Answer / sushil

Is A Primiry Pump Use On 500 KVA Above Diesel Generater
Starting Before serculate On Engine Oil

Answer / shri..

Priming pump is used for resecularating the engione oil.

Shriram

why transformer is rated in KVA ?

5 Answers  

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What is working principal of V.C.B., O.C.B., A.C.B & Over load relay?

4 Answers   Unitech,

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in a dc shunt motor what happens if motor takes high current,no speed

2 Answers  

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direction of tarbine& genrator

0 Answers   Sandvik,

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why the oscillator doent need the ac voltage??how can it produce the ac voltage by applying the dc voltage only??

2 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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Why NGR is required for 11Kv geneartor in power plant

2 Answers   AB Inc, ABB,

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where we use the SFU & FSU?

0 Answers   L&T,

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application s to shunt coil

0 Answers  

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how will be the capacitance generated in a earthed wire???

1 Answers  

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what collector is used for 100kmph-120kmph tracion application?

3 Answers   APTransco,

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what is the differance of acb and mcb and mccb

12 Answers   MacAir, MDS,

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