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.
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
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.