Page 2 of 2 FirstFirst 12
Results 11 to 18 of 18

Thread: Any Sparkies on here?

  1. 15th March 2013, 11:09 PM #11
    sheerluck Guest
    Quote Originally Posted by 2stroke View Post
    He just pumped up a circuit breaker... a big one and closed it on a dead short. High fault current driven by a transformer in close proximity on a short fat set of cables made the fiery bit... Copper melts to plasma in an instant and the conductive plasma carries the arc till the breaker or any upstream protection stops it.
    I used to work for a company who manufactured those larger types of breakers, air circuit breakers and moulded case circuit breakers. Anything from 50 amps up to thousands of amps.

    We were given product training, and were shown a number of videos like this, enclosed breakers going bang in a big way. Serious stuff.
    Reply With Quote Reply With Quote
  2. 16th March 2013, 03:37 PM #12
    Homestar's Avatar
    Homestar
    Homestar is offline Super Moderator & CA manager Subscriber
    Join Date
    Aug 2010
    Location
    Sunbury, VIC
    Posts
    20,105
    Total Downloaded
    0
    Got shown that one a while ago at work. We were told he was racking in an earth truck - the bus was supposed to be isolated, but they isolated the wrong one...

    The permit system, or their lack of adherence to it has failed them on this occasion. Testing should have been conducted to prove the bus was dead before they installed the earth....
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.
    Reply With Quote Reply With Quote
  3. 16th March 2013, 11:21 PM #13
    rovercare's Avatar
    rovercare
    rovercare is offline OldBushie
    Join Date
    Jan 1970
    Location
    Yinnar South, Vic
    Posts
    9,943
    Total Downloaded
    0
    Quote Originally Posted by bacicat View Post
    Got shown that one a while ago at work. We were told he was racking in an earth truck - the bus was supposed to be isolated, but they isolated the wrong one...

    The permit system, or their lack of adherence to it has failed them on this occasion. Testing should have been conducted to prove the bus was dead before they installed the earth....
    Modiwark!
    Reply With Quote Reply With Quote
  4. 17th March 2013, 06:12 AM #14
    2stroke Guest
    Haha, funny that when Holcim were bringing in their new arc flash procedures they showed the same one to us and said he energized a breaker. It is on a whole different section to all the other LV gear so might be HV. All our setups have overheads connecting to a tranny outside the MCC and only the LV mains running in.
    Reply With Quote Reply With Quote
  5. 17th March 2013, 07:41 AM #15
    Homestar's Avatar
    Homestar
    Homestar is offline Super Moderator & CA manager Subscriber
    Join Date
    Aug 2010
    Location
    Sunbury, VIC
    Posts
    20,105
    Total Downloaded
    0
    Quote Originally Posted by rovercare View Post
    Modiwark!
    Yep, wouldn't have taken much to prove it was dead - or not in this case...
    If you need to contact me please email homestarrunnerau@gmail.com - thanks - Gav.
    Reply With Quote Reply With Quote
  6. 17th March 2013, 10:23 AM #16
    CraigE's Avatar
    CraigE
    CraigE is offline Moderator Gold Subscriber
    Join Date
    Jan 1970
    Location
    South Yundreup,WA.
    Posts
    7,468
    Total Downloaded
    0
    As said racking in a HV circuit breaker. Now usually done by sparkies. We used to do the racking in and out as part of the isolation of mills years ago. The crack they make normally scare the bejesus out of you let alaone one going wrong like that. Hence all the PPE you must wear.
    2011 Discovery 4 TDV6
    2009 DRZ400E Suzuki
    1956 & 1961 P4 Rover (project)
    1976 SS Torana (project - all cash donations or parts accepted)
    2003 WK Holden Statesman
    Departed
    2000 Defender Extreme: Shrek (but only to son)
    84 RR (Gone) 97 Tdi Disco (Gone)
    98 Ducati 900SS Gone & Missed

    Facta Non Verba
    Reply With Quote Reply With Quote
  7. 17th March 2013, 10:51 AM #17
    oldyella 76
    oldyella 76 is offline Master Subscriber
    Join Date
    Jul 2006
    Location
    Huntly via Bendigo
    Posts
    444
    Total Downloaded
    0

    Gee wiz

    Old saying one flash and your ash!!!!!
    Reply With Quote Reply With Quote
  8. 18th March 2013, 05:52 PM #18
    rovercare's Avatar
    rovercare
    rovercare is offline OldBushie
    Join Date
    Jan 1970
    Location
    Yinnar South, Vic
    Posts
    9,943
    Total Downloaded
    0
    Quote Originally Posted by oldyella 76 View Post
    Old saying one flash and your ash!!!!!
    Red to Red, Black to Black, Blue to bits
    Reply With Quote Reply With Quote
Page 2 of 2 FirstFirst 12
« My old toy box's | Emission's check »

Bookmarks

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Forum Rules

Search AULRO.com ONLY!
 Search All the Web!