Answer Posted / guest

when there is a unbalace among the phases due to change in
load circulating current introduced this fault caurrent can
be eathed via neutral .

how hydrogen cooled alternator undergo maintanence ? that is hydrogen when come in contact with air can result into explosions .

1881

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what is KSR type transmission tower? What is LSR type transmission tower?

5334

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What are the types of instrument transformer?

1118

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The loads are connected with phase and ground then why current flow as the loads ?

1912

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bitumar

2246

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What are the main advantages of generalized error co-efficients?

1116

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why is a power transformer used only occasionally?it is used to step up at generating stations?and that needs to be done all day long !!!!!!!

1818

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How much depth n width required for laying of 1X70 Sqmm Cable in Desert???

1579

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what is the calculation method to design core and winding of a 200kva 3phase distribution transformer?

2346

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volts=230 c=10mf a=??

1978

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What is the need of earthing transformer for delta side of a transformer. (Think of a line section between a star/delta transformer at a grid substation and delta/star transformer at a village. An earthing transformer is there at the delta side of the star/delta transformer at grid substation). As there are no ground reference there will not be fault current if a one phase is grounded. Further L-L phase will be sensed by the primary side of star/delta transformer as a L-G fault. So why an earthing transformer is required at delta side

1404

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Which type of motor is used in trains, what is the rating of supply used explain working principal?

1228

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What is turn ratio of a transformer?

1157

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Whether amorphous core transformer is available in India?.If available then up to what rating of voltage and KVA?.

1680

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The SFC of an engine is 0.25 kg/kW hr. when the fuel used has a calorific value of 36000 kJ/kg. the thermal efficiency of the engine is

1888

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