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???
11/25/04 17:40
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#81949 - A word of warning
Responding to: ???'s previous message
Joseph Hebert said:
In general, when I want to monitor an AC voltage, I use a capacitive voltage divider


Apa At,

You need to be very careful that your capacitors have the appropriate ratings and meet the appropriate approvals if you're going to connect this to the AC mains supply.

I'm sure Joe understands this, but please be sure that you fully understand before you just connect to the mains...

A suitable transformer could also be used to step the voltage down to a suitable level for measurement, and also provide isolation.




List of 22 messages in thread
TopicAuthorDate
230V AC Monitoring            01/01/70 00:00      
   Re: 230V AC monitoring.            01/01/70 00:00      
      More questions            01/01/70 00:00      
         reply            01/01/70 00:00      
            Use an optocoupler            01/01/70 00:00      
               Why opto?            01/01/70 00:00      
                  picture            01/01/70 00:00      
                     Mains detector            01/01/70 00:00      
                     "Mains"detector            01/01/70 00:00      
                        Earlier detect            01/01/70 00:00      
                           Re: Earlier detect            01/01/70 00:00      
                     Why opto?            01/01/70 00:00      
                        Opto            01/01/70 00:00      
   Capacitive Divider            01/01/70 00:00      
      A word of warning            01/01/70 00:00      
      Reply            01/01/70 00:00      
         Voltage sensing            01/01/70 00:00      
            Step down transformer            01/01/70 00:00      
   Danger!            01/01/70 00:00      
      Peak and RMS: Andy            01/01/70 00:00      
         What?            01/01/70 00:00      
         230 Vrms            01/01/70 00:00      

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