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Author Topic: Overhead power line tragedy.  (Read 4088 times)

Kevin Graf

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Re: Overhead power line tragedy.
« Reply #10 on: February 20, 2015, 10:30:55 am »

In one of the safety tests of a medical X-ray table, we were required to short the 150kV high voltage power supply.  We hide behind the portable X-ray shield panels and operated the arm by remote control.  In a 200,000 square foot factory it was a very loud gun shot.
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Mike Sokol

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Re: Overhead power line tragedy.
« Reply #11 on: February 20, 2015, 12:01:20 pm »

In one of the safety tests of a medical X-ray table, we were required to short the 150kV high voltage power supply.  We hide behind the portable X-ray shield panels and operated the arm by remote control.  In a 200,000 square foot factory it was a very loud gun shot.

Yeah, when we blew up the conduit coupling it really sounded like a bomb went off in the warehouse. There was a block wall between the arc flash and my electricians and me, but it echoed like crazy in the warehouse and we weren't sure what had happened until we went for a walk to takk a look. It blew a big chunk of the conduit coupling a dozen yards right through a corrugated metal wall. I don't think it would have punched through the concrete block wall, but I don't want to repeat this as an experiment. A 600-amp, 3-phase feeder can make a really big arc flash.
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Mike Sokol
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