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#123803 - 05/12/06 07:05 PM Mega-Shredder
Trumpy Offline

Registered: 07/05/02
Posts: 8211
Loc: SI,New Zealand
Photo's and info submitted by Alan Nadon:

They are pictures of the largest metal shredder in America.
The machine is 500 feet long and four stories high.
The primary service is 138 KV, 400 amp.
It steps down to 4,160 V for the different parts.
The major drive motor is 7,000 Hp
It shreds whole automobiles, tires and all, at the rate of six a minute or 16,000 a week.
The residue is sorted by blowers and electromagnets for salvage.
It is the largest project that I have ever had the opportunity to inspect.
They started the project last fall and it is now in operation.

Let's face it, these days if you're not young, you're old - Red Green grin
Tools for Electricians:
#123804 - 05/12/06 09:42 PM Re: Mega-Shredder
Scott35 Offline

Broom Pusher and
Registered: 10/19/00
Posts: 2707
Loc: Anaheim, CA. USA
What a cool project!!!

Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!
#123805 - 05/13/06 02:29 AM Re: Mega-Shredder
briselec Offline
Registered: 12/28/05
Posts: 141
Loc: Brisbane, Australia
Interesting stuff! Thanks for sharing
#123806 - 05/13/06 02:32 AM Re: Mega-Shredder
togol Offline
Registered: 09/15/05
Posts: 421
Loc: NW In. USA
16,000 a week !! I"ll bet those neighbors are thrilled...

cool lookin contraption nonetheless...
#123807 - 05/13/06 02:39 AM Re: Mega-Shredder
Trumpy Offline

Registered: 07/05/02
Posts: 8211
Loc: SI,New Zealand
7000HP motor!.
Is it a 4160V version?.
It is obviously not 240V!.
I'd be interested to see the control gear on this Bad-Boy!.

[This message has been edited by Trumpy (edited 05-13-2006).]
Let's face it, these days if you're not young, you're old - Red Green grin
#123808 - 05/13/06 02:51 AM Re: Mega-Shredder
Alan Belson Offline
Registered: 03/23/05
Posts: 1803
Loc: Mayenne N. France
WOW! Alan, I'd love to see some pics of that motor!!! Any chance of you sneakin' back on some pretext, with a camera?

Alan [the other one]

ps. Don't park too close to the plant!
Wood work but can't!
#123809 - 05/13/06 06:28 AM Re: Mega-Shredder
Alan Nadon Offline
Registered: 03/10/05
Posts: 399
Loc: Elkhart, IN. USA
Unfortunately the motor is not very impressive looking.
It doesn't even look like a motor.
It is enclosed in a box shaped housing about eight feet wide and high and about twelve feet long.
It is about as fancy as looking at a walk in cooler.
It is a 4,160 volt.
Originally it was supposed to be an 8,000 Hp but,the company building it had a problem so they found the 7,000 Hp sitting on a shelf somewhere and substituted it.
The neighbors are happy that the three story stack of junkers has been reduced to below the landscaped berm.
If it was easy, anyone could do it.
#123810 - 05/13/06 07:07 AM Re: Mega-Shredder
iwire Offline
Registered: 01/05/03
Posts: 4391
Loc: North Attleboro, MA USA
so they found the 7,000 Hp sitting on a shelf

Oh yeah 4160 volt 7,000 HP motors can be found anywhere, Home Depot or Graingers.

It's those 8000 HP motors that are hard to come by.

Cool photos, thank you for sending them in.

Bob Badger
Construction & Maintenance Electrician
#123811 - 05/13/06 07:31 AM Re: Mega-Shredder
resqcapt19 Offline
Registered: 11/10/00
Posts: 2148
Loc: IL
If the unit pulls the full 400 amps, then the electricity will cost about $1600 per hour if they are paying 5 cent per kWH.
#123812 - 05/13/06 09:35 AM Re: Mega-Shredder
CTwireman Offline
Registered: 02/07/02
Posts: 840
Loc: Connecticut, USA
There is a facility similar to this one located off of Rt 91 in North Haven, CT (for anyone who is familiar with the area). It has a tiny 4000 HP motor by comparison.

The operartor of the shredder sits in a "bomb proof" control room because of the occasional propane tank that slips through, which does happen with such a high feed rate. (I am sure the facility pictured is no different.) I was told the shredder operator of the North Haven facility has been knocked on his keester a few times because of such mishaps.

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