Re: Avalon

["Steve Rodway" <legion-at-bigfoot-dot-com> (by way of Terry Fritz <twftesla-at-uswest-dot-net>)]

	You might actually prefer a captive key system such as the UK military
use for HV radar gear, is a central key board, each door to a danger
area has one key which is held captive by lock until the door is closed
and locked. When all the door keys are docked into the key board, traps
all of them and then released the key which enables the main HV feed,
the lock on the HV feed also traps it's key untill it is turned off.

		Steve

Tesla list wrote:
> 
> Original poster: "Gomez ADDams" <gomez-at-netherworld-dot-com>
> 
> I forgot something:
> 
>  Interlocks.  When you're planning how the HV distribution area and controls
> are laid out, you'll want to think about how you'll control access to them,
> and how you'll interlock the feeds.  For instance, you might think about a
> key interlock system such as Fermilab uses- in order to gain access to the
> high voltage test bay (where the big coil lives), or the high voltage
> transformer, or other dangerous on contact items, you have to have a key to
> a door/gate in a chainlink fence or wall.  In order to get the key, you have
> to open a cabinet.  When the cabinet is opened, the power feed contactor(s)
> drop out.  At the gate or door, a tamper-resistant switch also drops out the
> contactor(s), and lights a warning light on the safety board.  The lock on
> the gate should be set up so that the key cannot be removed in the unlocked
> position.  Only one person can sign out a key, and must sign it back in...


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* Steve Rodway                                   Legion Electronics *
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