990 Volt Power Meter

You will not find a direct connecting meter of any sort over 600V. What you would do is use what is called a "potential transformer" (or set of them it is 3 phase) that will step that voltage down to 120V or thereabouts and feed the meter, where you program a scaling factor to display correctly. You will need to fuse the PT(s) as well, and have a switch to be able to disconnect them for sevicing.

By the way, 990V is considered "Medium Voltage", there are a lot more rules to consider when working with it. This is NOT a job for an unqualified worker, you are playing with fire. Being you mentioned 480V I can assume you are in the US or Canada. Even if you are a licensed electrician, you need special training to work on equipment over 600V in most areas. This project likely needs to be hired out to someone who knows what they are doing.

Thanks for the response.

It is actually for an earth science project in Alabama. The scientist is going to use the 990V on the secondary to warm up 10,000 feet of wire in a 3/8 diameter stainless tube, and by monitoring the secondary they can calculate different data. There is also a fiber optic cable in the tube that will transmit data on what is going on at different depths. That is why I did not use a PT.

I am one of the lab electricians, and am setting up the experiment, it will be shipped out next month and powered by a generator in a field of cows.

CRAZY scientists

Thanks for the help

This power analyzer should do the trick. It can directly read up to 1,000 Volts & 40 Amps, single or three-phase. There's also an available clamp-on attachment for up to 106 A if your tubular warming oven is a real hog.

Thank you,

This is pretty much what they need. They were hoping for something like and ION or powermatic but I think this will work.

Have a great weekend

Maybe something like this would be better...

http://www.alliedelec.com/search/productdetail.aspx?SKU=70145593

Back to the Future, eh?