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Milestones:World's First Reliable High Voltage Power Fuse, 1909

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''In 1909 Nicholas J. Conrad and Edmund O. Schweitzer developed an extremely reliable high voltage power fuse, based on the injection of an arc-extinguishing liquid that assured proper interruption of short circuits. These fuses, later manufactured at this location, played a major role in the adoption of outdoor distribution substations, and the technology remains a central component of electrical transmission and distribution systems today.''<br>
 
''In 1909 Nicholas J. Conrad and Edmund O. Schweitzer developed an extremely reliable high voltage power fuse, based on the injection of an arc-extinguishing liquid that assured proper interruption of short circuits. These fuses, later manufactured at this location, played a major role in the adoption of outdoor distribution substations, and the technology remains a central component of electrical transmission and distribution systems today.''<br>
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[[Image:S & C Fuse.jpg|thumb|right]]
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[[Image:S&C Fuse South_Cal.jpg|thumb|right]]
  
 
This invention provided an economical, reliable means for interrupting high-current short-circuits in electric utility substations. It allowed utilities to expand their delivery of dependable electrical service to businesses and consumers.  
 
This invention provided an economical, reliable means for interrupting high-current short-circuits in electric utility substations. It allowed utilities to expand their delivery of dependable electrical service to businesses and consumers.  

Revision as of 03:10, 24 January 2012

Reliable High Voltage Power Fuse, 1909

In 1909 Nicholas J. Conrad and Edmund O. Schweitzer developed an extremely reliable high voltage power fuse, based on the injection of an arc-extinguishing liquid that assured proper interruption of short circuits. These fuses, later manufactured at this location, played a major role in the adoption of outdoor distribution substations, and the technology remains a central component of electrical transmission and distribution systems today.

This invention provided an economical, reliable means for interrupting high-current short-circuits in electric utility substations. It allowed utilities to expand their delivery of dependable electrical service to businesses and consumers.

This fuse design was much more reliable than previous power fuses. At the time, breakdowns in electrical substations were common, negatively impacting service reliability for customers of electric utilities. Often, the problems were found to be attributable to poorly performing fault protection equipment.

The inspiration for the device came to the inventors—two Commonwealth Edison engineers, Nicholas J. Conrad and Edmund O. Schweitzer—after they investigated a fire at the Fisk Street Generating Station. They concluded that the cause of the fire was a power fuse failure.

Schweitzer and Conrad’s fuse design differed from predecessors through its use of a special arc-extinguishing liquid that assured proper interruption of short circuits, and a fusible element that offered unmatched precision in operating only when called upon. The fuse was constructed to withstand the very high temperatures associated with interrupting high-current faults, and was sufficiently rugged so it could be applied outdoors.

The Schweitzer and Conrad Liquid Power Fuse played a major role in the adoption of outdoor distribution substations—a central component of electrical transmission and distribution systems today.

Letter from the site owner giving permission to place IEEE milestone plaque on the property

High Voltage Fuse Milestone Support Letter

Media:Pat1135548.pdf

1910_expenses-1-.pdf

Bulletin_200-A_1-28-10.pdf

Media:South. Cal. Ed. 4.pdf

Media:South. Cal. Ed. 3.pdf

Media:South. Cal. Ed. 2.pdf

Media:South. Cal. Ed. 1.pdf

Media:Instruction Sheet 210.pdf

Media:Duquesne Light 11-30-22.pdf

Media:Consumers Power 11-26-28.pdf

Media:Bulletin 200-B 10-30-12.pdf