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[FoxNews]A small town's sudden power surge fried tech gear inhundreds of homes
A small town's sudden power surge fried tech gear in hundreds of homes
Full story: http://www.foxnews.com/tech/2017/01/...eds-homes.html Residents in the small Pennsylvania town of Brookville must've wondered what on earth was going on earlier this month when a sudden power surge caused electrical appliances and gizmos in up to 1,000 homes to fry, explode, or simply conk out. What may have momentarily seemed like some kind of weird supernatural happening was actually an electrical surge caused by a failed power line component, according to an AP report. Local media said that "damage ranged from residents losing a refrigerator to losing all appliances in the kitchen or losing everything in the house." Up to a quarter of the town's 4,000 residents were thought to have been affected by the incident, with many reporting fried computers, burned electrical meters, and damaged power strips. Some even spoke of fluorescent lights suddenly exploding. When the surge occurred, the high volume of calls flooding into the emergency services forced the local fire department to call for extra help from three nearby facilities. As for the local cops, the incident tripped its main office radio, causing them to miss the first emergency calls. The first they knew something was up was when they heard the fire trucks roaring through the town. "We were fortunate that nobody was hurt," Tracy Zents, the director of Jefferson County's Department of Emergency Services, told AP. -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
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[FoxNews]A small town's sudden power surge fried tech gear inhundreds of homes
I recall working on geophysical crews years ago. We used to go to South America
and the power in some of those towns was rather "flexible". We had surge supressors the size of a shoebox, not the mickey mouse things that hang off a wall socket. |
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[FoxNews]A small town's sudden power surge fried tech gear in hundreds of homes
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[FoxNews]A small town's sudden power surge fried tech gear in hundreds of homes
"Mr. Man-wai Chang" writes:
A small town's sudden power surge fried tech gear in hundreds of homes Full story: http://www.foxnews.com/tech/2017/01/...eds-homes.html Residents in the small Pennsylvania town of Brookville must've wondered what on earth was going on earlier this month when a sudden power surge caused electrical appliances and gizmos in up to 1,000 homes to fry, explode, or simply conk out. What may have momentarily seemed like some kind of weird supernatural happening was actually an electrical surge caused by a failed power line component, according to an AP report. Local media said that "damage ranged from residents losing a refrigerator to losing all appliances in the kitchen or losing everything in the house." Interesting how a failed insulator could have caused this. How often are distribution circuits of different voltages connected together but separated by only a single insulator? Up the street from me, they upgraded a MV distribution circuit from a lower voltage to a higher one (13,800V I believe). But a portion of it they decided to leave at the lower voltage, probably because there are a bunch of pad-mounted transformers feeding businesses there they didn't want to replace. They decided to feed that section from the far end through a bank of transformers, but where that section was once connected to the now upgraded section, they put in multiple breaks so that a single failed insulator or a lineman doing the wrong thing won't connect the two circuits. An underground feeder had its fuses removed, wires connecting the fuse holders were removed and the line from the pole with the underground feeder to the next pole had insulators spliced in the middle. At least 3 breaks. I've also seen the results of that type of surge. The top of a pole broke in a storm and the 4800V MV distribution wires made contact with the 120V/240V feed to houses. Two of them burned to the ground. |
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[FoxNews]A small town's sudden power surge fried tech gear inhundreds of homes
On 9/02/2017 1:11 AM, Michael Moroney wrote:
.... I've also seen the results of that type of surge. The top of a pole broke in a storm and the 4800V MV distribution wires made contact with the 120V/240V feed to houses. Two of them burned to the ground. Thank you for sharing! -- @~@ Remain silent! Drink, Blink, Stretch! Live long and prosper!! / v \ Simplicity is Beauty! /( _ )\ May the Force and farces be with you! ^ ^ (x86_64 Ubuntu 9.10) Linux 2.6.39.3 不借貸! 不詐騙! 不援交! 不打交! 不打劫! 不自殺! 請考慮綜援 (CSSA): http://www.swd.gov.hk/tc/index/site_...sub_addressesa |
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[FoxNews]A small town's sudden power surge fried tech gear inhundreds of homes
On Wed, 01 Feb 2017 17:31:50 -0000, Mr. Man-wai Chang wrote:
A small town's sudden power surge fried tech gear in hundreds of homes Full story: http://www.foxnews.com/tech/2017/01/...eds-homes.html Residents in the small Pennsylvania town of Brookville must've wondered what on earth was going on earlier this month when a sudden power surge caused electrical appliances and gizmos in up to 1,000 homes to fry, explode, or simply conk out. What may have momentarily seemed like some kind of weird supernatural happening was actually an electrical surge caused by a failed power line component, according to an AP report. Local media said that "damage ranged from residents losing a refrigerator to losing all appliances in the kitchen or losing everything in the house." Up to a quarter of the town's 4,000 residents were thought to have been affected by the incident, with many reporting fried computers, burned electrical meters, and damaged power strips. Some even spoke of fluorescent lights suddenly exploding. When the surge occurred, the high volume of calls flooding into the emergency services forced the local fire department to call for extra help from three nearby facilities. As for the local cops, the incident tripped its main office radio, causing them to miss the first emergency calls. The first they knew something was up was when they heard the fire trucks roaring through the town. "We were fortunate that nobody was hurt," Tracy Zents, the director of Jefferson County's Department of Emergency Services, told AP. You should have anything expensive in a UPS. -- A highway patrolman pulled alongside a speeding car on the freeway. Glancing at the car, he was astounded to see that the blonde behind the wheel was knitting! Realizing that she was oblivious to his flashing lights and siren, the trooper cranked down his window, turned on his bullhorn and yelled, "PULL OVER!" "NO!" the blonde yelled back, "IT'S A SCARF!" |
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[FoxNews]A small town's sudden power surge fried tech gear inhundreds of homes
On 02/08/2017 02:46 PM, James Wilkinson Sword wrote:
On Wed, 01 Feb 2017 17:31:50 -0000, Mr. Man-wai Chang wrote: A small town's sudden power surge fried tech gear in hundreds of homes Full story: http://www.foxnews.com/tech/2017/01/...eds-homes.html Residents in the small Pennsylvania town of Brookville must've wondered what on earth was going on earlier this month when a sudden power surge caused electrical appliances and gizmos in up to 1,000 homes to fry, explode, or simply conk out. What may have momentarily seemed like some kind of weird supernatural happening was actually an electrical surge caused by a failed power line component, according to an AP report. Local media said that "damage ranged from residents losing a refrigerator to losing all appliances in the kitchen or losing everything in the house." Up to a quarter of the town's 4,000 residents were thought to have been affected by the incident, with many reporting fried computers, burned electrical meters, and damaged power strips. Some even spoke of fluorescent lights suddenly exploding. When the surge occurred, the high volume of calls flooding into the emergency services forced the local fire department to call for extra help from three nearby facilities. As for the local cops, the incident tripped its main office radio, causing them to miss the first emergency calls. The first they knew something was up was when they heard the fire trucks roaring through the town. "We were fortunate that nobody was hurt," Tracy Zents, the director of Jefferson County's Department of Emergency Services, told AP. You should have anything expensive in a UPS. Big help if the house burns down. I've heard of folks getting MOVs put in right at the meter, outside the house. In that sort of super nasty surge, they explode and isolate the house from the line. Never had the urge to do it myself, but it might be good insurance. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net |
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[FoxNews]A small town's sudden power surge fried tech gear inhundreds of homes
On Wed, 08 Feb 2017 21:55:06 -0000, Phil Hobbs wrote:
On 02/08/2017 02:46 PM, James Wilkinson Sword wrote: On Wed, 01 Feb 2017 17:31:50 -0000, Mr. Man-wai Chang wrote: A small town's sudden power surge fried tech gear in hundreds of homes Full story: http://www.foxnews.com/tech/2017/01/...eds-homes.html Residents in the small Pennsylvania town of Brookville must've wondered what on earth was going on earlier this month when a sudden power surge caused electrical appliances and gizmos in up to 1,000 homes to fry, explode, or simply conk out. What may have momentarily seemed like some kind of weird supernatural happening was actually an electrical surge caused by a failed power line component, according to an AP report. Local media said that "damage ranged from residents losing a refrigerator to losing all appliances in the kitchen or losing everything in the house." Up to a quarter of the town's 4,000 residents were thought to have been affected by the incident, with many reporting fried computers, burned electrical meters, and damaged power strips. Some even spoke of fluorescent lights suddenly exploding. When the surge occurred, the high volume of calls flooding into the emergency services forced the local fire department to call for extra help from three nearby facilities. As for the local cops, the incident tripped its main office radio, causing them to miss the first emergency calls. The first they knew something was up was when they heard the fire trucks roaring through the town. "We were fortunate that nobody was hurt," Tracy Zents, the director of Jefferson County's Department of Emergency Services, told AP. You should have anything expensive in a UPS. Big help if the house burns down. I've heard of folks getting MOVs put in right at the meter, outside the house. In that sort of super nasty surge, they explode and isolate the house from the line. Never had the urge to do it myself, but it might be good insurance. Wouldn't a really big surge destroy the first thing it hits, i.e. the main fuse, meter, etc? -- What's the difference between PMS and Mad Cow Disease? The number of tits. |
#10
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[FoxNews]A small town's sudden power surge fried tech gear inhundreds of homes
On 02/08/2017 05:00 PM, James Wilkinson Sword wrote:
On Wed, 08 Feb 2017 21:55:06 -0000, Phil Hobbs wrote: On 02/08/2017 02:46 PM, James Wilkinson Sword wrote: On Wed, 01 Feb 2017 17:31:50 -0000, Mr. Man-wai Chang wrote: A small town's sudden power surge fried tech gear in hundreds of homes Full story: http://www.foxnews.com/tech/2017/01/...eds-homes.html Residents in the small Pennsylvania town of Brookville must've wondered what on earth was going on earlier this month when a sudden power surge caused electrical appliances and gizmos in up to 1,000 homes to fry, explode, or simply conk out. What may have momentarily seemed like some kind of weird supernatural happening was actually an electrical surge caused by a failed power line component, according to an AP report. Local media said that "damage ranged from residents losing a refrigerator to losing all appliances in the kitchen or losing everything in the house." Up to a quarter of the town's 4,000 residents were thought to have been affected by the incident, with many reporting fried computers, burned electrical meters, and damaged power strips. Some even spoke of fluorescent lights suddenly exploding. When the surge occurred, the high volume of calls flooding into the emergency services forced the local fire department to call for extra help from three nearby facilities. As for the local cops, the incident tripped its main office radio, causing them to miss the first emergency calls. The first they knew something was up was when they heard the fire trucks roaring through the town. "We were fortunate that nobody was hurt," Tracy Zents, the director of Jefferson County's Department of Emergency Services, told AP. You should have anything expensive in a UPS. Big help if the house burns down. I've heard of folks getting MOVs put in right at the meter, outside the house. In that sort of super nasty surge, they explode and isolate the house from the line. Never had the urge to do it myself, but it might be good insurance. Wouldn't a really big surge destroy the first thing it hits, i.e. the main fuse, meter, etc? It matters where the big arc happens, though. You don't clear a high energy 1600-4800V circuit with a domestic 240V breaker, that's for sure. The result is an _arc flash_, which you do _not_ want in your vicinity, trust me. (Youtube has a lot of examples if you doubt this.) Having a major league arc flash on a cinderblock foundation outside the house is a very different proposition from having one in a breaker box mounted to a wooden stud wall inside, for one thing, but I'm outside my experience here, so I'll happily defer to any actual power engineering types who want to chime in. Cheers Phil Hobbs -- Dr Philip C D Hobbs Principal Consultant ElectroOptical Innovations LLC Optics, Electro-optics, Photonics, Analog Electronics 160 North State Road #203 Briarcliff Manor NY 10510 hobbs at electrooptical dot net http://electrooptical.net |
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