Electrical Engineering Interview Questions
Questions Answers Views Company eMail

How to Make relay co ordination chart for a Electrical power distribution of a plant

2423

sir please tel me how calucalte kwh if home taken load 30ams how maney kwh taken per day.and 3phase motor 5hp per hars how maney load teken and how mach kwh and forward me to electrical table for calicalte kwh and kvr and kvah

1 2061

how to calculate the current if i know power in MW and voltage 11kv/415v and also want to know that incoming cables for trnsformer

Reliance, KOC, Daikin,

6 32661




How to calculate unit consumption on the basis of load. kWH=kwXhrs.is it correct? kw is motor load.What is unit consumption at 100% load, 50% load & on no load.

GIL,

6 46104

How we can calculate the consumption in kwh of motor on basis of kw @100% load, @50% load & @ no load.

Grasim,

1555

Selection criteria for Vector group in power / distribution transformer.

ABC,

1 6133

If load is 240 kw & pf is 0.8 lagging, than how to increase it from0.8 to 1.0(unit),which rating capacitor used, please give me Calculation. What is effact of consumer & suplier if pf is lagging or leading with on effect machines/ TF/GE etc.

L&T,

6 6799

what is the different between DC & AC load Line.

Emarat,

1 4464




tell me about vfd

8 5152

Suppose am having the PF value .8, so how can we say that is it lagging or leading?

Bhel,

11 7588

how to calculate the multiplication factor in HT incomer trivector meters

Dalkia, Gujarat Energy Transmission Corporation Limited GETCO, Getco,

8 47830

HOW DO I CALCULATE OVER LOAD RELAY & CONTACTOR IN DOL STARTER? & in dol why it is require circuit breaker?

DLF,

6 15708

What is rms value wher it is used??????????

789

How do you reverse the direction of rotation of a FAN?

CPCL, IOCL,

13 39062

how can we rotate a single phase motor (without cap.)in reverse direction?

2 2684


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Un-Answered Questions { Electrical Engineering }

What happened ,If 3 phase clearance not maintained in 33KV Line,11KV LIne etc?

1001


What is the difference between grid and off- grid system??

583


As per standard, transformer body earthing and other Equipment earthing (Equipment earthing) did not connect. but in LT side termination we are doing metal glanding in both side Transformer to PCC Panel through armoured cable, now X'mer body earthing and PCC Pane earthing (Equipment earthing) both are connect.is this safe for X'mer or other equipment?

370


For a 6.6kV Motor it is recommended to do megger test with 500 V d.c and not more than 5kV d.c but the Hi voltage withstand test should be performed by 12kV AC. Why the dc voltage test should be limited but AC voltage withstand test could be with such a high voltage?

706


condition Autotrip facia come on control panel of electrical transmission line?

199






do we use neutral grounding for resistive balanced load? if we use what happen?

547


How to calcute the cable size for both HT and LT please specify the formula for that Regards Chethan C

721


what is allowable ac mixing in dc

726


how can we design robots

703


design of IGBT firing circuit for 11KV

1126


What happen Grid EARTH plat got cut.

933


What are the special cables required for explosion proof wiring?

1334


i want to know about torque of slip ring induction motor

819


HOW TO REDUCE POWER PLANT AUXILIARY POWER CONSUMPTION?

1978


How may I get the maximum current capacity for a particullar size Alluminum or Copper cable if there is compulsion to use?

580