maybe a little OT: Workshop Air Conditioner Heavily Modified (maybe not for the better)
Unlike my other articles, this one is presenting a problem I am having without a solution. Hopefully one of you will see what I need to do. I have an 11,600 BTU through the wall air conditioner that is unable to efficiently cool my 150 square foot shop.
If you are interested, see
Thanks in advance,
- Excellent question and it has been debated in many circles.
My survey of vendors on the subject came up a and b.
Use the electronic controls to control the motor, you
can wire switches up fairly easily. And for any service
work use a disconnect for safety in the incoming line.
Reasoning is, you lose control of the motor if you just
cut the power. That said, I have used them where the
incoming power was switched when unavoidable. And I've
had authorities require an e stop disconnect for the
motor, but that would be a bed idea except for real
emergencies as the drives don't like the motor spikes.
Brian Worth wrote:
> Hi Folks,
> I have purchased the Yaskawa mini inverter drive for my mill. I just
> have a question about wiring the switch. The supply power is 220v single
> phase, inverter output is 220v 3 phase.
> a) Should I put the switch in the mains line before the inverter?
> b) Do I leave the switch out and simply use the "Run" button on the
> c) Do I wire the 3 pole switch to cut all power between the inverter and
> the motor, leaving the inverter still on?
> Or none of the above? I know the inverter can be set up to brake the
> motor in an instant, but the "run" button is not as quickly accessible
> as a good old switch or panic button. I have searched the manual, but a
> lot of the stuff is foreign to a non-electronics fool like me.
> I would appreciate if someone can help?