[SBE] Racking in a circuit breaker

[Thomas Wojciechowski]

All good questions, unfortunately no answers.  The video was forwarded from overseas w/o details.  The only comment that can be inferred is that the incident was not in the USA.  These circuit breakers are cabinet sized and are removed from the housing on casters and wheels.  My guess is the CB was misaligned to start and then jacked (forced) into place. I've seen some work habits that makes one shudder in disbelief.  Like Hill Street Blues - Be careful out there....
 
 



From: info at techworkspro.comTo: sbe at sbe.orgDate: Wed, 15 Oct 2008 13:15:24 -0400Subject: Re: [SBE] Racking in a circuit breakerNot too pretty. Where was it? When was it? Why the H*&* were they working it hot?

On Oct 15, 2008, at 12:00 , Thomas Wojciechowski wrote:

The link below is one of the 'holy &#1*' moments no one ever wishes to participate in.  At first glance the event appears to be part of the DX series of 200 kW transmitters.  Maybe someone else can tell for sure.  The CB's handles 1,200 amps (if memory serves).  Each 200 kW TX can be combined for higher power ratings, I've seen 600 kW but I know there is at least one 1 MW in the Philippines.  The guy is racking in a CB home when *something happened*, wish I knew more.... Be careful out there.... http://radiomagonline.com/Unknown_location_Arc_Flash_while_racking_a_breaker.wmv   "Infinity is everywhere and nowhere"

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