I appreciate your concern jreaf, your right about the setup in the picture not doing anything. I think I didn't make it clear that the contactor and OLR are disconnected and power is being passed straight through to a temporary 1/2hp unit. I assure you that it is wired correctly in normal...
I believe this is an ODP design. I also questioned the 40C ambient temp for this use. The rooftop temp here (Arizona) easily exceeds 104F, but I don't think that would cause a breakdown in only two or three weeks.
Some pics of motor and OLR setup. Currently a 1/2hp fan is being used in place of...
Here's the motor nameplate and tag on the hood unit. I hope to get better pictures of motor and hood tomorrow.http://files.engineering.com/getfile.aspx?folder=912d1f0a-c945-45e0-a21f-4ce3b38fd79f&file=004.jpg
skiier
This is a cooking hood. The hood, fan, Ansul system and temp switch were all provided new 12/08 by the same company. I wired the temp switch and wall switch in parallel and supplied power to the hood fan. I'm not an expert on hood systems so if...
Jraef, in my previous question I had thought you were talking about false phase imbalance in the motor. I realize now you were talking about the OLR. Monday I rewired it (one leg in series) and turned it down to 100%, no problems so far.
Skiier, the thermal switch in the hood is normally open...
I think I just found my new favorite forum. I should have caught the OCD as it is often used in reference to me. OLR it is.
Possibility number one could explain the nuisance tripping. I only have current passing through two legs of the OLR. It is an IEC style OLR (Telemecanique LRD21). As for...
Problem
I have had two 2HP single phase dual voltage motors that trip the overcurrent device on startup. The first motor blew the starting capacitor.
History
These are on a hood exhaust fan on a restaurant. The exhaust fan was installed new 12/08. The fan gets turned on at opening runs...
