Answer Posted / parveenkumar

1KVA= 1.38Amp

I am doing apprenticeship training at HT switch yard in NLC. How can i get electrical c license. ??? What r the rules for getting it as an apprentice? ??

1855

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what is the synchronous timer ? and it applications.

2407

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What is the cut-off rate?

1180

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How to find ampere on ht side for selection of cable size ???

1805

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how can we say that stator magnetic field rotates with synchronous speed?can we derive?

1781

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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 0for 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.

2043

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if we run a 3 phase machine on two phase what will happend??? given answer with solid reason please

2102

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how the speed of the gets motor regulated. does it draw the same current on the all speed level.

2002

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Dear sir my name Ankit i m Diploma holder present working in Welspun Corp ltd Anjar as Asst.engg (salary 14400/month ctc) i Would like to change my company also i have selected in ford India pvt ltd Sanand as trainee Tech with salary 12000/month so please suggest me for changing my job hope for *ve response

2925

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why steady state stability limit is greater than transient stability limit ? How it can be explained ?

2924

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why we get 2 differnet values for power factor in 2 watt meter method in 3 phase

1864

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why power factor is important?

10390

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What is the use of mc( moving coil) in dc voltmeter and dc ammter and what is the use of ( moving iron)in ac voltmeter nd ac ammeter

2897

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Define reserve-generating capacity?

1189

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why we setting 95 deg and 105 deg in wti and oti of distibution transformer ? give the reson for that ?

3155

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