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

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== Reliable High Voltage Power Fuse, 1909 ==
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''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.''<br>
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''In 1909 Nicholas J. Conrad and Edmund O. Schweitzer developed an extremely reliable high voltage power fuse which used&nbsp;an arc-extinguishing liquid to assure 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>
  
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.  
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[[Image:S & C Fuse.jpg|thumb|right]]
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[[Image:Pat1135548.jpg|thumb|right|Schweitzer and Conrad Patent]]
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[[Image:S&C Fuse South Cal.jpg|thumb|right]]
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[[Image:Consumers Power.jpg|thumb|right]]
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<br>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.  
 
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.  
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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.  
 
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  ==
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<br>
  
[[Media:SC_Milestone_permission_Letter-2.doc|High Voltage Fuse Milestone Support Letter]]
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== Images and Further Reading  ==
  
[[Media:Pat1135548.pdf|Media:Pat1135548.pdf]]  
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[[Media:Pat1135548.pdf|Schweitzer and Conrad Patent]]  
  
[[Media:1910_expenses-1-.pdf|1910_expenses-1-.pdf]]  
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[[Media:Bulletin_200-A_1-28-10.pdf|1910 Bulletin]]  
  
[[Media:Bulletin_200-A_1-28-10.pdf|Bulletin_200-A_1-28-10.pdf]]  
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[[Media:Bulletin_200-B_10-30-12.pdf|1912 Bulletin]]  
  
[[Media:South._Cal._Ed._4.pdf|Media:South. Cal. Ed. 4.pdf]]  
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[[Media:Instruction_Sheet_210.pdf|Fuse Installation Instructions]]  
  
[[Media:South._Cal._Ed._3.pdf|Media:South. Cal. Ed. 3.pdf]]
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'''Additional Images:'''
  
[[Media:South._Cal._Ed._2.pdf|Media:South. Cal. Ed. 2.pdf]]  
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[[Media:South._Cal._Ed._1.pdf|South. Cal. Ed. 1]]  
  
[[Media:South._Cal._Ed._1.pdf|Media:South. Cal. Ed. 1.pdf]]  
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[[Media:South._Cal._Ed._2.pdf|South. Cal. Ed. 2]]  
  
[[Media:Instruction_Sheet_210.pdf|Media:Instruction Sheet 210.pdf]]  
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[[Media:South._Cal._Ed._3.pdf|South. Cal. Ed. 3]]
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[[Media:South._Cal._Ed._4.pdf|South. Cal. Ed. 4]]
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[[Media:Duquesne_Light_11-30-22.pdf|Duquesne Light]]
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[[Media:Consumers_Power_11-26-28.pdf|Consumers Power 11-26-28]]
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<br>
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== Letter from the site owner giving permission to place IEEE milestone plaque on the property  ==
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 +
[[Media:SC_Milestone_permission_Letter-2.doc|High Voltage Fuse Milestone Support Letter]]  
  
[[Media:Duquesne_Light_11-30-22.pdf|Media:Duquesne Light 11-30-22.pdf]]
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<br>
  
[[Media:Consumers_Power_11-26-28.pdf|Media:Consumers Power 11-26-28.pdf]]
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== Proposal and Nomination  ==
  
[[Media:Bulletin_200-B_10-30-12.pdf|Media:Bulletin 200-B 10-30-12.pdf]]
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[[Milestone-Proposal:Worlds First Reliable High Voltage Power Fuse]]<br><br>[[Milestone-Nomination:Worlds First Reliable High Voltage Power Fuse]]
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<div class="header"><span class="head1">INNOVATION</span><span class="head2"> MAP</span></div>
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<googlemap version="0.9" lat="42.001466" lon="-87.679368" zoom="10" width="300" height="250" controls="small">
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42.001466, -87.679368
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S & C, Chicago, IL, USA</googlemap>
  
 
[[Category:Components,_circuits,_devices_&_systems|{{PAGENAME}}]]
 
[[Category:Components,_circuits,_devices_&_systems|{{PAGENAME}}]]
[[Category:General_topics_for_engineers|{{PAGENAME}}]]
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[[Category:Scientific_tools_and_discoveries|{{PAGENAME}}]]
[[Category:Power,_energy_&_industry_application|{{PAGENAME}}]]
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Revision as of 13:18, 1 August 2012

Reliable High-Voltage Power Fuse, 1909

In 1909 Nicholas J. Conrad and Edmund O. Schweitzer developed an extremely reliable high voltage power fuse which used an arc-extinguishing liquid to assure 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.

Schweitzer and Conrad Patent
Schweitzer and Conrad Patent


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.


Images and Further Reading

Schweitzer and Conrad Patent

1910 Bulletin

1912 Bulletin

Fuse Installation Instructions

Additional Images:

South. Cal. Ed. 1

South. Cal. Ed. 2

South. Cal. Ed. 3

South. Cal. Ed. 4

Duquesne Light

Consumers Power 11-26-28


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

High Voltage Fuse Milestone Support Letter


Proposal and Nomination

Milestone-Proposal:Worlds First Reliable High Voltage Power Fuse

Milestone-Nomination:Worlds First Reliable High Voltage Power Fuse

INNOVATION MAP