Answer / k.prakashchandra

You mean 'grading capacitor'?They are basically for equally
distributing the voltage across the interrupters in SF6
live-tank multi-unit circuit breaker of above 420 KV class.

how voltage regulator works ?

1 Answers  

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what ever the ups kva it may 500 kva or 500 va always out put is AC 240 volts its right?

3 Answers  

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Min and  max capacities of VCB,ACB,ACCB,OCB,MCCB and MCB

3 Answers   apspdcl,

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What is basic fundamental for choosing NGR or NGT for any generator neutral grounding

5 Answers   EDF,

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why r use the wave taper in the substation ?

2 Answers   L&T,

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We use MCCB not MCB for motor starters because MCCBs has capablity to drawout the motor starting current which is 5-6 times the full load current of motor for 1sec. Then why we use SDF in starter panel means MCC panels. Pls reply if any one knows this answer.

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iii) A shunt motor runs at 70 rad/sec from a 460V supply and takes in an armature current of 100A. Resistors of 2.52 ohms and 1.64 ohms are connected in series with the armature and in parallel with the armature respectively. The field excitation remains direct from the 460V supply but the generated torque is halved. Determine the new running speed. Neglect brush voltage drop. The armature resistance is 0.4 ohms. [15]

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My load is 1635 KW. & current pf is 0.884, I have to improve it for 0.99.Please suggest what KVAR value is needed?

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why we use the fuse in only one wire? althrough in ac current the current flows in both directions. why the neutral wire can be taken half the magnitude of phase wire while same current returns from neutral wire?

2 Answers   Bhel,

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Do you have any P.L.C in your organization?

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What is basic impulse insulation level? And how it is calculated for sub- station?

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In ac which gas will be use?

2 Answers  

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