Electronics > Projects, Designs, and Technical Stuff

3 phase 4 wire(480V) AC to 12VDC (100mA) power supply for energy metering applic

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capt bullshot:

--- Quote from: Sultanpepper123 on September 09, 2019, 08:19:23 am ---the million dollar question is can i connect these types of modules to a three phase AC input ?.

--- End quote ---

The correct answer is "Yes". Where can I go and collect my million dollar prize?

capt bullshot:
Some hint: If you can't figure out from all the previous posts, just use three of these modules and tie their outputs together, decoupled by diodes. That's a way more safe way.

Sultanpepper123:

--- Quote from: capt bullshot on September 09, 2019, 08:33:10 am ---Some hint: If you can't figure out from all the previous posts, just use three of these modules and tie their outputs together, decoupled by diodes. That's a way more safe way.

--- End quote ---

I got the idea to use the module per phase&N solution , but how can i use only one of those with some kind of clever circuitry ?

capt bullshot:

--- Quote from: Sultanpepper123 on September 09, 2019, 08:37:24 am ---I got the idea to use the module per phase&N solution , but how can i use only one of those with some kind of clever circuitry ?

--- End quote ---

Look up reply #3 and reply #4

ogden:

--- Quote from: Sultanpepper123 on September 09, 2019, 08:16:54 am ---
--- Quote from: ogden on September 09, 2019, 07:55:05 am ---Check TI 3phase meter reference design EVM430-F6779 schematics, theres supply you are looking for.

--- End quote ---

Thanks checked it, as far as i can tell it's non isolated. I'd be thrilled if it had a transformer.

BTW Is there a way to connect something like the IRM-20-12 mentioned above with the 3 phase 4-wire input?

--- End quote ---
Electricity meter do not need isolated supply.

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