Star-delta motor starter

[kwame]

I want a simple guide on wiring of a three phase motor in STAR-DELTA configuration when the line voltage is 240VAC.

 

[KeepItSimpleStupid]

I should have used lmgify.com. but look here: https://www.google.com/url?sa=t&rct...IqnwTEpjbJ6n7zQ&bvm=bv.53537100,d.dmg&cad=rja

You should be able to find a disconnect with most of the stuff wired, but not sure.

 

[dr pepper]

240?, 3 phase is usually 415v.

 

[KeepItSimpleStupid]

We have no idea where the OP is from and it makes it tough sometimes to create an answer to certain questions/

In the US, there is a 208V 3 phase Y system and a 240 V, 3 phase High LEG Delta system See: https://www.ridgidforum.com/forum/t40742/

Resisdential is typically a split-phase 240/120 which is called single phase. The residence is suppled from a center-tapped 240 VAC transformer. The CT is grounded.

 

[kinarfi]

We have no idea where the OP is from and it makes it tough sometimes to create an answer to certain questions/

In the US, there is a 208V 3 phase Y system and a 240 V, 3 phase High LEG Delta system See: https://www.ridgidforum.com/forum/t40742/

Resisdential is typically a split-phase 240/120 which is called single phase. The residence is suppled from a center-tapped 240 VAC transformer. The CT is grounded.

also, the industry standard for office type buildings is 277/480 Y with most of the lighting circuits being 277 1 phase

 

[KeepItSimpleStupid]

Yea, true but our "company" moved from a 240 high leg Delta to a 208 V Y building with 480 Y available as well. We also had German power installed for a tenant. One piece of equipment required 208 V 200 A 3 phase.

That was fun. We did have to change heaters in diffusion pumps to 208 V and the Bozo's thought they knew what they were doing and wired the equipment reacquiring 50 A, 208 V, 1P 4 wire as 50 A, 208 V, 3 Wire. They also made a mess out of the cooling water. Trying to use 100 F cooling water at 10 PSI for systems that needed ground water at 60F and 60 PSI nd needed to go though a 1/4" diameter pipe. Oops.