What are the circuit models used for analysis of medium length transmission lines? Which one is superior? Support your answer.

1 Answers   UPSC,

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Suppose an electric motor with a controller is not working. What is the sequence of testing you will do in your troubleshooting?

2 Answers   Emerson,

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How much area is covered by a single lightning arrestor to protect object from lightning strokes ?

1 Answers  

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Derive the inductance of a coil in terms of its physical factors.

1 Answers  

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On load tap changer (OLTC) explode? Transformer Vector group: Ynd11 Rated Power: 353MVA Rated Current: 693A Voltage:294/20KV OLTC Type: T III Y1000 110/c 12193w Max Operation Current: 295A Step Voltage: 550V Arrangement in Tx windings: Y Connection Problem: Damage of Unit 1 Generator Transformer On Load Tap Changer (OLTC) Description of Incident: 9.00 a.m. :- Generator No Load test on excitation system started 10.30 a.m :- Carried out AVR change over test 11.30 a.m :- Preparation for Generator Manual Synchronizing test 12.00 a.m :- Manual Synshronizing test started. Observed incoming generator voltage higher than running voltage. CECR operator operated Generator Transformer OLTC to bring down the incoming generator voltage 12.03 a.m :-Generator Transformer abnormal alarm operated at Gen.Control Desk (CECR) CECR operater at Generator transformer bay informed that the transformer oil splashed out from OLTC. CECR operater informed that he heard explosion inside OLTC. Observed Oil level & Oil Flow alaram operated at Tranformer local annunciator. 12.05 am :- CECR operator 'Open Gen Field Breaker” 12.10 a.m. :- Elec1 team inspected the OLTC and found the OLTC rupture disk was broken and oil spilled at OLTC area. - Elec1 found the OLTC top cover bulging. Do anyone know why and possibility cause happen in this OLTC.

9 Answers  

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what is the difference between earthed and unearthed cable?

24 Answers   Cords Cable, Essar, Torrent Power,

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what is the advantage and disadvantage of billing in kwh and kvah by electricity board .

6 Answers   Nespak, NTPC,

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In all analog voltmeters or ammeter showing some small size symbols. as well as a star and in star 2no. digit, resister symbol,and other. what is that's meaning ?

1 Answers  

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what is the practical application of full adder circuit?

0 Answers   College School Exams Tests,

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what is ISF

1 Answers  

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How to calculate no of Lighning arrestors are required for protecting 50mX 50m*20m cubical building and locations of LA?

0 Answers   HAL,

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In power plants the reading changes abruptly to give value (MW -25) (MVAR -15) What are the reasons for this? What is the solution?

2 Answers   GE,

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