Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here


Relay Specifications

Relay Specifications

Relay Specifications

Hello everyone,

I am in need of some help with regards to a relay. In the attached drawing, I am not sure of all the requirements of the the two relays between the power supply and the transformer. Must these two specific relays have a dielectric strength of 4800VAC? The power source is not in parallel with the HiPot, but I just want to make sure that I am taking the correct precautions. I do not want my built circuit to fail or possibly catch on fire. Also of note is that the HiPot would only be supplying 4800VAC for about half of a second. Any feedback would be greatly appreciated.


RE: Relay Specifications


The purpose of a Hipot test is to check lower voltage rated circuits for leakage. The tester will most often just pass or fail a circuit I have yet to see anything in between on my megger but I'm sure it happens, it's not likely to cause your circuit to start on fire or do anything dramatic.


RE: Relay Specifications

I forgot to mention to not exceed the voltage rating required for your specific application. I copied this from a hipot manual, you might want to check yours. Typically the "rule of thumb" for an AC test voltage is (2 * operating voltage + 1,000 volts). So if your products operating voltage is 115 volts AC the answer would be (2 * 115) + 1,000 = 1,230 volts. Test voltages may vary depending upon the classification of the product.


Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close