ESD Protection for ADC of ADE7758

You should not need external ESD protection. It appears you are using 2 high value resistors as the voltage divider. This may be ok in the application, but our current recommendation is if you use a 1M divide it into 3 330K resistors. for power dissipation and creepage and clearance. 

Dave

Okay, we will not use external ESD protection.
I am designing a circuit for a line-to-line 600V system; am I doing this correctly? I used a 2M ohm resistor voltage divider with a 1k ohm resistor. Please review the schematic.

CT ratio 500:5

The 2Meg is fine, we usually have 1M . I would suggest you take the 2Meg and break up into 500K resistors 4 is series. 

Why 500:5 CT?  Is this an indirect meter? 

dave.smith yes, this is an indirect meter.
I did not choose a 1M ohm resistor because at 600V, the ADC will get 600mV, which exceeds its bearing limit.

Yes, I understand just make sure you make the 2Meg up of 4 at minimum 500K resistors. 

What is the wattage of your 18mOhm resistors? What is the temp Coefficient? Does this meet your requirements over temp?

Dave

At a peak current of 5 amps, the current is approximately 7 amps. For 7 amps, the required power is 0.88 watts, and my resistor’s power rating is 1 watt. I believe this is sufficient because we will not use the full-scale current. In the next revision, we can consider upgrading to a higher power resistor, such as a 2-watt option. Additionally, the temperature coefficient is 75 PPM.

At a peak current of 5 amps, the current is approximately 7 amps. For 7 amps, the required power is 0.88 watts, and my resistor’s power rating is 1 watt. I believe this is sufficient because we will not use the full-scale current. In the next revision, we can consider upgrading to a higher power resistor, such as a 2-watt option. Additionally, the temperature coefficient is 75 PPM.