Sir, temperature is not measured,Mehboob....
What is it's temperature ?
Regards, Phil Corso
I keyed on the saturation of the CT without asking an obvious question. Why do you have an 800/1 CT on a circuit pulling 1200 amps. Is the digital meter calibrated correctly. The CT will output 1 amp with 800 amps flowing through it. Is your digital meter calibrated to display 800 amps when 1 amp is flowing through it?
To me Mehboob has mixed up ratio for power rating.
As with MWO I have had 1amp meters giving in supply max of 800A. But also seen 5A meters which would give a theoretical max of 4,000A. Guessing Mehboob would notice by the size of terminals ! Or is it 100ma meter for a 80A scenario.
Assuming meter calibrated to display 800 amps when 1 amp is flowing through it, the transformer saturation would need considerable overload before saturation occured, how high depends on the transformer.
I recall laboratory practicals energy the CT with open circuit secondaries. The result was early saturation with dangerous spikes which damages insulation which is why never leave a CT with open circuit secondaries. Has Mehboob mixed this up with any of the above ?
Finally I'm assuming this CT is ancient as in pre-1990's. Nowadays we separate power cable from other cores and pass it through a calibrated 'ring' acting as secondary winding, passing the power cable through 1, 2 or 3 times as necessary. I haven't seen large CT's for a long time - that's not to state they are no longer available, as they still have their uses.
On that note, if one changes a CT and does not look at metering. A mistake is made.Always make your metering match your CT output. If your CT is measuring 800 amps is should provide 1 amp to metering. The metering will provide a 800 amp display at 1 amp input.
Therefore, I have no idea what you are trying to figure out.