Motor star to delta

[Smouser]

Revisiting this as I need to attempt to rewire another motor.

I never did buy that varnish from Brocott

Ordered a tin from eBay tonight, but then shortly after, I found this stuff.

Sold at Farnell - https://uk.farnell.com/mg-chemicals/4226a-340g/insulating-varnish-aerosol-clr/dp/4262337

It is good for up to 160 degrees Celsius vs the Ambersil 60 degrees Celsius.

The link @Agroshield provided said "insulation temperature ratings are denoted as Class: A = 105°C, B = 130°C, F = 155°C, and H = 180°C."
The motor I am attempting to rewire is a Chinese motor (it will probably get much hotter than the old school British manufactured motors), and it is rated to class F.

Wish I bought the 4226A instead of the tinned varnish now

 

[Ace Paul]

Shellac was the stuff back in the day...

Think it was a film “Beatle Juice”
Made out of crushed Beatles!

 

[Ace Paul]

Somewhere Approx 2013 one of the INFERIOR forums. Some electrical bikes one. Had thread about putting switch on the motor, To switch from star ️ to delta Not sure on your lathe.

Get it up to speed, flick the switch and gets #boost

 

[Agroshield]

Get it up to speed, flick the switch and gets boost

You are describing a star delta starter.

The thread is concerned with changing a motor from star to deta permanently so it can run on 230v three phase not switching between the two.

And shellac is made of a substance secreted by the (lac) beetle, not from the beetle itself.

Nor from any member, alive or dead, of the popular Liverpool beat combo.

And the way they crossed Abbey Road, using a zebra crossing, would reduce their chance of being crushed.

 

[Ace Paul]

And the way they crossed Abbey Road, using a zebra crossing, would reduce their chance of being crushed.

Don’t mean to funny or anything, the Beatle had already passed

 

[Brad93]

Class H is the best insulation and what all repaired/rewound motors should be done to.

I can't remember the stuff we used now but it comes from one of the rewind suppliers.
Always used the amber rather than the clear stuff.

Someone asked what the difference is between electrical varnish and normal wood varnish.

Temperature resistance is one. As above Class H is 180°C.

Secondly, electrical varnish is very thin and 'creeps' down into the windings. I'm not sure if it's just surface tension but it wicks into the windings.

 

[Farside]

Don’t mean to funny or anything, the Beatle had already passed

There's only one left now anyway.

 

[TheBrick]

I managed to get this done but I am having to rewire the entire machine as the door stops etc are bodgeded and there is no e stop. This is a wet weather job!

After doing this I have a small tin of very dark stick varnish "Black anti tracking coil varnish"

If anyone needs some let me know. I am east Dorset ~30 min Dorchester, Salisbury, Southampton.

 

[Smouser]

If anyone needs some let me know. I am east Dorset ~30 min Dorchester, Salisbury, Southampton.

2 days too late, already ordered some.

I am in Amesbury, working in Bovington so would have been an easy pickup.