Answer / rajendra

given Volatage = 415 volts, capacity on given voltage= 3kw
solution:-

while 415volts ac supplied than capacity of heater is 3kw
therfore 1volt supplied than capacity of heater will 3kw/415
so on380 volat supplied than capacity will be
3ooo*380/415=2.746kw
the anser will be 2.746 kw heater capacity on 380volts

Answer / v

Heater will take more current than it was taking before and
it's losses will increase.However it will give same output
as was giving but with increased lossess and get overheated
soon.

Answer / p brown

Lower the voltage will also lower the heater output and amp
draw.

415/380V 3ph.

92% of heater wattagage

96% heater amp draw

Answer / anil patel

1. Given v= 415v
kw= 3w
formula = w=v*v/R
3000=415*415/R
R=172225/3000
R=57ohm
I=v/R
I=415/57=7.28amp
2. given v=380volt , kw=3
R=380*380/3
R=48.133
I=V/R
=380/48.133
=7.8 amp

Answer / elangkumanan

heater =3.0kw
voltage=415v
heater
capacity=380v

formula
3*1000
=---------------
1.732*380*I*0.85
3000
I =-------------
560

I =5.4A

W =415
-----
5.4

= 76WATA

what is mean by lookup table in microprosser.

1 Answers  

What is Automatic interlocking circuit dighram between two contactor for DG SET panel.

1 Answers  

what are types of ups?

1 Answers  

what are the protections used in power transformers of 5 mva and above

2 Answers   ESRI,

How to calculate the value of capacitance of a capacitor used in power factor improvement plant if we know KVAR and voltages?

1 Answers  

how to calculate the distance relay faulty zone?pls explain?

0 Answers  

what is importance of ka in mccb

2 Answers   ABB,

what are transmission line parameters and transmission line constants?

1 Answers  

What is the effect on Power factor and capacitor when your company load is more than 70 % of welding transformer

0 Answers  

WHAT IS THE DIFFERENCE BETWEEN GENERAL INVERTER AND SOLOR INVERTER TELL ME PLZ

0 Answers   Epcon,

My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

0 Answers   Premier,

what are d/f between cfl and pl lamps,

1 Answers