Answer Posted / tarun aggarwal ymca(tarun.agga

Lightning is an atmospheric electrostatic discharge (spark),SO Initially It is DC with an extremely fast rise time which gives it a high frequency AC component at the initial strike. Once the arc is established it contains all frequencies in the RF spectrum which makes it AC.

If I want to replace a 26KW Slip ring Motor with a Squirrel Cage motor & Drive (for a Hoist Application). How can I approximate the Motor & Drive HP required in new Setup.

2319

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i have attended the interview on 4th June,08 at Kolkata in IOCL, can anybody tell me what is its result

2024

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how to calculate mf when meter and cTPT detail are given

1894

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Define ohm’s law for a.c (alternating current)?

1091

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Difference between Lugs and Thimbles

15265

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What is the range of the stator resistance of 3 phase induction motor?

1951

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What is CCM in Electrical ? where can we use this material?

1507

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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.

2109

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What are the function of different components of servo motor?

2084

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What is the slip speed?

1144

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What is lc oscillator?

1232

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for 5KW resistive load can anyone please suggest me whether to go for UPS/Inverter or Generator depending upon cost calulations

2149

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Why GRR starts from 60% of motor speed why not less than 60%?

1759

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Under wat condition statcom operates as an inductor for the transmission line?

1989

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DG SET BLOCK DIGRAM

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