pikamaps
Newbie level 4
i was wondering how companies who build Energy meters manage to make AC current measurements using shunt resistors and AC voltage measurements using voltage divider circuits safe to use in-spite of the circuit being exposed to direct AC line suuply without any form of isolation.. or do they use isolation? ive gone through a few schematics and i found that they mostly dont go for isolation methods probably for cost saving.
i wish to know how i am to obtain sine waves for both voltage and small value currents (mA range) as my load hardly draws any current. I understand i need to sample the sinusoidal waveforms later and obtain the values for current, voltage and powerfactor. My only concern is obtaining the waveforms safely.
can anyone who has worked with energy meters give me a good idea as to how i am to approach this situation.
thank you!
-pika :grin:
i wish to know how i am to obtain sine waves for both voltage and small value currents (mA range) as my load hardly draws any current. I understand i need to sample the sinusoidal waveforms later and obtain the values for current, voltage and powerfactor. My only concern is obtaining the waveforms safely.
can anyone who has worked with energy meters give me a good idea as to how i am to approach this situation.
thank you!
-pika :grin: