Square D Motor Logic Plus SSOLR
Square D Motor Logic Plus SSOLR
(OP)
thread238-260801: motor overloads tripping on several motor in New School
These little buggers have a nasty habit of tripping and not showing why. I see SQ-D have an FAQ that gives a small glimpse into what's going on. I would not recommend these for new designs - particularly in remote unattended applications.
ht tp://www.s chneider-e lectric.us /sites/us/ en/support /faq/faq_m ain.page?p age=home&a mp;country =US&la ng=EN& locale=en_ US&red irect=true
These little buggers have a nasty habit of tripping and not showing why. I see SQ-D have an FAQ that gives a small glimpse into what's going on. I would not recommend these for new designs - particularly in remote unattended applications.
ht






RE: Square D Motor Logic Plus SSOLR
This is a long known issue with Sq. D., they have a "work around" but you have to remember to order it with the phase loss feature disabled from the factory, it can't be field altered. They offer that version now on their Pump Panels because a lot of pumps draw very little current on startup with a closed valve, so they would trip off on Phase Loss before the water started flowing.
"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies
RE: Square D Motor Logic Plus SSOLR
RE: Square D Motor Logic Plus SSOLR
Anyway, turns out it WAS imbalance, not phase loss, that was/is the problem. The original tech buletin I had linked to from Sq. D seemes to have disappeared (gee, I wonder why...) but the evidence of this issue lingers on in the description of their "Well-Guard" oil well pump panels. In it, they make mention of the fact that if you order the Class 10 version of the Motor Logic on the Oil Field version pump panels, it is NOT going to have phase imbalance protection. That is a toned down version of the earlier statement that actually explained why. Here is the relevant text from the data sheet:
The "regular" Motor Logic SSOL does include Phase Imbalance protection, and they used to suggest ordering the version without it for Pump Panels. Now it appears they just do it automatically. Side note: the rubber boot thing they added looks to me to be utterly superfluous unrelated drivel, could be a red herring thrown in to confuse the reader.
"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies
RE: Square D Motor Logic Plus SSOLR
RE: Square D Motor Logic Plus SSOLR
"Dear future generations: Please accept our apologies. We were rolling drunk on petroleum."
— Kilgore Trout (via Kurt Vonnegut)
For the best use of Eng-Tips, please click here -> FAQ731-376: Eng-Tips.com Forum Policies