×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

*
*
*
*

Thanks. We have received your request and will respond promptly.

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!
*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

Has anybody HI-POT a PLC Control Panel?

thread791-418716

Has anybody HI-POT a PLC Control Panel?

Has anybody HI-POT a PLC Control Panel?

(OP)
One of my clients want me to Hi-POT my PLC Control Panel per their specification.
I have never been requested this before on a PLC Panel. I'm pretty sure a Hi-POT
will damage Electronic Equipment in the panel.

Has Anyone done this before? Do you have to unterminate every wire end to end
to do a Hi-Pot test?


RE: Has anybody HI-POT a PLC Control Panel?

Groan.. idiots abound.

You will have to analyze your entire PLC panel for those things that connect to line voltage gear and after noting the actual specs of those parts of the setup, Hi-POT just them.

Keith Cress
kcress - http://www.flaminsystems.com

RE: Has anybody HI-POT a PLC Control Panel?

Hi R-Roc,
I suspect that they want you to megger, and not hi-pot, the wiring portion of your control system. Even with meggering, you must ensure that anything with an electronic component is completely isolated. Anything not isolated will be almost certainly be toast.
Did you client provide the "hi-pot" potential to which the test is to be conducted to? (ie 300V, 600V, 25kV).
GG

"I have not failed. I've just found 10,000 ways that won't work." Thomas Alva Edison (1847-1931)

RE: Has anybody HI-POT a PLC Control Panel?

(OP)
GroovyGuy,

See attached specification. It silent on voltage range.
I know 14 AWG wire insulation in my panel is only rated for 600V and the Belden cable I have is only rated for 300V.
I might be just megger each and every wire in my panel. If I had known this sooner I would have megger/hi-pot the cable
reel and call that good. To many wires to de-termaintate and re-terminate again.

R-Roc

RE: Has anybody HI-POT a PLC Control Panel?

Hi R_Roc,
I would suggest that a 300V megger would be more than sufficient on 300/600V wiring. You will need to disconnect the field wiring from the I/O cards / power-supplies / etc though. I assume that your I/O cards have some means of bulk disconnect (like a wiring-arm or plug), correct?
GG

"I have not failed. I've just found 10,000 ways that won't work." Thomas Alva Edison (1847-1931)

RE: Has anybody HI-POT a PLC Control Panel?

(OP)
I wish my I/O cards did. My project called for the 1794 Flex I/O family of module.
Luckily I only have 4 modules.

Do you know what the ANSI and Nema Standard requirement is for meggering/over-potential test in my case?

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! Already a Member? Login

Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now
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