Hi All , I am looking for the solution for my project .I just bought the evaluation power monitoring board from ST its name was EVALSTPM34 and I having the problem on the DC power for the microprocessor on AC line .The 1st picture is my basic connection and the 2nd picture is the schematic for EVALSTPM34 board.
Problem = turn on the AC and DC Isolated power supply ,the isolated DC supply explode while the EVALSTPM34 did not working the bulb remain OFF
Schematic[Metrology Circuit]= I wondering why the neutral and DC ground is connected (refer connector J8 , i measured the resistance neutral-ground is <0.7ohm)
Step taken=
1.testing putting different value of resistor(1M,2.2M,1.5K,600ohm) between Neutral-Ground ,DC part seems working while the AC remain OFF
2.did contact with ST support but they did not answer my question.
Hope You guys can help me to find the best solution for my project thank you
Problem = turn on the AC and DC Isolated power supply ,the isolated DC supply explode while the EVALSTPM34 did not working the bulb remain OFF
Schematic[Metrology Circuit]= I wondering why the neutral and DC ground is connected (refer connector J8 , i measured the resistance neutral-ground is <0.7ohm)
Step taken=
1.testing putting different value of resistor(1M,2.2M,1.5K,600ohm) between Neutral-Ground ,DC part seems working while the AC remain OFF
2.did contact with ST support but they did not answer my question.
Hope You guys can help me to find the best solution for my project thank you