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Old 04-24-2011, 11:13 PM   #1
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Default Racking in breakers

I haven't had much opportunity to be about big switch gear so have some questions.

What constitutes a hazard when racking a breaker in? Is there a voltage, amperage size where it becomes a hazard? What types of breakers require racking versus just turning them on. As you tell I'm foggy about this. Want to know how to identify that there is a hazard and have an idea of what to do about it.

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Old 04-24-2011, 11:15 PM   #2
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sorry.... what's racking a breaker?

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Old 04-24-2011, 11:16 PM   #3
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I haven't had much opportunity to be about big switch gear so have some questions.

What constitutes a hazard when racking a breaker in? Is there a voltage, amperage size where it becomes a hazard? What types of breakers require racking versus just turning them on. As you tell I'm foggy about this. Want to know how to identify that there is a hazard and have an idea of what to do about it.
What constitutes a hazard when racking a breaker in, you ask? In 2011, I'd say that the simple act of racking in a breaker is the hazardous act, in and of itself. Parts break. Parts don't line up. Things malfunction. Even in the best PPE made, you're still going to get hurt in some way if things go badly. I think the three or four companies that offer remote controlled racking solutions are on the right track.
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Old 04-24-2011, 11:16 PM   #4
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sorry.... what's racking a breaker?
Sticking it in the rack.
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Old 04-24-2011, 11:19 PM   #5
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Sticking it in the rack.
Shoot MD, I guess I didn't understand that. So it is "changing" out a breaker? I had thought it refered to opening and closing the breaker.
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Old 04-24-2011, 11:19 PM   #6
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Shoot MD, I guess I didn't understand that. So it is "changing" out a breaker? I had thought it refered to opening and closing the breaker.
Uh... no. We're talking about breakers that weigh hundreds and hundreds of pounds.

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Old 04-24-2011, 11:21 PM   #7
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Can you define racking in a breaker for me? I'm kinda confused now.
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Old 04-24-2011, 11:22 PM   #8
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I was always under the impression it was in high voltage scenarios where you basically have the enclosed cabinet in the switching gear where you "pump" and the breaker slowly with every movement goes into place.
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Old 04-24-2011, 11:22 PM   #9
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Thanks used you tube but thanks any way
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Old 04-24-2011, 11:23 PM   #10
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Can you define racking in a breaker for me? I'm kinda confused now.
Watch this video: http://www.cbsarcsafe.com/videos/vid...-and-light.wmv
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Old 04-24-2011, 11:23 PM   #11
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I was always under the impression it was in high voltage scenarios where you basically have the enclosed cabinet in the switching gear where you "pump" and the breaker slowly with every movement goes into place.
That was my assumption. I haven't had the oppurtunity to work on this type of gear yet so..
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Old 04-24-2011, 11:23 PM   #12
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Basically, chit happens. And its almost never good for the guy standing or kneeling there cranking on the thing or whatever.


Best and really the only safe way to do it is with remote racking gear IMO.
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Old 04-24-2011, 11:23 PM   #13
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Watching
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Old 04-24-2011, 11:27 PM   #14
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I watched it and it's removing and installing large switchgear. Now I can understand why there would be a hazard while doing live. So instead of calling it installing and removing they call it racking. Got it.
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Old 04-24-2011, 11:27 PM   #15
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I watched it and it's removing and installing large switchgear. Now I can understand why there would be a hazard while doing live. So instead of calling it installing and removing they call it racking. Got it.
Ten-four. Some go so far as to call turning on or off large frame breakers as "racking", but that's not really the case. If it makes you feel good to say that, fine, but don't be surprised if someone gives you a puzzled look.
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Old 04-24-2011, 11:29 PM   #16
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Thanks for straightening me out!
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Old 04-24-2011, 11:33 PM   #17
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Always rack remotely or on a dead bus. When racking goes wrong...
YouTube Video
ERROR: If you can see this, then YouTube is down or you don't have Flash installed.

-John
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Old 04-24-2011, 11:35 PM   #18
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What happened to the guy do you know?
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Old 04-24-2011, 11:42 PM   #19
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duplicate.
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Old 04-25-2011, 05:49 AM   #20
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What happened to the guy do you know?
Far as I remember, he was killed. I think the helper was a female, and she was burned pretty badly.

I also seam to remember he racked the wrong breaker here. the one above had no load on it- but the one he pulled was under full load.

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