Electrical Engineering Interview Questions
Questions Answers Views Company eMail

Why Magnetic Core Balance test is performed only on Star side of Transformer and not on Delta Side of Transformer (Vector Group Dyn11)?

1 3096

What is voltage

TATA,

5 6138

A simple Question from all.... If Voltage drops then its rated value what will be effect on a Residential load? similarly if voltage rises from its rated value then what will be effects on a load? i know if voltage drops the equipment or device draws more current then its rated what are other reasons ? thanks in advance for ur time.......

1 2190

2 electric bulbs of 100w,200V are put in series & the combination of each bulb is supplied to 100 V . the power consumption of each bulb will be????????

4 14854

which relay is better , instantaneous or IDMT relay .

2 4630

why star connected transformers used in tneb?

1 2870

what is the instrument used for measuring insulator RESISTANCE

TATA, Transco,

5 5737

what is stacking factor?

1 11164

Is there any Electrical supervisor license which gives permit to work whole India rather than individual state??

1381

explain me the relation between torque, frequency,speed,voltage and current in the 3 phase induction motor?

1743

at what rate the micro controller increment its timer....is it 1micro seconds or 1/(12*10^6) seconds

1339

L&T ACB C-POWER OF 800A FAULS TRIPING AT THE TIME OF 110KW MOTOR STARTS WITH EARTH FAULT RELEASE

Ambuja,

1 2870

L&T ACB C-POWER OF 800A FAULS TRIPING AT THE TIME OF 110KW MOTOR STARTS WITH EARTH FAULT RELEASE

Ambuja,

1 5361

URGENT PLEASE//////////A WORK SHOP IS HAVING A 100 KVA TRANSFORMER 11KV/415 VOLTS, AND THE CONNECTED LOAD OF THE WORK SHOP IS 80 KW WITH INDUCTIVE LOADS, LIGHTING LOADS,ETC., HOW MANY EARTH ELECTRODES ARE NEEDED AND WHAT IS THE EARTH RESISTANCE OF EACH EARTH ELECTRODE AND COMBINED EARTH RESISTANCE in normal soil. AT 11 KV SIDE AND AT LT SIDE. HOW TO CALCULATE.

1 2756

IN 500 KVA TRANSFORMER 11KV/415 VOLTS HOW TO CALCULATE THE HT CABLE SIZE AND LT CABLE SIZE FROM TRANSFORMER TO LT PANNEL. AND HOW MANY MAINSWITCHES OR MCBS WITH RATING ARE TO BE PROVIDED

BSF,

2 22637


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Un-Answered Questions { Electrical Engineering }

what is a types of short circuit and what is a types of distance protection tests

1758


Ratings of power transformer,Distribution transformer.

1089


How Load Factor, Demand Factor, Diversity Factor etc best applied in designing an electrical circuit? Is it allowed to consider these factors in each and every panel in an electrical distribution system? Can any body suggest a good book for reference?

2452


sir iam from electrical and electronics branch ,can i appear for the hpcl offline requirtment? if yes please mail me on vikram_raju25@yahoo.co.in

1540


Damping resistor provided in open delta (tartiary) winding of a measuring PT at the incoming of a MV inverter drive panel is getting heated up. Can any body explain the reasons and suggest the remedy?

2527






Is it true that in the 3 phase transformer, the limbs of the core are at 45 dgrees to each other. if true, why?

1573


What is the direction of current flow in ct secondary...means if the current is flowing from P1 to P2 then what will be the direction of current flow in ct secondaryw

1405


How much ph is maintained of water electrolyte which is used in LRS for 1200 kw slipring induction motor ?

1243


differnce between single acting and double acting solenoid valves

1394


what is the calculation formula for motor starting torque,running torque, running torque.

1214


why single CT used in DOL starter power circuit?

2054


How to calculate the no of Ceiling fan (1200mm sweep) per unit area?

1372


Why in power plant projects we see DOL starting method used for motors upto 160 kW instead of star delta method

1370


Following test should be conducted to find out relative polarity of transformenr terminals A no load test B back to back test C phasing out test D none of above

1747


What is Diff btw Fire Alarm & VESDA System???

1925