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Andy Neil
02/09/06 09:55
Read: 626 times
Basingstoke
Uk


 
Msg Score: +1
 +1 Good Answer/Helpful
#109622 - Simplest
Responding to: Erik Malund's previous message
Erik Malund said:
1) A relay that open the connection to the load

That sounds like the simplest to me:

Use a relay with a 24V AC coil, connected to the transformer output (before the recfifier).
Then as soon as the mains goes off, the 24V AC goes off, and the relay disconnects the DC out.

You could have a little light connected across the capacitors - that would warn that they still have charge even though the load is off, and would also gently discharge the capacitors!



List of 19 messages in thread
TopicAuthorDate
Discharging capacitors?      U Kaz      02/09/06 09:17      
   sorry I missed that..      U Kaz      02/09/06 09:35      
   many versions have been implemented      Erik Malund      02/09/06 09:40      
      Simplest        Andy Neil      02/09/06 09:55      
         Alternatively...      Hal Albach      02/09/06 12:23      
            Switch      Andy Neil      02/09/06 12:32      
         thankyou      U Kaz      02/10/06 01:39      
            Emergency stop      Per Guldmann      02/13/06 10:21      
            Soft start      Kai Klaas      02/13/06 19:34      
   Combine        Kai Klaas      02/09/06 19:46      
      if it has to be done the right wa      Erik Malund      02/10/06 06:36      
         SPS?      Kai Klaas      02/10/06 07:25      
            if a SPS is a switching power supply - y      Erik Malund      02/10/06 08:13      
      resistor value ??      U Kaz      02/13/06 08:53      
         DIY      Steve M. Taylor      02/13/06 17:02      
            Hmm...      Kai Klaas      02/14/06 20:11      
               the crux      Erik Malund      02/15/06 06:19      
   check current rating of capacitors ...      Frieder Ferlemann      02/13/06 09:13      
      search      Saif Ullah Khalid      02/14/06 09:13      

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