Answer Posted / plani swami

Within this 3 Months.

What do you mean by turns ratio of instrument transformer?

1101

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I am having a 42KW 3 phase electrical heating furnace, heating element is 80/20 nichrome material, my connections is made in such a way that 2 star connection compromising 2 coils per phase so totally 12 coils, shall if i use it unbalanced star condition (instead of 2 group of 3 phase or 1 group of 3 phase, connecting 4 phases of 5 phases) what will be the consequences and is it acceptable?

1683

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what is the use of static frequency converter and static excitation equipment? and where it is employed? for what?

3486

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Pls mail me utility & Dg related question with answer

1792

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What is the unit of attenuation?

1082

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how can motor both beasrings insulation resistance can be check?

2032

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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.

2042

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how to i get B licence,i am completed BE electircal and electronics engineering.i want to konw the proceduure to get b licence

1751

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what are the advantage and dis-advantage of 3 phase 4 wire energy meter?

2192

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What is the difference between security constraint unit commitment and security constraint optimal power flow?

1720

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How colour picturetube works & how many year it will works.

2037

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how dia of wire and angles are calculated for overhead shielding wire to protect substation equipment from lightening strokes???

2031

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what happen if field of dc shunt motor opens? what is function of putting res. in parallel to one phase of 3 phase IM? the power supplied by 5A source in circuit is given by------Watt.

2059

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how we can set the IDMT relay.

2222

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What are the advantages of speed control using thyristor?

1124

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