By continuing to use this site, you agree to our use of cookies. Find out more
Forum sponsored by:
Forum sponsored by Allendale Jan 24th

Switch gear for 2 speed motor

All Topics | Latest Posts

Search for:  in Thread Title in  
Tom Walker 116/09/2020 08:30:38
45 forum posts
6 photos

Sorry, I posted too quickly, I can see that it is Pole Change.

Clive Foster16/09/2020 08:36:28
2368 forum posts
76 photos

Given that contactors are relatively cheap these days consider fitting a simple change-over switch to control the actuator coils of a pair of contactors. One contactor carries the wiring for high speed and the other the wiring for low speed.

Big advantage for the novice or occasional electrician is that all the wiring arrangements are visible so its easy to trace and verify that its right. No teensy moulded plastic connector identification numbers to struggle to read whilst hoping the invisible innards of the switch are what you think they are.

Standard font for instruction leaflets seems to be 6 point. Not very mature eye friendly. If you get a leaflet. Modern trend seems to be to print on the inside of the box. Dark grey on grey.

Clive

Clive Foster16/09/2020 08:40:06
2368 forum posts
76 photos

John

Thanks very much for the upload. Much appreciated. I have some of it on a rather aged leaflet printed in green that won't scan any sense.

Clive

Brian Morehen16/09/2020 10:29:27
avatar
124 forum posts
11 photos

Hi Tom.

Once again so many ways this can be done , Wish I had Toms Motor on a bench with a few contactor;s so difficult to find the easiest way when you are not there the obvious and easiest is always the last idea that works A simple change over switch and 1 Relay for Slow and 1 for Fast..

Good luck looks like the answer is with you Brian

Mike Poole16/09/2020 10:48:42
avatar
Moderator
2739 forum posts
64 photos

I am not into taking photos but I find the camera on an iPhone very useful for taking a picture of motor plates in difficult to view positions or any other info label for that matter, the zoom on the photo viewer is very handy if I haven’t got my eye crutches with me. Useful in shops too if you want to read a product label. Can be useful for wiring but not always clear where a wire goes so swap one at a time if possible or make a drawing. Lots of specs. now don’t fit wire numbers so Numbered multicore not too bad but panel wiring all same colour and no labels.

Mike

Emgee16/09/2020 11:29:12
1709 forum posts
225 photos

Colchester used the simplest solution, a DOL starter and a pole changing High/Low switch.

Emgee

.bantam 2 speed motor switch.jpg

Tom Walker 116/09/2020 13:38:03
45 forum posts
6 photos

Ah! Anyone got a spare one of Emgees switches?!

John Sykes 116/09/2020 17:14:29
6 forum posts
1 photos

You already have the DOL.

The switch you need is here:

Ebay item no 202953411153 @ £36 delivered.

John

Brian Morehen16/09/2020 18:01:51
avatar
124 forum posts
11 photos

Hi Tom

A three phase motor has 3 leads , connect each of your phases one to each lead and your motor will run if this runs o/k it may be running either slow or fast , which ever it is this will tell you which speed it is running at.

If the direction is wrong change over two of your incoming leads to reverse rotation. al O/k St test complete

disconnect your incoming supply and then reconnect to the other 3 leads your motor will either run fast or slow

2 test complete.,

Your Motor has two sets of windings one for slow and one for fast .

Hope this makes sence if not please come back regards Brian

Tom Walker 116/09/2020 21:43:50
45 forum posts
6 photos
Posted by John Sykes 1 on 16/09/2020 17:14:29:

You already have the DOL.

The switch you need is here:

Ebay item no 202953411153 @ £36 delivered.

John

 

Thanks John, I have one on order.

 

 

Edited By Tom Walker 1 on 16/09/2020 21:52:47

Tom Walker 116/09/2020 21:48:27
45 forum posts
6 photos
Posted by Brian Morehen on 16/09/2020 18:01:51:

 

Hi Tom

A three phase motor has 3 leads , connect each of your phases one to each lead and your motor will run if this runs o/k it may be running either slow or fast , which ever it is this will tell you which speed it is running at.

If the direction is wrong change over two of your incoming leads to reverse rotation. al O/k St test complete

disconnect your incoming supply and then reconnect to the other 3 leads your motor will either run fast or slow

2 test complete.,

Your Motor has two sets of win

or fast .

 

I get that, and that is the kind of "walk him through it" instructions I need!

BUT, according to the motor wiring diagram, you have to link the low speed posts together while in high speed.

 

 

Edited By Tom Walker 1 on 16/09/2020 21:49:22

Edited By Tom Walker 1 on 16/09/2020 21:50:53

Brian Morehen17/09/2020 14:08:28
avatar
124 forum posts
11 photos

Hi Tom Are the following linked together A1 B! C! if so you may have a dual voltage motor , Is there anyone in your area who does motor repairs ? I feel if you take this motor into ther works they will be able sort this out quite easily.

Regards Brian

John Sykes 118/09/2020 10:31:31
6 forum posts
1 photos

Brian:

I think Tom has this sorted . We've established that it's a pole-change two-speed motor, which required a slightly specialised switch to be interposed between the DOL starter & the motor.

John

2 speed sw.jpg

Brian Morehen19/09/2020 18:21:36
avatar
124 forum posts
11 photos

Look forward to a update at Last everything know working O/K

So many ways and possibilities to get this working.

Regards Brian

Tim Stevens20/09/2020 15:22:48
avatar
1268 forum posts

Should you have any problems with the Brooks 2-speed motor I have one which was working a week ago (on a Colchester Student).

Tim Stevens - Knighton (near Ludlow)

Tom Walker 120/09/2020 18:30:41
45 forum posts
6 photos

Hi John, thank you very much for that diagram, it will be a great help when the electrician comes, hopefully early this week.

Re the motor Tim, I sincerely hope I wont need yours, but its reassuring to know there is a good one available if it comes to that. Thanks for your offer.

All Topics | Latest Posts

Please login to post a reply.

Magazine Locator

Want the latest issue of Model Engineer or Model Engineers' Workshop? Use our magazine locator links to find your nearest stockist!

Find Model Engineer & Model Engineers' Workshop

Support Our Partners
ChesterUK
Eccentric July 5 2018
cowells
emcomachinetools
EngineDIY
Warco
Eccentric Engineering
Subscription Offer

Latest "For Sale" Ads
Latest "Wanted" Ads
Get In Touch!

Do you want to contact the Model Engineer and Model Engineers' Workshop team?

You can contact us by phone, mail or email about the magazines including becoming a contributor, submitting reader's letters or making queries about articles. You can also get in touch about this website, advertising or other general issues.

Click THIS LINK for full contact details.

For subscription issues please see THIS LINK.

Digital Back Issues

Social Media online

'Like' us on Facebook
Follow us on Facebook

Follow us on Twitter
 Twitter Logo

Pin us on Pinterest