Electrical Engineering Interview Questions
Questions Answers Views Company eMail

what is the location of lighting switch of battery room

1 2987

how many percent setting of motor over load relay of its full load current

6 9692

i want to do a project on PLC.... please give me an idea.....

1 2138

what is the diff b/w HP and KW

10 8056

how many amps in 1KVA?


16 83888

how to amps calculate from 1KVA?

11 20318

what is meant by earth fault and how it happens....

3 28351

what ll happen to current if two phases get short circuited


2 6795

how many amps in 1 KVA? V=440v, PF=0.8 and FREQ=50Hz

22 27940

A three phase load, around 4 km away from the 11/0.433KV distribution transformer (Neutral of Transformer is solidily earthed) and consisting of mainly very costly and sensitive electronic equipments is giving trouble due to high voltage difference between neutral and body earth. Whether this problem can addressed by connecting neutral at the load point solidly to earth?

3 3012

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 13660

Is it posssible to obtain the higher speed(3000rpm) for adiferentiallly cascaded induction motors(with 8 and 6 poles)

3 1990

what deffrence between KW $ KVA ?

7 5356

why transformer rated in KVA not in KW ? we know that W= v*i

6 4660

What do you mean by Frame 5 Gas Turbine as well as Mark II.


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Un-Answered Questions { Electrical Engineering }



Motor,transformers,capacitor tubelight etc....


Why in metering Ct for ammeters ct secondary side is grounded for each Ct but not in case of CBCT (Core balance current transformer)..kindly some1 highlights the reason..is it because net flux is zero?


How to operate a ac chilar plant?


Is it possible to operate a synchronous 2-poles turbogenerator with a still-in-place faulted bar but electrically disconnected ???? If yes, should I act on the other phases as well ???


from where the self excitrd induction generator get the power?why is the voltage regulation is poor of seig?


what is the difference between electrical and electronic choke?


how to operate and maintenance of 1500 kva diesel generator set


any body,pls tell me how to done relay coordination ? how to coordinate by TCC curve?how to read the tcc curve?


Can you explain about pole discrepancy scheme


The gauge indicates the number of amps, but what about voltage? How voltage rating (for wire or fuse) determined?


what is the function of choke in the flourcent tube lights and why the colour is in white mostly in flourcent tube lights


What is the need of generator relay panel


can i use 4 number of circuit breaker as single phase manual change over switch? if yes then how plz also send ckt diagram at nazimzamurad@gmail.com


What is difference between start imitation and start interlock for 3 phase motor protection ?