Make a simple plastic cap to fit over the EHT coax connector with a shaped
lug to operate a microswitch inside the cabinet. When rotated and held in a
keyway the microswitch is operated and EHT supplies are enabled via your
start-up relays. (It could be an opto switch). By the time you've rotated
the cap and slid it back down the EHT coax to get at the connector, the
bleeder should have taken the supply to a *safe* level. Electrical cabinet
switches which allow you to open the door only after disengaging the supply
are a similar situation.
David
G3UNA
> ORIGINAL MESSAGE:
>
> On Sat, 11 Sep 2010 23:11:01 -0500, "Jeff" <jwill@chartermi.net>
> wrote:
>
>>removing a hot conductor from a power
>>supply just because you want to and without any personal safety concerns
>>is
>>in my opinion a real gamble. When working on high voltage I'm never in
>>such
>>a hurry that I cant wait for the bleeder resistors to do thier job and
>>make
>>the B+ connection after the supply discharges.
>
> REPLY:
>
> I agree, but I know that I am not the only person who might be around
> the equipment some time in the future.
>
> My design philosophy is to make things safe enough so that if some
> untrained person does something careless, they can not be harmed.
>
> I realize this goal can never be achieved 100%, but I try to think
> ahead to what someone might do someday and design accordingly. That
> someone could be anyone from a curious child to an EMT or fireman
> responding to an emergency, or maybe just the next owner of the
> equipment. Could be anyone, really. Not just me.
>
> Bill, W6WRT
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