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Cool Video #58951 11/23/05 10:58 PM
Joined: Feb 2005
Posts: 219
S
sierra electrician Offline OP
Member

Work Gear for Electricians and the Trades
Re: Cool Video #58952 11/24/05 06:38 AM
Joined: Jun 2005
Posts: 821
S
ShockMe77 Offline
Member
Damn.... the second video of that sub-station going up in flames is incredible! Scary stuff.

Re: Cool Video #58953 11/24/05 09:40 AM
Joined: Sep 2005
Posts: 34
K
kdal Offline
Member
WOW !

Re: Cool Video #58954 11/24/05 02:17 PM
Joined: Apr 2001
Posts: 507
G
golf junkie Offline
Member
Cool stuff, thanks for a great link.

Re: Cool Video #58955 12/22/05 07:19 AM
Joined: Dec 2005
Posts: 860
R
RODALCO Offline
Member
Lost for words, impressive video clips. thanks


The product of rotation, excitation and flux produces electricty.
Re: Cool Video #58956 12/22/05 11:41 AM
Joined: Dec 2002
Posts: 308
E
Edward Offline
Member
From what i have understood from my classes is:
In order to open a high voltage and high current switch it must be done extremely fast and the blades of the switch must be rounded. and when closing one it also must close fast.

Right?

Edward


Thanks
Edward
Re: Cool Video #58957 12/22/05 12:20 PM
Joined: Sep 2003
Posts: 650
W
winnie Offline
Member
Edward,

Exactly right. This was discussed in this thread https://www.electrical-contractor.net/ubb/Forum1/HTML/006650.html

The open air links that you see moving slowly are _not_ supposed to interrupt the load, and are not suitable as a switch for these high voltages and currents. The actual switches are in what appear to be insulators on the right hand side of the assembly. One of these failed to open, leaving the visible moving bits to open the circuit...which by demonstration they cannot do.

-Jon

Re: Cool Video #58958 12/23/05 01:55 AM
Joined: Oct 2004
Posts: 806
mxslick Offline
Member
Quote
Damn.... the second video of that sub-station going up in flames is incredible! Scary stuff.

Some notes on that video:

The failure started as stated on the "low voltage" side of the sub, supposedly with a capicator bank failure;

It was not cleared by the substation's protection relay scheme because a $20.00 fuseholder for the relay failed. (That particular brand/type of fuseholder was found to be a problem at substations all over the U.S.);

The boiling oil being shot out of the pressure reliefs caused the major fireball near the end of the video; (it looks like water but there were no firefighters anywhere near that thing during the arcing fault phase)

The blue flash and loud bang is the transformer's expulsion fuse filally blowing and killing the power.

Now after seeing that video how would you like to live next to a substation? [Linked Image] I have a friend here in So Cali who lives next to one and he tells me the noises coming from the sub as breakers and reclosers operate during an earthquake is the stuff of nightmares.


Stupid should be painful.

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