Magnetic Motor Switch Help

[tealetm]

Hi all-

I’m rebuilding a Powermatic planer which has been neglected for a while.

I’m not getting power to the 220v single phase 3hp motor. I’ve bypassed the switches temporarily and have verified that the motor works when power is briefly directly applied. It appears as though I’m not getting power on the load side of the switch. When switched off, there is no power to terminals 2 and 6 (green arrows) and when switch on there is an audible click and then I have 240v to 2 and 6 which seems correct but I never have any reading at the two terminals with the red arrows where the motor leads are connected.

What am I missing here?

 

[wyliesdiesels]

Did you try resetting the overload relay?

 

[LXCam]

The picture looks like you have your black lead from the SO cord wired thru the auxiliary contacts. Am I seeing that right?. But I'm with WD, did you reset the overload block.

 

[tealetm]

Yes- resetting the overload block does not fix the issue (it resets properly)

 

[whateg01]

If you close the contactor manually, does it work? For that matter, does the contactor close when you turn it on normally?

 

[tealetm]

Contactor seems to work fine- clocks in when switched on and also clicks on when manually pressed

 

[tealetm]

Ok a little more info: turns out I have 120 on one motor lead, but the other is dead (which is why I’m not getting 240 to the motor). This terminal should be 120 between it and ground when on but I’m not getting anything.

 

[whateg01]

Well, going back to the contactor, if when the contactor is closed you have a 120 volts on each output then you have a wiring problem. If you have 120 volts on each input but not on each output then you have a bad contactor

 

[wyliesdiesels]

Do you have 240v between both hot legs as they come into the contactor?

 

[Norcal]

If 240V is not present, the contactor will not pull in, since it's pretty safe to guess that the coil voltage is a nominal 240V.