Answer / hussain

C)

Answer / dinkar

For same kva power , higher the frequency -lower the size.

Answer / kuruvaeresha

c

Answer / k.prakashchandra

b)

Answer / v.bharat kumar

If it is mentioned for same kva rating of transformer, then frequency is inversely proportional to size of transformer.

what is meant by distance protection ? how distance protection relay function ?

1 Answers   ABB,

Single line diagram for dbb (double bus bar)system.

0 Answers   KSEB, L&T, Siemens,

What is min and max voltage between earth and neutral/phase if it perfect earthing?

37 Answers   Epoch, ISS, ITC Infotech, L&T, Power Works, Statex, Sterlite, Wipro,

what is the power factor of an inductive load ? (i) Zero (ii) Lagging (iii) Leading (iv) Unity

5 Answers  

What is the operating principle of turbo-generator.

0 Answers  

How much resistance between neutral earthing and body earthing of Power transformer?

1 Answers  

To transmit the Power which must be present…? a) Reactance b) Resistance c) Capacitance d) none of above

9 Answers   ABC,

what is the RESTART INHIBIT protection?

1 Answers   Thermax,

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  

how to calculate multiplying factor with ct ratio 400/5

1 Answers   KBPL,

1 Kva = How many HP

9 Answers  

full form of flry b

0 Answers   KPIT,