Answer Posted / saravana babu

bcoz ..cu loss depends the current.iron loss depends the
voltage..so that total loss of transformer is depends
voltage,current...so the transformer ratings in KVA..

During regenerative breaking= A rotating magnetic field is reversed B slip is positive C torque is positive D slip is negative

2134

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What does the term supermesh means?

1196

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Explain the difference between verilog task and verilog function?

1350

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Draw a block diagramof Three UPS systems connected in Parallel mode?

2169

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for opening electrical shop, tips needed.

1837

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Minimum IR value of 1.1 kv grade 3.5c (300, 240,185,150,120,95,70,50,35,25) sqmm Aluminium XLPE cable and 4c (16, 10,6 & 4) sqmm cu arm cable between RY,YB,BR,RN,YN,BN,RE,YE,BE & NE.

3350

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What is routh hurwitz stability criterion?

1192

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Diagram on interconnectivity of 11kv transformer with RMU (i.e, one incoming and two outgoing or two incoming and one outgoing)

2733

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Y phase plates are used in transmission line??? what is there need???

2930

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what is the use of sdf?

2103

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what is the difference between torque induced and torque load?compare them with respect to dc motor?

2312

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According to underground cables a) stress b/w sheath & conductor is high b) inrush of core & conductor

1977

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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 could we know the size of cable by physical view?

1629

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What should be the amps for a MV fuses for transformer 630kVA 20(10)/0.4 kV

2043

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