Answer / abdurrahim

Reactive power is part of Apparent power(KVA) which is
useless,oscillation between source to user.And return to
source.

To calculate reactive power,It is a sine factor of the
apparent power.

Answer / kvk surya

reactive power is some part of apparent power which is
depend on power phase angle between voltage and current

Answer / rama krishna

Power is defined as the rate of flow of energy past a given
point. In alternating current circuits, energy storage
elements such as inductance and capacitance may result in
periodic reversals of the direction of energy flow. The
portion of power flow that, averaged over a complete cycle
of the AC waveform, results in net transfer of energy in one
direction is known as real power. The portion of power flow
due to stored energy, which returns to the source in each
cycle, is known as reactive power.

Answer / ghanshyam singh

satisfied with RAMA KRISHNA, the power which is returned to the supply is called the reactive power
actual power consumed is active power while total of both these is apparent power

Answer / p.thileepan

reactive power is utilised to produce electric n magnetic
field. . ,wer as active power is used to produce torque n
rotations

Answer / kn

Reactive power is not a working power it stored power in the
form of magnetic field and it is also opposing power

Answer / keshab nath kundu

reactive power is required for producing magnetic field in
motor type load. .

Answer / kotha venkatesh

reactive power= activepower/apparentpower

what factor is necessary during design of HT & LT MOTORS.

2 Answers   ABB, L&T,

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?

1 Answers  

Does voltage and current can be seperated?

2 Answers  

for 4 MVA , 33K.V/6.6K.V transformer. secondary side the connected load is 3000H.P. What is the rating of capacitor bank to be insttaled.

1 Answers   SCCL,

why protection and metering CT's are always connected in star why not in delta?

5 Answers   Reliance,

what is phase voltage and line voltage? in line voltage how 415v is obtained?

9 Answers  

explain different types of d.c motors?

1 Answers  

How conventional fire alarm system works?

1 Answers  

I HAVE A 50A MCCB AS PER DESIGN LINE WIRE CONNECT UPWORD SIDE AND LOAD IS CONNECTED TO DOWNWARD SIDE TO THE MCCB.IF NOW ANY ONE CHANGE SUPPLY & LOAD(WISEVERSA) WHAT HAPPENS ? DOES MCCB OPERATION OR WORKING FUNCTION NORMAL IF YES THAN WHY THERE ARE MARKED LINE & LOAD ON MCCB.

1 Answers   HCL, TCS,

when transformer oil should be filtered/tested?

3 Answers  

why we use ac?why we use dc? why we we cannot use only ac/dc for all the applications?what happen if we use?

0 Answers  

Is an SCR semi controlled device?

4 Answers   IOCL,