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Australian Oil Circuit Breaker Failure

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== OCB Explosion (Switching Failure)  ==
 
 
<p>Please see the attached [[Media:OCB_Explosion.pdf|OCB Explosion report]]</p>
 
 
 
== OCB Failure (Lack of Maintenance Failure)  ==
 
== OCB Failure (Lack of Maintenance Failure)  ==
  
<p>October 11th, 2008 - Australia's NT Power and Water Authority reported that heat caused by friction inside a circuit breaker led to the explosion at Casuarina substation that has caused major blackouts in Darwin's northern suburbs. </p>
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[[Image:OCBpowerwater.jpg|thumb|right|Mervyn Davies and Steve Vlahovic from PowerWater with the broken unit that caused the power outage. Picture: NICK WELSH]]
  
<p>[[Image:OCBpowerwater.jpg|thumb|right|Mervyn Davies and Steve Vlahovic from PowerWater with the broken unit that caused the power outage. Picture: NICK WELSH]]</p>
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[[Image:33KV OCB Upgrade.jpg|thumb|right|33KV Oil Circut Breaker CT Upgrade]]
  
<p>Mervyn Davies, who headed the inquiry into the substation failures, revealed yesterday how the initial explosion occurred that has led to the series of power outages. Mr Davies said general wear and tear had led to increased friction inside one of the oil-filled circuit breakers at the substation. This had led to the intense heat that caused the explosion. The investigation brought in senior expertise in utility quality HV electrical distribution maintenance from New South Wales.</p>
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[[Image:OCB 33kv OCB.jpg|thumb|right|33 KV Oil Circuit Breaker destruction, fire]]
  
<p>Mr Davies said the model of the circuit breaker installed at the substation after Cyclone Tracy had a common design fault. But he said there was no imminent danger of other circuit breakers exploding.</p>
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October 11th, 2008 - Australia's NT Power and Water Authority reported that heat caused by friction inside a circuit breaker led to the explosion at Casuarina substation that has caused major blackouts in Darwin's northern suburbs.  
  
<p>"I can never say it won't happen again but in the last two days we have done some very crucial assessment of the assets and we now feel more confident about their imminent likelihood of failure," he said.</p>
+
Mervyn Davies, who headed the inquiry into the substation failures, revealed yesterday how the initial explosion occurred that has led to the series of power outages. Mr Davies said general wear and tear had led to increased friction inside one of the oil-filled circuit breakers at the substation. This had led to the intense heat that caused the explosion. The investigation brought in senior expertise in utility quality HV electrical distribution maintenance from New South Wales.
  
<p>Power and Water has started rolling out [[Generators|generators]] around the suburbs to ensure power supply is guaranteed in the event of another failure at the substation.</p>
+
Mr Davies said the model of the circuit breaker installed at the substation after Cyclone Tracy had a common design fault. But he said there was no imminent danger of other circuit breakers exploding.
  
<p>Power and Water managing director Andrew Macrides said power outages had been scheduled in Brinkin and Leanyer next week for essential maintenance work.</p>
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"I can never say it won't happen again but in the last two days we have done some very crucial assessment of the assets and we now feel more confident about their imminent likelihood of failure," he said.
  
<p><br> </p>
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Power and Water has started rolling out [[Generators|generators]] around the suburbs to ensure power supply is guaranteed in the event of another failure at the substation.
  
<p></p>
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Power and Water managing director Andrew Macrides said power outages had been scheduled in Brinkin and Leanyer next week for essential maintenance work.
  
<p></p>
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== Further Reading ==
  
<p></p>
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[[Media:OCB_Explosion.pdf|OCB Explosion report]]
  
<p>[[Category:Culture_and_society]] [[Category:Disasters_&_accidents|Category:Disasters_&amp;_accidents]] [[Category:Power,_energy_&_industry_application|Category:Power,_energy_&amp;_industry_application]] [[Category:Inspection,_safety_&_security|Category:Inspection,_safety_&amp;_security]] [[Category:Product_safety]]</p>
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[[Category:Disasters_&_accidents]]
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[[Category:Power,_energy_&_industry_application]]
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[[Category:Inspection,_safety_&_security]]
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[[Category:Product_safety]]

Revision as of 15:18, 5 July 2012

OCB Failure (Lack of Maintenance Failure)

Mervyn Davies and Steve Vlahovic from PowerWater with the broken unit that caused the power outage. Picture: NICK WELSH
Mervyn Davies and Steve Vlahovic from PowerWater with the broken unit that caused the power outage. Picture: NICK WELSH
33KV Oil Circut Breaker CT Upgrade
33KV Oil Circut Breaker CT Upgrade
33 KV Oil Circuit Breaker destruction, fire
33 KV Oil Circuit Breaker destruction, fire

October 11th, 2008 - Australia's NT Power and Water Authority reported that heat caused by friction inside a circuit breaker led to the explosion at Casuarina substation that has caused major blackouts in Darwin's northern suburbs.

Mervyn Davies, who headed the inquiry into the substation failures, revealed yesterday how the initial explosion occurred that has led to the series of power outages. Mr Davies said general wear and tear had led to increased friction inside one of the oil-filled circuit breakers at the substation. This had led to the intense heat that caused the explosion. The investigation brought in senior expertise in utility quality HV electrical distribution maintenance from New South Wales.

Mr Davies said the model of the circuit breaker installed at the substation after Cyclone Tracy had a common design fault. But he said there was no imminent danger of other circuit breakers exploding.

"I can never say it won't happen again but in the last two days we have done some very crucial assessment of the assets and we now feel more confident about their imminent likelihood of failure," he said.

Power and Water has started rolling out generators around the suburbs to ensure power supply is guaranteed in the event of another failure at the substation.

Power and Water managing director Andrew Macrides said power outages had been scheduled in Brinkin and Leanyer next week for essential maintenance work.

Further Reading

OCB Explosion report