[HBR] Caution

[w4thq at cox.net]

Amen - At TVA we always shorted EVERYTHING to ground before touching any circuits.  This was after all tag-outs and locks were in place - Safety First.  And if two crafts were involved there were two locks on all breakers and disconnects.

John, W4THQ

---- rbethman <rbethman at comcast.net> wrote: 
> Gents and Ladies,  (I wouldn't want to leave anyone out!)
> 
> It is sort of like having an Amp Supply LK-500ZB.  You have to remove 
> the cabinet top to adjust the "input" coils to match a 50 or 75 ohm 
> radio into a known dummy load like an oil filled Bird.
> 
> Once that cover is off - you have 3KV VERY "easily" gotten into by 
> accident!  The input circuitry is on the left of the chassis, the PA 
> parasitic suppressors and plate caps are on the right.
> 
> I'm right handed to boot!  I have to shove the LEFT hand into my pocket, 
> and try to REACH *OVER* the exposed 3KV to use an INSULATED alignment 
> tool to tweak each and every band!
> 
> Fortunately, I've only done this once!  I NEVER want to do so again!
> 
> I have ZERO confidence in Plexiglass, Perspex, or Delrin.  I haven't 
> even tried HMWPE (The high molecular weight material based in 
> polyethylene.  Not for 3KV!
> 
> I got bit at age 25 by 13.8KV even AFTER all safety checks, precautions, 
> and procedures had been followed and double checked by my partner.  The 
> stupid circuit was having the voltage "induced" by either the PT 
> circuit, (Voltage transformer), OR by the CT circuit, (Current 
> transformer).  I got my butt tossed about 30 feet.  I was okay, just 
> VERY unhappy!   I remained in the sitting position where I landed, and 
> my partner went and got me a beer after checking me over, and closing 
> the switchgear cabinet.
> 
> Being careful is only ONE facet in the entire equation of *SAFETY* when 
> dealing with High Voltage!
> 
> Bob - N0DGN
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