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Info on weird current transformer

Hi, i am currently analyzing a three phase compounding current transformer, used in a generator field excitation system. It is very unlike normal metering CT, which is basically a coil around a big conductor, this thing consists of thick copper primary coil and 2 secondary coils on each side of the primary, wrapped around a big laminated iron core. There are three primary turns and 16&3 secondary turns. The primary turns are connected at the neutral side of the generator.

Has anyone got some info (or maybe patents) on this kinds of CT's? Help will be appreciated.

CT Photos:

http:/members.home.nl/damellema/ct_front.JPG http:/members.home.nl/damellema/ct_top.JPG http:/members.home.nl/damellema/ct_bottom.JPG

Exciter schematic:

http:/members.home.nl/damellema/CS4.PNG

Reply to
a3aan1111
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It could be that it is not a transformer but a magnetic current measuring device, the sort that can measure the exact current curve....including DC and DC levels.

What happens in a simple DC device is that the magnetic field induced by the primary current is neutralized by a secondary coil (which is driven in a closed loop circuit connected to a hall switch which indicates zeroed flux).

The prescence of two sec> Hi, i am currently analyzing a three phase compounding current

Reply to
Roger

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