connected to only one power station‚ where the generators were housed‚ and were subsidiaries of that power station. LAYOUT OF ALL SUBSTATIONS IN POWER SYSTEM YARD TRANSFORMER- A transformer is a device that transfers electrical energy from one circuit to another through inductively coupled conductors—the transformer’s coils. A varying current in the first or primary winding creates a varying magnetic flux in the transformer’s core and thus a varying magnetic field through the secondary winding
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particles in tube. light‚ with normal voltage. Electrical interview question: What is "pu" in electrical engineering? Answer: Pu stands for per unit and this will be used in power system single line diagram there it is like a huge electrical circuit with no of components (generators‚ transformers‚ loads) with different ratings (in MVA and KV). To bring all the ratings into common platform we use pu concept in which‚ in general largest MVA and KV ratings of the component is considered as base
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Fig 1: Commutation of Thyristor: A-K voltage Time taken from stopping SR4 to stopping SR3 = 6.2 × 1ms = 6.2ms b) DC switch opening with an over current. Fig 2: Gate voltage of Thyristor c) C switching opening and closing by means of miniature switch. Fig 3: Voltage waveform between R5 and R6 Calculation of gate current of SR1 and SR2 Resistance of R5 and R6 = 100 Ω Peak value of voltage waveform = 50 × 3 =150V Gate current of SR1 and SR3 = 150/100 = 1.5A d) AC switch
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Schneider Electric 1999 1999 The year in review Get more with the world’s Power & Control specialist 1999 Profile Schneider Electric serves customers in with more than 130 150 150 countries production facilities‚ service centers sales outlets. and 9‚000 Our 67‚500 8.4 team members generated sales of billion euros in 1999 of which was outside of France) (82% in electrical distribution‚ industrial control and automation‚ raising net income by 18% 481
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A PROJECT REPORT BASED ON TRAINNING SESSION VINAY KUMAR VINAY GUIDED BY:- ELECTRICAL & ELECTRONICS ENGINEERING OIST BHOPAL. ACKNOWLEDGEMENT Firstly‚ I DHEERAJ KUMAR a vocational trainee-2012 batch would like to thank the management of NTPC LIMITED for arranging such a well managed training programme for the vocational training which
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reduce the voltage to a value suitable for distribution. Some substations provide facilities for switching operations of transmission lines‚ others are converting stations. Substations are provided with safety devices to disconnect equipment or circuit at the time of faults. Substations are the convenient place for installing synchronous condensers for the purpose of improving power factor and it provide facilities for making measurements to monitor the operation of the various parts of the power
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withstand voltage (dry/wet) -- for lines -- for CB / Isolator -- for other equipments Remarks 1050kVp 680kV 520kV 610kV 630kV 460kV 460kV 530kV 460kV (Line-ground) (open terminals) Substation Bird’s view 400kV Circuit Breaker 400kV Isolator 400kV Current Transformer 400kV CVT 400kV Surge Arrester Shunt Reactor & NGR 400/220 kV Auto Transformer 400kV Bus Post Insulator Wave Trap Functions of substation equipments
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AJAY KUMAR GARG ENGINEERING COLLEGE 27th km DELHI -HAPUR BY PASS ROAD GHAZIABAD -201009 A REPORT ON INDUSTRIAL TRAINING [pic] AT U.P POWER TRANSMISSION CORPN. LTD 132 KV SUB –STATION‚ GZB SUBMITTED BY SUBMITTED TO SARANG SAXENA Asstt. Prof. RAVINDER KUMAR EN-F DEPT. OF ELECTRICAL AND
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Jack St. Clair Kilby. In 1974 a basic patent for miniature electronic calculators has been issued to Texas Instruments Incorporated. The patent is for personal-sized‚ battery-operated calculators which have their main electronic circuitry in a single integrated semiconductor circuit array‚ such as the popular "one-chip" calculators. | | This represents another in a series of landmark developments at Texas Instruments directly relating to miniature calculators. In 1958‚ Texas Instruments
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.......................... 67 2.4 Protection against short-circuit ..................................................................... 70 2.5 Neutral and protective conductors ............................................................... 78 2.6 Busbar trunking systems .............................................................................. 86 3 Protection of electrical equipment 3.1 Protection and switching of lighting circuits ................................................ 101 3.2 Protection
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