Hi All,
I am building a small off grid system for poultry coops that I am building. I have a 220A Battery Protect for the 24v side of the system. The main output on the 24v side is to a 3kW hydraulic motor. To check the system worked I simplified the setup to check the BP worked. I have a positive battery cable going to a bust bar and then another cable going from the bus bar to the IN terminal on the BP and the OUT terminal goes to a fuse which continues on to the 3kw hydraulic motor. The BP negative is connected to a negative bus bar which is connected to the negative on the battery via the negative terminal on the hydraulic motor as it is on the cabling route to the battery. When I try to operate the pump the contactors start clicking like it would on a starter motor of a car with a low battery and the BP give off an electrical burning smell. The system works fine if I bypass the BP. I have two BP's as I'm build two systems
and I connected the other one to check if it was just a faulty BP. Initially I just connected it up the same way but didn't have it attached to the IP box where all the equipment is mounted. Initially I just heard the contractor click once but then ot seemed to work after a few attempts and continued to work thereafter. The next day I mounted it into the box thinking the problem was solved and when I connected the power the same thing happened as the first one so I don't know if there is an earthing issue within the box or something? The box is mounted to a chassis where the plate that everything is mounted to is technically grounded to the chassis through the bolts that hold the cabinet to the wall. Everything within the box runs back to a negative bus bar within the box that is connected to the negative terminal on the battery via the hydraulic motor negative terminal.
I am not an experienced person when it comes to electrics and would appreciate any help in diagnosis the issue.
I have attached a picture showing the setup when testing.
Thanks in Advance
Colin
