My system comprises a current measuring unit.
Up to now I used a current sense resistor in order to measure load's current:
**broken link removed**
The resistor is connected to a Power Sensor IC.
I'd like to use a current transformer instead of the current sense resistor, so I disconnected the load and the sense resistor, and connected the transformer's output instead of the resistor:
**broken link removed**
In order to measure the Load's current, I inserted the LIVE wire of the LOAD into the transformer's loop.
When the LOAD (60W light bulb) was ON, the system behaved weird, It didnt respond when I pressed its button.
However, when the LOAD was OFF, the system responded to the button pressing.
It seems that the transformer somehow interrupts the system.
Perhaps it corrupts the ground? (The ground in my PCB is the Neutral wire)
What could be the reason for it?
Thank you.