1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Circuit Breakers

  1. Apr 29, 2010 #1
    Here is my attempt at explaining how a circuit breaker works, is it correct?

    A circuit breaker works due to the residual current - the difference in current going through the live wire and passing out through the neutral wire.

    Normally, the current going in and out of a system is equal so there is an equal attraction of the iron armature to both the lower and upper parts of the system.

    When the system is faulty, the current leaving the system is lower than that entering. Hence the magnetic field of the neutral wire is lower. This means the iron armature is moved out of its position towards the live wire, breaking the circuit.

    Flicking a switch would return the armature to its original position

    q1) is my explanation correct
    q2) how does it differ if the current is to high, or is it the same thing?
  2. jcsd
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Can you offer guidance or do you also need help?
Draft saved Draft deleted

Similar Threads - Circuit Breakers Date
What does W=VIt show? Tuesday at 9:20 AM
Find the charge of Capacitor 2 in the circuit Tuesday at 8:55 AM
Circuit Breakers in practice Feb 8, 2010
Circuit breakers Feb 15, 2009
Circuit breakers and short circuits Nov 30, 2007