Electronic Centrifugal Switch

[thelensman]

Hello all! I am in the midst of repairing a Jet bench grinder with a smoked capacitor. I have found the correct replacement capacitor but don't want to install it without replacing the electronic centrifugal switch. The switch is rated at 40a/3s 115vac 50-60hz but I can only find one that is rated at 230vac with all other specs matching. Can I use the 230vac unit? Thanks!

 

[wyliesdiesels]

weird that its rated 40-50hz. US power is 60hz.

what is the voltage rating on the motor?

 

[thelensman]

Sorry, corrected it - 50/60hz 115v

 

[fitter30]

Sorry, corrected it - 50/60hz 115v

No not on 230vac

 

[Cruzan80]

Is the old switch 50/60Hz 115V, and you are asking if you can use a 230V switch as a replacement, or is the old switch 230V and the new switch 115V?

 

[fitter30]

https://www.amazon.com/Intelligent-Electronic-Centrifugal-Compressor-Woodworking/dp/B091T9VDD4?tag=atomicindus08-20

 

[BreeStephany]

If your original centrifugal switch was rated at 115VAC and the new switch is the same switch with a 230VAC rating, it will work fine, the listed voltage and amperage for the switch are the rated capacity of the switch. As long as the rating of the new switch meets / exceeds the ratings of the motor, you will be fine, as after all, it's just a mechanical switch which opens when the motor gets up to speed to disconnect the start winding in the motor.

It's not uncommon, especially when building industrial controls, to use 600V rated components for mechanical contacts, switches, etc, whether they be used in 120V or 277V circuits, as a way of ensuring that they can control a variety of AC environments, as well as ensuring that less rework would have to occur if circuit voltages were to change in the future.

Just my two cents.

 

[fitter30]

If your original centrifugal switch was rated at 115VAC and the new switch is the same switch with a 230VAC rating, it will work fine, the listed voltage and amperage for the switch are the rated capacity of the switch. As long as the rating of the new switch meets / exceeds the ratings of the motor, you will be fine, as after all, it's just a mechanical switch which opens when the motor gets up to speed to disconnect the start winding in the motor.

It's not uncommon, especially when building industrial controls, to use 600V rated components for mechanical contacts, switches, etc, whether they be used in 120V or 277V circuits, as a way of ensuring that they can control a variety of AC environments, as well as ensuring that less rework would have to occur if circuit voltages were to change in the future.

Just my two cents.

Switch he wants is a timing device 3s

 

[larry4406]

Don't know if this thread offers any options for OP. Unfortunately, MBfreak is no longer with us but I remembered his thread and thought it quite clever.

No skills to repair centrifugal motor start switch

The 2 post lift came with a single phase motor with centrifugal switch. Which in a threephase country is an abomination. After some years the switch checked out. Opened motor, removed switch and pulled out the wire for the start winding Installed a 0,5 sec drop out relay feeding the start...

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