The highest rating of Triple pole with Neutral (TPN) MCB main switches available in the local market is _______.

This question was previously asked in
SSC JE EE Previous Paper 11 (Held on: 24 March 2021 Morning)
View all SSC JE EE Papers >
  1. 126 A
  2. 189 A
  3. 252 A
  4. 63 A

Answer (Detailed Solution Below)

Option 4 : 63 A
Free
RRB JE CBT I Full Test - 23
14.2 K Users
100 Questions 100 Marks 90 Mins

Detailed Solution

Download Solution PDF

A triple pole with a Neutral (TPN) Miniature Circuit Breaker:

  • It is used to protect the circuits from short circuit faults. It is used in the place of the fuse.
  • When the amount of electricity is increasing in wire, the MCB turns off and the result is it breaks the circuit.
  • It prevents from burning of home appliances.
  • The current rating of single-pole Triple pole with Neutral (TPN)  MCB main switches available in the local market is 63 A.

Additional Information

A miniature circuit breaker (MCB):

  • It automatically switches off the power supply during overload and faults.
  • This function of automatic switching is accomplished by a bimetallic strip.
  • Whenever continuous overcurrent flows through MCB, the bimetallic strip is heated and deflects by bending.
  • This deflection of the bimetallic strip releases a mechanical latch.
  • As this mechanical latch is attached to the operating mechanism, it causes to open the miniature circuit breaker contacts, and the MCB turns off thereby stopping the current to flow in the circuit.
Latest SSC JE EE Updates

Last updated on May 29, 2025

-> SSC JE Electrical 2025 Notification will be released on June 30 for the post of Junior Engineer Electrical/ Electrical & Mechanical.

-> Applicants can fill out the SSC JE application form 2025 for Electrical Engineering from June 30 to July 21.

-> SSC JE EE 2025 paper 1 exam will be conducted from October 27 to 31. 

-> Candidates with a degree/diploma in engineering are eligible for this post.

-> The selection process includes Paper I and Paper II online exams, followed by document verification.

-> Prepare for the exam using SSC JE EE Previous Year Papers.

Get Free Access Now
Hot Links: teen patti master gold teen patti flush teen patti joy vip teen patti gold old version teen patti gold new version