Electrical Engineering Interview Questions
Questions Answers Views Company eMail

I have 1 KW, 3ph. 440v, 50 hz, cos(phi) .75, efficiency 75%(star delta connection)Motor. How to calculate line current & Phase current (1) Star connection (2) delta Connection

2 4902

How much CTs are required to measure th curent in DOL starting of motor?PLs explain.

1 3806

calculate external resistance values to add to the rotor of a slip ring induction motor. STATOR- 415 V, 3 phase delta, 1100 A, 50 Hz, 1490 rpm, pf 0,86 ROTOR - 660 V, 590 A, 50 Hz. STATOR current at each steps STEP1-600A,STEP2- 800A,STEP3-1000A,STEP4-1100A.

3042

A car's starter motor draws a current of 100 A at 12,0 V when starting the engine. The mechanical power required to turn the engine is 960 W. At what rate is energy from the battery converted to non-mechanical forms of energy?

Siemens,

1598

what is 6 pulse and 12 pulse inverter? Explain brifly

2 17567

how does a liquid starter reduce the starting currents?

1636

What is distance protection relay? where & why we use this relay?

Siemens, UltraTech, Voltech,

2 11703

how much load should be given on 5 mva transformer

NTPC, OHPC, Power Grid,

7 26073

what is a vector protection in transformer

1491

solar energy light efficiency & disadvantages?

1539

what is alternator?

4 5663

what is the difference between LT & HT Motors

L&T,

11 86358

what are different types of electrical windings? i know the distributed winding ,concentrated winding etc but i want some detailed information, in what condition we will use distributed,concentrated windings what are the difference between them which is best, how induced emf changes by using different types of windings 20 hours ago - 1 week left to answer

1486

what is the basic difference between capacitor and condenser ?

ABB, Essar,

17 49226

when the supply of MSEB is cut off & all the load of the industry is driven on generator at that time the capacitor which is connected in industry for power factor control is switched off why?

1 3916


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Un-Answered Questions { Electrical Engineering }

What determines the thickness of the lamination or stamping?

1144


WHAT IS THE FORMULA FOR CALCULATING CURRENT RATING(DIRECT IN GROUND OR AIR) OF ARMOURED(XLPE) CABLE OF 4C,16Sqmm?

1627


list the advantages of RCCB over other circuit breakers?

1246


Where servomechanism is used?

617


i have to install a HT panel, what components, I have to use in this and what will the diagram of that diagram,please tell me each and everything.

1319






EXPLAIN USE OF ROCKING ARRANGEMENT IN ELECTRIC HEATING?

1361


Whether IP65 enclosure box blocks ventilation if driver for LED have to enclosed inside IP65 box

1557


How is the resonant peak, resonant frequency, and bandwidth determined from nichols chart?

638


What are the basic elements used for modeling mechanical rotational system?

590


What is meant by a stray loss of a induction motor??? What is the equation to find it

2556


where can the transformer having vector group Yny0 be used??

3560


why output is out of phase in case of common emitter?

1632


What should be setting for alarm,tripping and cooling fan on for power transformer's oil temp. and winding temp. indicator?

1428


Igfet is a

1172


Why colled 440V to 3-phase supply.

1656