9 Oct
2001
9 Oct
'01
10:31 a.m.
Now for real HV - I was told by an ex-electrical
engineer - that he watched while someone
was measuring up for a new HV cabinet with
a tape measure. The usual metal sort you or I
might use for DIY. He dropped it and shorted
out the busbars, instantly melted the tape
and ended up in hospital with major burns
across his arms and chest.
At a place I used to work we were setting up a new raised floor.
The (licensed!) electrician that was setting up the new UPS was
leaning with his hand against one end of the bank of batteries.
He leaned down to tighten the nut on the other end of the bank
of batteries with a metal socket wrench. The UPS was about the
size of four large refrigerators side-by-side, 90% of which was
filled with batteries.
He nearly died and spent quite a long time in the hospital. The
investigation kept the area closed for almost a week.
--
Eric Dittman
dittman(a)dittman.net
Check out the DEC Enthusiasts Club at http://www.dittman.net/
10 Oct
10 Oct
12:03 a.m.
Lead acid batteries can make spectacular short circuits. I
used to advise a group of students working on an HEV.
The battery voltage was 360V, I believe. A student managed
to short the terminals of the output of the main alternator
rectifier (connected directly to the battery) with some pliers.
The pliers fused at the joint and part of them was missing
entirely (vaporized?). The student had a couple of (minor) burns where
molten iron^H^H^H^H metal fell on him. It could have been worse;
fortunately, there were fuses that did blow.
carlos.
At 05:31 PM 10/9/01 -0500, you wrote:
At a place I used to work we were setting up a new
raised floor.
The (licensed!) electrician that was setting up the new UPS was
leaning with his hand against one end of the bank of batteries.
-
He nearly died and spent quite a long time in the
hospital. The
investigation kept the area closed for almost a week.
--
Eric Dittman
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Carlos E. Murillo-Sanchez carlos_murillo(a)nospammers.ieee.org
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