Answer / iamdon

Hot resreves- Power plant available with thermal process in
operational readiness.

Spinning reserves- Power plant conected to bus and is ready
for taking loads(if any)

Author:arbelectbit@yahoo.com

Frequency in the control system represents? Continuous system in time domain ? In frequency domain?

1 Answers   CCP,

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How many kw will suply from one db

0 Answers  

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in dc shunt generator field is open in running condition what will happen?

8 Answers   century,

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How much UG cable size should i use so as to accomodate a ground + 2floors house. A 1.5ton AC & geysers(2) in each floor with lightings

2 Answers  

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What is cathode ray oscilloscope (cro)?

0 Answers  

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What is the importance of counter based plan & how is it scheduled?

0 Answers   TATA,

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wat is power factor

7 Answers   IOCL,

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what is the working of air drayar

1 Answers  

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current and voltage equations for a star connected load fed from a delta connected load.

1 Answers  

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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.

0 Answers  

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1. what is the power factor of a purely inductive load? (i) Zero (ii) Lagging (iii)Leading (iv) Unity 2. which type of transformer connection is preferred in case of power supply transformer? (i) Star/Star (ii) Delta/Delta (iii) Star/Delta (iv) Zig Zag/Star

2 Answers  

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Draw the circuit of clapp oscillator?

0 Answers  

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