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Electrical Engineering Interview Questions
Questions Answers Views Company eMail

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

3842

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 3975

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

Daikin, KOC, Reliance,

6 46901

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 54962

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

Grasim,

2796

Selection criteria for Vector group in power / distribution transformer.

ABC,

1 8647

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 12565

what is the different between DC & AC load Line.

Emarat,

1 6739

tell me about vfd

8 12435

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

Bhel,

11 15569

how to calculate the multiplication factor in HT incomer trivector meters

Dalkia, Getco, Gujarat Energy Transmission Corporation Limited GETCO,

9 73341

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

DLF,

6 22054

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

1 4859

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

CPCL, IOCL,

13 54916

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

2 5319


Post New Electrical Engineering Questions

Un-Answered Questions { Electrical Engineering }

Give the expression for the frequency of oscillations in an op-amp sine wave oscillator?

1114


Any Electrical Engineering jobs?Please refer for interviews. Thank you

1922


hi everybody how to design string combiner box (scb) internal parameters like bus bar and spd (surge protection device and fuse which place to set that,and also bus bar one particular cross sectional how much heat generated and how much power loss tell me Clearly and briefly

1992


what is the power factor used by the PHCN in nigeria? 2. what is the difference between an alternator and generator. 3. Generation of poweris in KV but how is transmission is in MW. 4.If the transmission of power is 20,000MW how can it be increaesed to 80,000MW

8617


previous year paper of ntpc bhel for degree in electrical enng

3205


Define what is power quality meter ?

1269


how to extend relay operating timing in 24V dc relay card (without using Timer )

2007


What are the limitations of Kirchoff's laws?

1591


how can we determine size of a cable by knowing the kw or current rating of a load?how can we calculate the resistance box of a slip ring motor?

1764


What is the percentage loss for aluminium wire for HT line more than 11KVa

2128


What are the relays in ACB and VCB

2233


how the aircraft outer body and inner body is separated ?

1068


why should the lowest unit of a testing transformer ( cascaded transformer ) have higher power rating??

2299


How to calculate approximate load loss of a distribution transformer by knowing %ge imp of transformer?

2215


Dear all, I just want to ask an expert on this forum for some insights. For the magnetic balance test, when applied voltage on a Delta-Star transformer e.g. Dyn11, the following relationships apply for HV side: 1.  H1-H2 = H2-H3 H3-H1 2.  H2-H3 = H3-H1 H1-H2 3.  H3-H1 = H1-H2 H2-H3 For the LV side also: 4.  X1-X0 = X2-X0 X3-X0 5.  X2-X0 = X3-X0 X1-X0 6.  X3-X0 = X1-X0 X2-X0 Is there a similar pattern for Y-d, Y-Y, D-d? And how about Y-z, D-z, Z-y transformers? I've tested a YNzn5 transformer and for LV side I don't see the pattern. In this particular case I got for LV side the following (see values below): H1-H0  H2-H0  H3-H0    X0-X1  X0-X2  X0-X3 128.0  119.9  7.2      29.2   13.3   15.8 70.7   128.4  59.2     23.4   22.0   3.6 7.2    120.1  128.1    13.4   29.3   15.8 What is the relationship here for LV? For row 1 I see the relationship, for row 3 I also see but it's shifted, but for row 2 I don't see such relationship. Any suggestions, answers, someone?

1867