Hey, I'm hoping this is an easy question. I know this isn't probably the best internet board for this question, but it all comes together using an Arduino to automate all the operations, and I have to know what to wire this as, to utilize it.
The white and blue breaker on the left, pretty clearly shows 400v and when looked up, says it's a 3 phase breaker. The contactors are also 3 phase contactors...
But there are only 2 poles on the breaker...
Anyone have any thoughts on this? I'm not the electrician on the project (thank goodness) - but he's unbelievably hard to reach, and I'm in the Caribbean, where options are limited. Hoping for some insight.
We need some additional information.
Post your sketch, well formated, with well-tempered comments and in so called code tags "< code >" and a detailed circuit diagram to see how we can help.
Have a nice day and enjoy coding in C++.
Thanks for the detailed response. The small guage wires coming out of the contactors and breaker (top and bottom) are for the trigger controls. They route to the door of the unit which has a custom micro-controller and an arduino setup.
This unit is Chinese, the owner ordered it from China and most of the schematic is in Kanji. Does that change anything?
There is currently no wires coming from the top of the breaker. Since it's a 2 phase breaker (is that even a thing in the EU / UK or USA?) The "plug" came with it is a 3 phase 5 wire similar to a yacht shore power plug. Circular with one large peg and 4 small ones. Standard wiring on that from the wall.
You can certainly run 3-phase wires into a cabinet and use only 2 of those phases to run the system. My company originally had a wave solder machine that ran on 3-phace power. When I junked the machine, I discovered one of the heating elements was burned out and the previous owner rewired the heating system to run on only 2 of the three phases. Ran for years that way.
But, if your chiller actually has 3-phase motors, they will not run on 2 phases power.
Look at the name plates on the motor for the compressor and for the pump.
I received a wiring diagram from the manufacture, does this make sense given the picture above? It still looks to me that there is 3 phase coming into QF(breaker) but the picture only has 2 poles…
Ahh, I gotcha. Yea I subscribe to that as well. My voltage comfort tops out at about 24 DC.
I’m not actually wiring this though. The short backstory is, this is an industrial chiller. The compressor and circulation pump run from the mains pictured. The control board does also. My job is various, and a lot less dangerous, but it overlaps these circuits in ways.
I’m also in the Caribbean, the electrician hired to come connect it all won’t be here for another 4 weeks, and I can do 95% of what I need to do, if I can understand what is happening inside this electrical box.
