LT MOTOR

Oh, 100kW?

Used anywhere in the world?

The biggest I have ever worked on was 1500HP (1,100kW) at 480V. But I just heard that A-B is about to release a new version of their drives that will go to 2,000HP (1500kW) at 400/480V in the last part of 2012, so there must be a market for it.

Don't put me down for pulling in the cables.

The biggest 415V motor I've worked on was 800HP that was bad enough.

The 1500HP was connected with flexible bus, the braided kind not the "flexi-bar" stuff. Installation wasn't that difficult, but I wasn't paying the bill for that bus. The soft starter was right next to the motor (ID fan on a giant boiler for a biomass generator) so it was at least not a long distance. It was the only large motor at the plant so they didn't want to run it at MV because it meant extra switchgear and another transformer.

I know what you mean though, I did a 900HP 480V wood chipper with cables (I have a picture somewhere that I'll post if I ever find that box). THAT was a lot more difficult...

What is the advantage of having a LV motor of such high capacity instead of having a higher voltage(4.16/6.6/11/13.8kV) motor?.

No advantage really, but for someone who doesn't have any other MV equipment, it can be expensive to add MV distribution equipment to add just one unit and also daunting to have to have a maintenance person on-site who has MV qualification.

On one pump station I did, the pumps (3) were 700HP and they did go with 4160V because they felt is was less expensive, but then the 2 maintenance electricians hit them up for a sizeable raises after they paid for them to go to classes for being qualified on MV work. 6 months later one of them quit because being MV qualified, he was in high demand with other plants. The water dept. engineers said later they regretted that decision.

I have worked on 1500HP, 415V AC Motor.