Any electrical/electronics gurus?

[Myweepony]

Good morning people.

I need some help, please.

I want to make a variable speed controller for various 240v electric motors.
I have a controller that describes itself as a 10000w SCR digital voltage regulator/speed control/dimmer. It's got 4 terminals Live in/Neutral in and Live out/Neutral out. Simple enough, but I want to add a 3 position switch (6 terminals DPDT), l O ll, so that I can bypass the controller(full power), switch it off, or go through the controller(variable speed). Switch it off, no problem, no wires to hook up. Variable speed, no problem, L/N from switch to L/N input, L/N output to motor.

How do I wire the bypass? I have a feeling splicing the L/N from the switch into the L/N output of the controller might not be advisable. Putting 240v up the jacksie of the controller doesn't seem to be a good idea.

How would you guys do it? I haven't found anything on U tube that includes the switch. I don't have any circuit diags for the controller.

Would it be the case to add a relay in the output wires to isolate the controller and wire in the full power after the relay?

Any help will be appreciated, especially if you can manage a wiring diagram.

Thanks
Phil

Sponsored

 

[Chappers]

Good morning people.

I need some help, please.

I want to make a variable speed controller for various 240v electric motors.
I have a controller that describes itself as a 10000w SCR digital voltage regulator/speed control/dimmer. It's got 4 terminals Live in/Neutral in and Live out/Neutral out. Simple enough, but I want to add a 3 position switch (6 terminals DPDT), l O ll, so that I can bypass the controller(full power), switch it off, or go through the controller(variable speed). Switch it off, no problem, no wires to hook up. Variable speed, no problem, L/N from switch to L/N input, L/N output to motor.

How do I wire the bypass? I have a feeling splicing the L/N from the switch into the L/N output of the controller might not be advisable. Putting 240v up the jacksie of the controller doesn't seem to be a good idea.

How would you guys do it? I haven't found anything on U tube that includes the switch. I don't have any circuit diags for the controller.

Would it be the case to add a relay in the output wires to isolate the controller and wire in the full power after the relay?

Any help will be appreciated, especially if you can manage a wiring diagram.

Thanks
Phil

I deal with 25kV OLE for trains so its a bit different but i also do 12v DC circuits as a hobby. i think you'll need the following set up with a 3 position DPDT switch: you'll need to make sure the switch is rated for 240v and the amperage that your circuit is using.

 

[Myweepony]

I deal with 25kV OLE for trains so its a bit different but i also do 12v DC circuits as a hobby. i think you'll need the following set up with a 3 position DPDT switch: you'll need to make sure the switch is rated for 240v and the amperage that your circuit is using.

Thanks for that Chappers. I shall bear it in mind if my solution doesn't work. I've ordered the bits as I posted a few days ago and wasn't getting any replies.

I have 3 pos DPDT switch rated for 240v but it only has 6 connections on the back, the controller, and a 2 pole contactor/relay that's Normally Open 240v rated with 240v coil.

My plan was to have live/neutral connected to the middle connections of the switch(off).
Live/neutral from one side of switch to live/neutral input on controller and to coil on relay and live/neutral output from controller to live/neutral input on relay. Live/neutral output from relay to motor(variable speed).
Live/neutral from second side of switch to live/neutral output of relay and then to motor(bypass).

I think that will work and the relay means there will be no back feeding of the controller.

If anybody thinks that's not safe, please shout out.

Once again, thankyou Chappers.

Sponsored