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The north end of campus lost power for six hours on Saturday due to a transformer failure in Harbin Hall.
Although buildings lost power, all life-safety systems such as fire alarms, emergency lighting and sprinklers remained functional.
Harbin resident Julia Langan (SFS ’18) said that the lights returned in Harbin in the middle of the night, waking up many students. Harbin resident Celia Calano (COL ’18) said that although the Office of Facilities Management emailed students three times with updates, it failed to provide students with a reason for the outage. SFS Dean Joel Hellman (not pictured) met with MP Suresh Prabhu (left) and MP Piyush Goyal (right) when he visited India for the launch of Georgetown’s India Initiative in Dec. Panelists discussed the political future of Latin America at a student-organized conference in the HFSC on Friday. Supreme Court Justice Antonin Scalia (CAS ’57) delivered a guest lecture for 360 first-year law students in the Hart Auditorium at the Georgetown University Law Center’s McDonough Hall on Monday. Junior forward Grace Damaska scored the goal that tied the game and forced overtime in Georgetown’s loss to Hofstra in the first round of the NCAA tournament. Senior forward Brandon Allen was awarded the Big East tournament’s Most Outstanding Offensive Player honor following the Hoyas’ 2-1 victory over Creighton in the championship match.
Senior center and co-captain Bradley Hayes scored a career-high 19 points and grabbed a career-high 12 rebounds in Georgetown’s loss to Radford. Senior guard D’Vauntes Smith-Rivera, who has been Georgetown’s leading scorer for the past two seasons, scored 15 points in Saturday’s loss. Junior forward Alex Muyl scored the game-winning goal in overtime to give Georgetown its first Big East title in program history. The Georgetown University French Cultural Association organized a vigil in front of the John Carroll statue in Healy Circle on Monday evening. Students, faculty and staff gather in Dahlgren Quadrangle for an interfaith reflection following attacks in Baghdad, Beirut and Paris. The Eiffel Tower casts a shadow over Paris on Sunday, less than 48 hours after the Friday attack. Senior center and co-captain Bradley Hayes led Georgetown with 16 points and eight rebounds. Scott Dikkers, founding editor and former editor-in-chief of The Onion, spoke to more than 300 students in the ICC Auditorium on Monday.
The Mind-Body Medicine Program, which launched 13 years ago in the Georgetown University Medical Center, has expanded to undergraduates over the past few years, catering students in the School of Nursing and Health Studies and the School of Foreign Service who experience stress. All 95 Coca-Cola vending machines on the main campus and law center have been upgraded to be compatible with payments by credit card, Apple Pay or Google Wallet in addition to payments by cash and GoCard. Whether your requirements are on site repair of a transformers minor problem or complete rewind of your transformer, Delcor Power Products can be of service. With the rising cost of electrical grade core steel, rebuilding your transformer has once again become the most cost effective way of getting you back on line. Delcor Power Products has at their disposal the personnel, equipment and knowledge it takes to get you back on line in the quickest time available. Shown to the left is a typical failure of another manufacturer 2000 kVA substation transformer.


Custom sizes for direct replacement of an existing transformer or transformers with special bushing locations, air terminal chambers, or other special requirements pose no problems to Delcor Power.
With over twenty years in the electrical and transformer business, we can provide you with the service and transformer repair that fits your needs. Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology.
Reliable and continued performance of power Transformer is the key to profitable generation and transmission of electric power. High voltage winding: It is an insulated coil of copper wire, with a low cross section built to receive or deliver the highest voltage of the electric transformer.
The rectangular legs are used in small transformers (up to 50KVA). In more powerful electric transformers a staggered core section is used to increase the cooling surface. New York, May 10 (QNA) - A transformer failure at the Indian Point nuclear power plant caused an explosion and fire at the facility Saturday evening, sending billows of black smoke into the air near Buchanan, New York. The fire broke out on the non-nuclear side of the plant, about 200 yards away from the reactor building, the (CNN) quoted Entergy spokesman Jerry Nappi as saying.
Multiple emergency services agencies responded to the explosion at the plant, located approximately 50 miles north of Manhattan, including the Westchester County and New York State Police.
This case history involves the investigation of a utility transformer failure that occurred in a rural area surrounded mostly by farmland and open space. The engineer began his investigation by checking for reports of problems with other transformers connected to the same feeder. The apartment manager recalled that things were quiet at his facility on the evening the failure occurred. The golf course superintendent said the club had sponsored a large tournament on the day the transformer failed.
The superintendent replaced the fuse, and not long after that the power went out — this time, Dairy Farm due to a failed transformer.
The engineer asked to have a golf cart set up for charging, so he could record the harmonic spectrum and waveform of the battery charger current.
Battery chargers are invariably non-linear loads that generate harmonic currents, due to the action of diodes or other semiconductors that convert ac to dc.
When harmonic currents are flowing in a transformer, theresult is extra heat in the windingsand core laminations.
In the case of the rural transformer, three end-users contributed to the total load and all three experienced peak loads at the same time. The failure triggered electrical system safety mechanisms, which caused a power outage in surrounding buildings, according to Vice President of Planning and Facilities Management Robin Morey. Whether your repair is for a 50 kVA dry transformer or for a 15 mVA liquid filled transformer, we give them both the attention and time that is required. If you need a replacement transformer and it is not available from our inventory, we have a large data base of available equipment for quick shipment. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology.


These plates have on one side an insulation that was impregnated in the metallurgical process. On the picture there are the names of the different visible parts. Internally, it is possible to see the core, the primary and secondary windings with their respective terminals. This bit of Rural transformer failure research didn’t turn anything up, so he concluded the problem was probably related to the secondary loads. He also said nothing unusual had occurred prior to the failure, and his equipment continued to work normally after the transformer was replaced.
All the electrical test result found matching with previous result except core to tank IR value is found to be zero by 500 V meggar. We only use the best components, materials for your repair and technician with pride of craftsmanship will rebuild your transformer. In a redesign, additional bracing and the use of a Epoxy diamond Kraft paper which will be thermally set , will help in the reduction of future problems. In some instances, we can actually have a transformer on the road to you within hours of your call. All of this is submerged in a dielectric (electrical non-conductive) oil that serves as a heat sink. Some additional harmonic heating is due to skin effect, where the effective cross-section of a conductor is reduced at high harmonic frequencies.
We want to provide you with the comfort in knowing that your transformer will be back on line and work right every time. In applications where excessive short circuit is available, it is best to use a transformer with a cylindrical design coil.
The Fluke 43B showed the total harmonic distortion (THD) of the golf cart charger current to be 37 %. The amount of harmonic heating a transformer can tolerate is inversely proportional to the total secondary load. The yoke to tank isolation value by 500 V meggar is 0.05 M ohm and by multimeter it is 597Kohm. The load consisted of three end-users: a small apartment complex, a dairy farm and a golf course clubhouse. Values above 20 % would be dangerously high, given the estimated size of the charger load in relation to the total transformer load.
A heavily loaded transformer can overheat and fail if a large portion of the load current contains harmonics. Specialist, TCB department BHEL Bhopal, drying out & oil filling, oil settling done maintaining schedule.
Though yoke to tank IR value improved the core-tank remain in shorted condition as stated earlier. He opined for testing of buchholz gas & DGA before making any final decision on that basis.



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