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RE: Home Auto Turner prize.
- To: <ukha_d@xxxxxxx>
- Subject: RE: Home Auto Turner prize.
- From: "Keith Doxey" <ukha@xxxxxxx>
- Date: Tue, 11 Dec 2001 00:06:27 -0000
- Delivered-to: mailing list ukha_d@xxxxxxx
- Mailing-list: list ukha_d@xxxxxxx; contact
ukha_d-owner@xxxxxxx
- Reply-to: ukha_d@xxxxxxx
Strowger Telephone Exchanges were probably the most dangerous places on
earth.
Huge great lead acid cells the size of large watertanks and busbars that
carried 10 of 1000's of amps. If a spanner was dropped onto the busbars it
would vaporise and take out anyone standing nearby. The batteries werent
fused, they had curcuit breakers that were puled apart with a spring
tension
of greater thn 2 tons so that the contact opened wide enough and quickly
enough to extinguish any arc. (50V DC can generate some impressive arcs).
The circuit breakers had hydraulic dampers and if they failed the force
would rip the breaker off the rack!
Keith
-----Original Message-----
From: Brian G. Reynolds [mailto:brian.g.reynolds@xxxxxxx]
Sent: 10 December 2001 23:16
To: ukha_d@xxxxxxx
Subject: RE: [ukha_d] Home Auto Turner prize.
Blimey, more dangerous than Bomb Disposal!
That is you never hear the bang that kills you! or so they say!
B.
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