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Wiring 220 volt contactor

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Mopar14

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Looking for some assistance regarding contactor wiring.
I have a General Bandsaw 90-170B and I've switched to 220 volt. I've swapped the coil on the contactor from 110 volt to 220 volt. I'm not sure whether the wiring will be the same on the contactor.
Does anyone have any experience with this.
I've tried to contact General, but can't get an answer.
Thanks
 

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Norcal

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Do you have a control station (start/stop) on the saw? If the motor does not have overload protection then a overload relay should should be added to the contactor, 3-wire control is pretty much the same if it is a contactor or starter.
 
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Want2race

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I did a video on an install- watch the first 5 min or so.


What is the purpose of the contractor? Trying to avoid a heavy duty switch?
If so then it should be pretty simple. Basic l1 and l2 to the coil via a switch and another pair going direct to the input side of the contractor. Output goes to the saw motor.
 
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matt_i

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Are there any other elements in the circuit panel other than the contactor and the start-stop station?

If those are it, I think you are all done (other than reconfigure motor, see below)

If there is something like a work-light or other device that's controlled its a good idea to check this out as well.

(I'm also assuming you have already rewired the motor for 240vac operation....)
 
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mm08822

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Want2race said:
I did a video on an install- watch the first 5 min or so.


What is the purpose of the contractor? Trying to avoid a heavy duty switch?
If so then it should be pretty simple. Basic l1 and l2 to the coil via a switch and another pair going direct to the input side of the contractor. Output goes to the saw motor.
Click to expand...

The motor has internal overload protection or you have an overload relay to use in conjunction with the contactor?

Are the stop/start buttons momentary or maintained?

If momentary, you want to use 3-wire control to be safer. Not a good application for 2 wire control for safety.
 
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Want2race

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mm08822 said:
The motor has internal overload protection or you have an overload relay to use in conjunction with the contactor?

Are the stop/start buttons momentary or maintained?

If momentary, you want to use 3-wire control to be safer. Not a good application for 2 wire control for safety.
Click to expand...

That would depend on the motor he has. I generally assume it wouldn't but would definitely check.

Again the coil is probably maintained volts but should check the specs on it.
Then again these probably aren't directed at me.
 
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mm08822

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want2race said:
that would depend on the motor he has. I generally assume it wouldn't but would definitely check. that is why i asked the op.

again the coil is probably maintained volts but should check the specs on it. what does this mean??
then again these probably aren't directed at me. ????
Click to expand...

Certain applications are better suited for 3 wire control as compared to 2 wire control.

3 wire control provides low voltage drop-out protection and will not re-start upon restoration of power. Manual overload reset is preffered and having an o/l relay in series to drop out the coil is best. You do not want saws, etc. restarting on their own without operator initiation.
These features are not the case with 2 wire control. For a heater, air compressor, etc. 2 wire control is fine.
 
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Mopar14

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Here's a photo of the schematic for 110 volt provided by the manufactures manual.
So what everyone is saying is that the old wiring configuration is okay for 220 volt?
 

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Norcal

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The indicator light lamp will need to be replaced w/ a 240V lamp, otherwise the lamp will be kaput, although the type of indicator light will dictate the course of action, if it is a transformer type, then it will need to be replaced or use 120 volt control instead of 240V.
 
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wyliesdiesels

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If u want to keep the indicator lamp u would have to have 4 wire feeding it. What kind of wire currently feeds it? NM-b or individual conductors in pipe?
 
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Mopar14

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The indicator light is rated for 440 volts max. Written on the side.
Nm-b currently feeds it.
I wired it as it was before and so far it seems to be running fine. No smoke....no sparks lol
Thanks for all the input folks.
 
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Slupie

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Mopar14 said:
Looking for some assistance regarding contactor wiring.
I have a General Bandsaw 90-170B and I've switched to 220 volt. I've swapped the coil on the contactor from 110 volt to 220 volt. I'm not sure whether the wiring will be the same on the contactor.
Does anyone have any experience with this.
I've tried to contact General, but can't get an answer.
Thanks
Click to expand...

What is on the sticker on the side of your contactor.

You can have a 220v motor contactor with 110v coil.

https://www.automationdirect.com/adc/Shopping/Catalog/Motor_Controls

If you dig through the contactors at the above link you will find a wiring diagram that matches your contactor and possibly your remote control station.

This is what I'm using on my 220V 3Hp PM 66

https://www.automationdirect.com/ad...ctors_-z-_Overloads/9_to_25_Amp/SC-E05-110VAC

https://www.automationdirect.com/ad...tactors_-z-_Overloads/9_to_25_Amp/TK-E02-1800

https://www.automationdirect.com/ad...tors_-z-_Overloads/Auxiliary_Contacts/SZ-AS1T

Fuji contactor wiring diagram on page 2 for 110 VAC coil

https://cdn.automationdirect.com/static/manuals/fujimotorcontrolm/contactor_3nseries.pdf

Fuji contactor wiring diagram on page 2 for 220 VAC coil

https://cdn.automationdirect.com/static/manuals/fujimotorcontrolm/contactor_3nseries.pdf
 
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Norcal

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wyliesdiesels said:
The wiring diagram is a bit confusing to me as the terminals dont use US standard labeling.
Click to expand...

It's a cheap contactor that does not even conform to standard voltages. If it says 110 or 220 volts it's old or ChiCom garbage.
 
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