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Old 10-24-2010, 11:18 PM   #1
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Default 220V single phase motor install and wiring

Hello all,

I am putting a new motor in my VN-12 mill.

2 HP single phase 220 volt.

The old starter wiring and blocks are shot...50+ years old

I am starting pretty much from scratch

The mill uses 220V 4 wire ( L1, L2, N, and ground)

It also has a 120 volt X axis feed motor that I am rewiring the controls for.

I could use the advice from some of you sagged electrical veterans.

I need soup to nuts here.....

The new motor is 7 wire with an internal thermal overload.

Any help would be appreciated!

Dave



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Old 10-24-2010, 11:31 PM   #2
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Default Re: 220V single phase motor install and wiring

Post a photo of the name plate and any diagram you may have. Sometimes there are wiring diagrams in the peckerhead (little junction box on the motor). The more info the better.



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Old 10-24-2010, 11:48 PM   #3
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Default Re: 220V single phase motor install and wiring





This would be the high voltage side, on the right

7P2 is the brown line and is the thermal overload wire....which appears to be isolated in this application.

I need this broken down for dummies here....so be gentle....

Dave

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Old 10-25-2010, 12:03 AM   #4
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Default Re: 220V single phase motor install and wiring

Dave,
If you have a 220 4 wire supply the colors should be black red white and green. Which are hot hot neutral and ground in that order.

The voltage should be 220 between red and black and 120 from red or black to neutral and ground.

The red and black are L1 and L2 sp they go to the high voltage combination which leaves one wire not connected to anything.

The 120 circuit can be made with either red or black and white and green goes to the motor frame.

Is there a motor controller in the circuit or a simple on off switch?

Dan

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Old 10-25-2010, 12:04 AM   #5
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Default Re: 220V single phase motor install and wiring

I assume the mill has a drum switch for forward and reverse. Does the switch have a similar drawing?

We are off to a pretty good start.

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Old 10-25-2010, 12:06 AM   #6
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Default Re: 220V single phase motor install and wiring

Hi Dan,

I read and understand all you have said.

That part I know....What controls I need to put in between is the tougher nut to solve...no experience here.

Dave

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Old 10-25-2010, 12:11 AM   #7
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Default Re: 220V single phase motor install and wiring

I have a new drum switch which I purchased from MSC.

I don't have anything else to speak of. ALL NEW!

The drum switch is a ACI CB0170034PL2.

As I see it I need 5 wires coming out of the motor.

I spent some time with a ohm meter on the switch and I can't get it figured out so it works. What I want ...really...is to have a completely dead motor with the drum switch in the off position ( no hot legs)
I would like to keep it as simple as possible, but I am afraid I need a relay.

I am hoping you guys can set me straight.
I'll try to get a diagram for the drum switch...got to get my son down for the night.....

Dave

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Old 10-25-2010, 12:13 AM   #8
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Default Re: 220V single phase motor install and wiring

Hi Dan,

The mill is reversing, and I very rarely do use it in reverse. I would like to keep that feature.

Dave

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Old 10-25-2010, 12:38 AM   #9
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Default Re: 220V single phase motor install and wiring

There should be some sort of paperwork with the new switch. See if you can dig it up and i'll check back tomorrow after work and see if I can draw something up if someone hasn't come up with something for you.

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Old 10-25-2010, 09:18 AM   #10
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Default Re: 220V single phase motor install and wiring

Hi Guys...I'll get the diagram after work...Thanks Guys!

Dave



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