Hello!

look at my attached image.

This Connection gives wrong current on CT1 secondary winding. As soon as I disconnect CT2, CT1 gives correct magnitude of the secondary current.
What am I missing here?

 

CT2 is driving into a dead short as drawn, you are aware of that correct?

Ron

 

CT2 is driving into a dead short as drawn, you are aware of that correct?

Ron

I have short-circuited the secondary of CT2 intentionally to minimise the burden.
For example: 5 A -> 1A with CT1 and further 1A -> 1 A with CT2 which I measure with an ammeter.
The problem is that the value on CT1 secondary is much lower than 1A ( if I have 5 running in the primary) as long as CT2 is connected

 

Due to inefficiencies in CT2, a dead short (0 ohms), is not reflected across the secondary of CT1. Remove CT2 and short the secondary of CT1.