Current transformer home >> Transformer news >> Power transformers: January 2008
Tuesday, January 29, 2008
According to a California Power Commission statement, about 40% of all electrical outages are due to subversive failures that might raise as subversive cables deployed in the 1970s and early on 1980s near the finish of their working days, said Brendan Herron, present vice president of business improvement and policy.
By tradition, such failures had resulted in clients losing power for at most a couple of hours, as the service monitored grievance calls and deployed employees to check transformers in an attempt to recognize the location of the error, Herron said. By using current BPL arrangement and complex embedded sensing, the service can considerably reduce outage moment.
posted by jackysaran @ 3:38 AMpermanent link | |
Thursday, January 24, 2008
The Point shore nuclear plant in Wisconsin is undergoing unusual examination by the U.S. Nuclear authoritarian Commission as the outcome of an electrical transformer breakdown last week, the NRC thought on Tuesday.
The transformer disastrous on Jan. 15, causing the 514-megawatt Unit 1 to drop power from outerplant, which is located near Two Rivers, Wisconsin, and own by FPL Energy.
The plant machinist called it an strange event, which is the lowest stage of four tragedy classes in the NRC system.
While backup generator worked and kept back both units on line when off-site power was missing, Unit 1 was closed on Jan. 16 to find out why the transformer failed, the NRC
posted by jackysaran @ 1:31 AMpermanent link | |
Sunday, January 20, 2008
One individual got severe injury due to a low intensity blast before the Indian Institute of Technologys entrance caused by an electric line breakdown. The wounded person has been admit to a close by nursing home.
The blast occurred near the surrounding area of petrol pump diagolly opposite to the IIT entrance at roughly 11 am.
No severe injure has been reported. But the damage could be vast if the explosion grips the petrol pump.
Even though the explosive sound sparked the rumour that blast took place due to short intensity crude bomb. But, it was revealed later on that the explosion took place due to short circuit in transformer reserved on an electric pole.
posted by jackysaran @ 9:35 PMpermanent link | |
Sunday, January 13, 2008
A mid noon power outage distressing some 800 homes enforced the town to unlock an emergency protection at the Senior Center previous nighttime.
People lost their current after a power transformer at the North Andover Pleasant road Substation exploded. The transformer measures that electricity is flowing through the substation. Streets exaggerated by the power breakdown included Pleasant road, Stevens lane, Park avenue, Fountain Drive, Main boulevard, Osgood road, Concord lane, Davis avenue, Lincoln boulevard and Harkway Road.
As of 10 previous night merely two people had checkered in at the provisional shelter being harmonized by the North Andover Fire Department and American Red Cross of the Merrimack Valley. Further people have determined to go with relatives or somewhere else, Sgt. Pickard thought.
A few decided to continue in their house itself. One of the buildings exaggerated by the power failure was the 31 unit old housing compound run at Fountain Drive undergone by the North Andover board authority.
posted by jackysaran @ 11:40 PMpermanent link | |
Thursday, January 10, 2008
A lot of switch-mode power supplies make use of kick-start circuits to initialize their offline process. These circuits might be simple resistors, such as International Rectifiers IRIS4015, or other complex arrangements build with bipolar transistors or MOSFETs . These transistors supply the primary current for the flyback or PFC (power-factor-correction) IC. When such a power supply starts working in a common mode, a supply voltage from a winding keeps supplying the PFC IC, hence reducing power consumption of the kick-start circuitry.
Such scheme condense but do not eliminate the power utilization of the kick-start circuitry, since the dynamic component is usually a high power bipolar transistor or high voltage enhancement mode MOSFET. These transistors base or gate needs forward biasing with respect to the emitter or the basis for usual operation. Therefore, a power failure always shown in the circuits that maintains the transistors in the off state. Unfortunately, engineers give too little attention to depletion method MOSFETs, which require no forward-biasing for usual operation and, In addition, entail gate potentials below the source. These valuable property of reduction mode MOSFETs outfit them for a position in no-loss kick-start circuit for power supply.
posted by jackysaran @ 9:59 PMpermanent link | |
Tuesday, January 8, 2008
Recognized in 1936, CSR Zhuzhou Electric Locomotive workings has turned into the chief research and manufacture support of electric locomotives in China, as well as one of the nationwide agreed metro localization enterprise. With the yearly manufacture of 260 set of route electric locomotive, the works is entitled as the wealth of China Electric Locomotive.
The factory employ a sum of above 9900 staff, among whom there are 180 superior engineers, one academician of China Machinery & manufacturing. And it owns wealth property RMB 2.6 billion yuan. It has approved ISO9001 certification, ISO14001 guarantee of environmental system, and OHSMS qualifications of work-related fitness and wellbeing system sequentially. The workings keeps making earnings and remains healthy development for over 40 years
posted by jackysaran @ 1:53 AMpermanent link | |
Wednesday, January 2, 2008
Transformer oil pumps is being evolved dramatically over the past several years. Once considered to be simply a replaceable routine maintenance thing, equivalent to say, a regulator, pumps are now almost commonly accepted as a significant part of 'forced oil chilled'. Transformers a component that needs complicated manufacturing, high class building and methodical preventive maintenance.
When a transformer oil pump performs correctly, it ensures utmost cooling inorder to keep the transformer's peak weight capacity. On the other hand, impairments to a pump can result in pricey breakdown as well as potentially terrible damage to the transformer. Unfortunately, such impairments are notoriously complex to notice and prevent in pumps that are planned and build improperly.
Transformer oil pumps are builded in the United States had provided universal leadership in addressing many problems by introducing design improvements as well as innovations such as ultrasonic sensors that checks the state of bearing. The North American utility companies have also determined the improvement of high performance transformer oil pumps by requiring thermal, automatic, sealing, electrical and fluid system which provides dependable action.
Refer : http://www.poweronline.com/content/news/article.asp?docid=%7BCF8E5296-B574-48BA-84CC-89275EBF969E%7D&VNETCOOKIE=NO
posted by jackysaran @ 11:49 PMpermanent link | |
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