Answer Posted / nithiyanandam
formula Kva=Kw X pf ie. 1Kva= KwX0.8 = 0.8 KW
So 1Kva=0.8 Kw.
| Is This Answer Correct ? | 5 Yes | 0 No |
Post New Answer View All Answers
How to Preparation of online test
What is the effect of solar radiation on the design of an Isolated Phase Busduct?
How to design the no. of ceiling fans required in 5mtr X 10 mtr X 3 Mtr hight room?
How many Zones can be in Conventional type fire alarm system & how can we detect the fire in Conv. type FAS?
What type of core material is used for metering C.T and protection C.T???
What is meant by earthhing of a magnetic flow meter and when to use empty pipe detection?
how to calculate short circuit current for the busbar
What are motor generator sets and explain the different ways the motor generator set can be used ?
how we calculate electrical load on a building according to area?
HOW TO SET THE EARTH FAULT SETTINGS IN ACB????????????
What are the factor to be consider for CT selection in 132kV substation?
How could a garment factory benefit from renewable energy
1. A 380 / 220 V r.m.s. 3-phase 4-wire circuit carries loads of 8 + j8.1 ohm; 4 + j4.1 ohm; and 2 +j2.1 ohmin the three phases respectively. The length of the circuit is 100 m, and the resistivity of the phase conductors is 0.0005 Ω/m. The neutral conductor is of the same size as the phase conductors. a) Select a reference angle 0for the first phase. Then write down the three phase voltages in both polar format and complex number format. b) Make appropriate assumptions, and take temperature effects on resistance is insignificant. Calculate the currents in the three phases. (Note: Determine conductor resistance, and apply Kirchhoff’s Voltage Law) Based on the result, suggest a main switch rating for the circuit. c) Show your preferred direction of neutral current in a diagram, and then determine its value. (Note: Apply superposition principle, and Kirchhoff’s Current Law) Use its magnitude to show that in this circuit, the unbalanced load may increase the voltage drop in some of the phases. (Note: Also observe the common volt drip in neutral) State your assumptions, if there are any. d) Suddenly the neutral wire of the circuit is broken. Estimate the new currents in the first phase, i.e. Phase L1. State your assumptions, if there are any.
Difference between RCCB, RCBO and ELMCB.
with out colour codeing on conductor how can be find what is r,what is b,what is y phases.....