Answer / tapeshwar pandey

It should be more than 11 mega ohm as per thumb rule.

Answer / kani

insulation resistance must be infinite otherwise leakage
current will flow ,so that insulation detoriation happen

Answer / murthy

Ideally in the range of 5oMohms is required for less
leakage current.2Mohms per KV of the cable at room
temperature is a thumb rule

Why voltge arev transformed in to 132KV/66/KV/33KV like that

5 Answers   HAL,

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How does a ideal c.t. works ?

0 Answers  

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Why two phase welding machine is used instead of three phase welding machine.

0 Answers   Merck,

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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 THE RATINGS OF TRASNFORMER IS IN KVA?

5 Answers   Jindal,

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GIVE CONDITION FOR MAX EFFICIENCY OF 3-PH TRANSFORMER AND D.C MOTOR

2 Answers   BARC,

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what's the difference between 'shaft power demand' and 'BHP' , when we consider electrical load list.

0 Answers   HEC,

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is the electrical energy photo copy possible or not???????????? give me some idea about that i m very great full tu u.

5 Answers  

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What are the main factors to be considered(In terms of energy conservation) while selecting a new air compressor?

1 Answers  

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What happens to the synchronous generator when reverse power is given to it?

1 Answers  

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what is kvarh? Please difine it With calculation

3 Answers   GM General Motors,

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what is on line transformer and off line transformer.

3 Answers   Cisco, HP, ICC,

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