3 Phase Clamp on, serial output?

I have a 3 Phase supply that I need to monitor (current) on a permanent basis.. Up to 400A per phase. It needs to be a clamp style arrangement.

I've seen the range of Fluke and Yokogawa devices, they seem over the top for my needs, lots of bells and whistles and starting around $2000..

Does anyone have any thoughts on an alternative?

 

Given that you're talking about seeing $2000+ device, I assume you're looking for something more than just a hand-held clamp meter that allows you to measure the current in individual phases?

What about something like this or this?

You might be able to use a much smaller unit by cascading CT's together. If you drop your 0-400A down to 0-5A then you'd only need a unit capable of 0-5A. You'd have to do a quick calculation to turn the reading into the real current however.

 

CT's are what you will use.

You then need to understand what type of output you need, 4-20mA, 1-5V, other and get the gear approriate for it.

We have lots of CT's here on drives etc and monitor them 24x7 in the control system.

Mick

 

Thanks Guys, a few options.. I'll let you know what we go with.