model question paper for supervisor trainee

0 Answers   Bhel,

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WHAT IS THE REASON OF CHANGE FREQUENCY IN DG SET AFTER FULL LOAD.

1 Answers  

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if we want ot select cable size with reference to load current it take than what is the formula and it is same for aluminium or copper?

3 Answers  

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( Re: WHAT SHOULD BE THE RATING OF MCCB FOR 415V,3Ph,50KVAR CAPACITOR BANK Answer # 1 The capacitor current would be kvar x 1000 / (415 x sqrt3). This would be 70a approx. The MCCB selected should have *atleast 1.4 times this current i.e. 1.4 x 70= 98. So you should choose at least 100 A mccb.) regarding to this answer,i would like to know why the current have to times 1.4 to get the right amphere for the mccb.hows the formula to get the 1.4??tq

2 Answers  

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The size and construction of bushings in a transformer depend upon?

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how much maximum load a 2 core (Single phase) 16mm aluminium wire can take ?

0 Answers  

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Disadvantage of leading power factor

3 Answers  

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how to select power and control contactor .

1 Answers   Bhel,

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for a 132/33kv transformer secondary is star and is connected to NER. and from secondary a cable is running to 33kv swbd. since the cable is single core do i have to run neutral cable also to 33kv swbd.???

5 Answers   PowerTech,

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Incoming line 11kv And transformer capacity is 2500kva. Consumption load is 1300A. Then fuse capacity is 11kv line.

0 Answers   Kraft Heinz,

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why the Parameters : Base Voltage & Maximum Voltage can't be equal in value in a VFD (Variable Frequency Drive) ? How much the base voltage would be lower than the maximum voltage ? If 400 V is the 3 phase output of a VFD ... then what should be the base voltage ? thanks a lot

1 Answers   Yaskawa,

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What is the required bending radius requied at the time of cable laying?

1 Answers  

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