How can we calculate the power factor of an electrical
appliance ?

Is there any formula ? Is there any meter around to
calculate it ? And how to use that meter ? thanks

Answer Posted / shyam

power factor can be calculated by formula =kw/kva.
there are power factor meters avilable to measure the power
factor direclty of an equipment.

Is This Answer Correct ?    4 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

what is the max. acceptable leakage current in 33kv bus bar

2516


In Dyn11 power transformer if any one of the 3 phases connected to earth in star connected side then please explain effect of the current flow in delta connected side of transformer.(In this case if one phase is shorted to ground in star connected side then we observe the current flow in two phases only not three phases in delta connected primary side. Please explain why it is so?)

1306


What size cable (based on voltage drop) is required to supply a 40 A three phase boiler if the wiring system is 75V single insulated cables installed in non-metallic rigid conduit 56m from the main switchboard? Voltage drop in the consumer's mains is 8V.

1489


It is desired to flood light the front of a building 42 meters wide and 16 meters hig.Projectors of 30 degree beam spread and 1000 watt lamps giving 20 lumen/watt are availabl.If the desired level of illumination is 75 lumen/m and show a suitable scheme.Assume the cofficient of utilization, deprecitation factor and waste light factor are 0.4, 13 and 1.2 respectively.

2980


What does a Bode plot tell you?

818






hai iam arunkumar. i have applied for an section enginner in rrb. i want lat 5 years solved question papers. if u have please sedn it to arun30682@gmail.com

1316


what is the vvvf in the dumbwaiter?? or lift. what is the actual process?/

1620


What types of high speed CMOS circuits have you designed?

1640


What is hipot test procedure?

1015


Why insulation level follows this order? transformer < bus bar < circuit breaker & Isolator < transmission line.

1689


write circuit diagram for a motor rotate in forward direction once it started and when pressed the same button it should rotate in anticlockwise.

2072


what is mean by Digital Logic Meter (DLM)

1864


What type of DC motor would you see for a lift?

652


Write a note on Treatment for electric shock.

1420


L.A. (Lightening Arrester) is located at a place from where transmission line enters the transmitting substation. So L.A. (Lightening Arrester) is the first equipments which has to encounter with lightening, high voltage surges and switching surges. It has to absorb energy of lightening, high voltage surges, and switching surges. L.A. (Lightening Arrester) is made up of layers of semiconductors. If these layers can not tolerate energy released by lightening, high voltage surges, and switching surges the L.A. (Lightening Arrester) blasts.

677