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technical question -powersystem and switchgearand protection

explain different types of d.c motors?

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how to minimize earth resistance upto 2Ω, if the resistance is 6 Ω ?

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what is the working principle of tube light?

2 Answers  

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230v AC & 230V DC which is more dengerous for getting a clectric shock between this two voltage?

5 Answers  

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Why grounding is generally done in supply end?

1 Answers   ISRO, OFBL,

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what is surge impedance loading?

1 Answers  

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CFL lamp is what type of load?

6 Answers  

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Why use prefer Dc drive in place of Ac drive for kiln Operatio in Cement Plant?

4 Answers   Orient,

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In all analog voltmeters or ammeter showing some small size symbols. as well as a star and in star 2no. digit, resister symbol,and other. what is that's meaning ?

1 Answers  

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how much winding resistance of 0.75kw to 12.5kw 3ph sqwiralcage induction motor?

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what is the main use of ac and dc drives ? it is only used for speed variation or for power saver also?

1 Answers  

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calculate external resistance values to add to the rotor of a slip ring induction motor. STATOR- 415 V, 3 phase delta, 1100 A, 50 Hz, 1490 rpm, pf 0,86 ROTOR - 660 V, 590 A, 50 Hz. STATOR current at each steps STEP1-600A,STEP2- 800A,STEP3-1000A,STEP4-1100A.

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