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

Naming convention for protection relays

Naming convention for protection relays

Naming convention for protection relays

Hi All,

I'm currently updating an ETAP model and I wanted to standardize all protection relays. They are mostly IED's consisting of multifunction relays, for example, ABB RET, REF, REL, etc.
What might be a suggested naming convention for these relays?

Kind regards,


RE: Naming convention for protection relays

Try naming them for the major function that they provide. I.e. 51, 87, 50, etc.
From their use a number that corresponds with a bay or line up, or breaker number, like 521, or 551, or 115WE2-21.

Every company has their own naming convention, so it might be better to find out what is existing at your company, or use the guide for RUS (I believe).

IEEE offers some suggestions in their guide.

RE: Naming convention for protection relays

We ended naming them MF1, MF2, etc. Switching from the vendor specific model to a generic name has made some tasks simpler and other much harder.

RE: Naming convention for protection relays

I use a reference to the line # on the schematic.

Brad Waybright

The more you know, the more you know you don't know.

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


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