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!

What is the difference between Vrrm and Vrm

  1. Feb 16, 2014 #1
    Hello,

    I know peak inverse voltage is the maximum amount of voltage can block, and that it is the maximum value on the negative cycle of the sine wave. But what is the difference between maximum reverse voltage and maximum repetitive reverse voltage? What does the repetitive imply? Does the former mean the maximum voltage that can be blocked in single wave?
     
  2. jcsd
  3. Feb 16, 2014 #2

    AlephZero

    User Avatar
    Science Advisor
    Homework Helper

    The device can block the maximum reverse voltage just once (and probably only for short time). After that has happened, the device may be damaged so it does not meet the rest of its specification.

    The maximum repetitive reverse voltage can be blocked repeatedly, any number of times, without causing any damage.

    For a rectifier, the normal operating voltage should be less than Vrrm. Usually, Vrm is only relevant if there is a fault, for example if there was a lightning strike that hit the mains power supply and caused a voltage spike.
     
  4. Feb 16, 2014 #3
    Thanks. That explains it very well.
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?
Draft saved Draft deleted