Name that gear game..

[Vegas_sparky]

I know this wasn't easy, but its pretty neat, so I wanted to share. This is a fairly old 3 PH/480V/1600A Wye start/delta run motor starter. Its used to control a very large motor, which doesn't require a lot of start up torque, and minimize the mechanical shock load when started. If you look at the left/center side of the cabinet, you'll see the resistors which reduce the voltage during starting. After a set time after starting, the feed from the resistor side is disconnected, and switched to the full voltage side for running via the large contactors at the bottom. Nowadays VFDs typically handle the duties for these operations, as they are much more efficient.

No points(even though some of you were close), and anyone can post the next pic. If nothing comes up, I have lots more junk to show.

 

[FullySprinklered]

power supply for the worlds largest electric tankless water heater

 

[Sponsor]

 

[ActionDave]

No points(even though some of you were close), and anyone can post the next pic. If nothing comes up, I have lots more junk to show.

Post your next pic I want another chance.

 

[Vegas_sparky]

What's this?

 

[Ankhseeker]

it looks like a contact plate/rotor assy for a rotating sign. ?

 

[Bluebinky]

I donno, but the phillips head screws on the bearing cap at the top/front and the plastic zip-ties are out of place.

Is this still being used?

 

[Vegas_sparky]

It is still in service, even though it should be in a museum. Ankh is pretty close.

 

[Reach4]

I say elevator controller.

 

[Vegas_sparky]

Jessi and I say you're right, Reach. This old switch is part of the elevator controller at what was the Sahara(now SLS). The mechanics are pretty interesting compared to all of the solid state equipment used today. Between the chatter of the equipment, and all the heat given off, the stairs don't seem so bad. LOL

You get the first point, and a pic for a prize.

You also get to post the next one.

 

[Reach4]

You also get to post the next one.

Sorry I don't have a better one. I just took this one... more electronic than electrical maybe.

 

[JohnfrWhipple]

Finally a show girl.

I was loosing faith in you Vegas.

I was going to guess some kind of control for blinking lights in a slot machine....

I suck at this game.

 

[Kiton]

Jessi and I say you're right, Reach. This old switch is part of the elevator.......

You get the first point, and a pic for a prize..

You posted a second elevator startup switch picture?!!

 

[PatrickH]

Ok I'll give it a WAG. Hmm? It's a 480 volt, 3 ph, forward and reverse motor controller? For an exhaust fan? Pump?

 

[Kiton]

Sorry I don't have a better one. I just took this one... more electronic than electrical maybe.View attachment 25238

Jumper cables, home made.....

 

[Reach4]

Jumper cables, home made.....

The electrical tape to spread the bending area was added, but the probes were included with an instrument.

 

[PatrickH]

Don't know how I wound up commenting on this post. I thought I was commenting on the other enclosure.