[AMPS] Solid-state relay question

[Rich Measures]

>
>Dennis A. Homerick wrote:
>> 
>> Solid state relays have leakage current.  Therefore disconnect from power 
source
>> before inserting hands.  Good advice also with conventional relay.  Almost 
lost my
>> life across a 3 phase 480vac solid state switch.
>
>The design has a 25-amp 250v DPST toggle switch as a safety switch first.  
>Then the relay will be controlled by a couple of smaller toggle switches, 
>interlock, etc. in series.  My practice is always to remove the plug when I'm 
working
>inside an amp anyway.  

€  excellent

> I've heard lots of stories of conventional relays 
>failing to open due to welded contacts, etc.  There's also going to be a 
shorting 
>stick hanging inside the rack and a hook for it on the HV filter cap.
>
€ putting a 100 to 500 ohm, 100w resistor in series with a shorting stick 
might avoid damaging the amplifier.  

-  later, Vic


Rich...

R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures  


--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm