, not to function as a structural member.

Temperature rise in the Busbars:

During the short-circuiting, the bus bar should be able to withstand the thermal as well as mechanical stress.

The heat dissipation through convection and radiation during this short duration is negligible

All the heat is observed by the busbar itself.

Formula:

T = K (I / A)2 (1 + α θ) x 10-2  °C / sec

T= Temperature rise per second

A= Conductor cross-section area

α = Temperature coefficient of resistivity at 20° C

K = constant

θ = temperature of the conductor at the instant at which the temperature rise is being calculated.

∴ The busbar temperature rise in the DG set is inversely proportional to the square of the cross-sectional area of the conductor.

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

...