×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

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

Touchscreen feature on SEL Relays

Touchscreen feature on SEL Relays

Touchscreen feature on SEL Relays

(OP)
Anyone have experience with the added touchscreen feature (HMI) that can be purchased as an add-on feature to many SEL relays?

In my experience most interaction with relays is limited to qualified personal and settings, event reports, etc... are accessed through laptop and relay software. For any immediate diagnostics I've always found the pushbutton navigation features to be manageable.

To me addition of touchscreen feature adds another component in relay that can fail and also may invite unwanted personal from interacting with relay.

Interested to hear pros/cons from anyone that has experience with this feature.

RE: Touchscreen feature on SEL Relays

I did a relay upgrade at a peaker plant last fall. Primary gen protection was SEL-300G, backup was 700G with touchscreen. All the old analog meters were removed from the panels. The 700G was also the autosynchronizer, which has a dedicated screen showing the sync window. Having the HMI available at eye level from the 700G was extremely valuable during initial startup, dummy syncs and during AVAR tuning. The HMI has a virtual keyboard, so level 1 and level 2 passwords can be entered with ease. Viewing events, SER, etc is much easier with HMI. In certain utility environments, with represented workers, the PC connection can only be made by the relay techs. Not having that dependency is valuable at times.

Yesterday I started a SEL 735 meter installation at a WWTP. I've set the HMI up in conjunction with the soft buttons on the meter to show events based on PQ triggers. Plant staff can now easily access the SER with the push of a button.

The HMI version has the same PW protection as you would with the serial connection, it's just easier to enter the PW. We don't normally use the HMI option, as all of our devices are SCADA connected and once the device is in service, the need is not really there. The cost, for example on a 751A, for example, doubles with the HMI. If you don't have a station HMI or panel meters, it's a nice feature. As far as failure mode, the HMI could crap out and the relay will still work. It's SEL, so you call them for another free HMI faceplate and you are back in business in less than 15 minutes with a part swap.

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