Answer / sujeet kumar

well i think it is only zero for a balance load in case of
balance load all current are in 120 deg so resultant is zero
but in case of un balance load it will not be zero

Answer / anshul kumar goyal

According to KCL
Cuurent coming to the point+current going away from the
point=0
Therotically same rule applies in star connection only if
load is balanced, but practically current at neutral point
is not 0 as .
To make the neutral current 0, earthing is provided in the
transformer commissioned at DT through a bush.
This earthing provides minimum resistance path for the
accessive current.

Answer / harpreet singh

due to 120 degree angle resultant is zero.so neytral ponit
having resultant is zero

Answer / niranajn

Because neutral in a star is the common connection of all
the three windings which is at zero potential

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0 Answers  

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i have a 1500kVA transformer what is the kWH meter i need to use?

0 Answers   HP, L&T, Mohammed Harasani Architects,

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1. What are the tests to be carried out for CBCT? 2. can measure the secondary resistances? 3. with respect to secondary maximum how much voltage can be applied for IR test.

0 Answers  

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if 20 hp motor starts directly delta connection.motor what will be the effect.

3 Answers   HP,

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what is droop control?

0 Answers   BARC,

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whenever any squirrel or a crow falls on the transformer input line then there is a big explosion and 440 volts of power is being discharged through the neutral line due to which appliances in off mode are also burned.we have earthing for the transformer as well as the bus bar chamber.why is it happening?

1 Answers  

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What do you mean by ratio correction factor of instrument transformer?

0 Answers  

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It is being often experienced that due to single phasing fault of any source transmission line of any closed loop synchronized circuit all the power transformers with primary stared trips but the power transformer with primary delta wont, why ?

1 Answers   MSEB,

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11 kg trivevter meter has rating of -/5amps. And pt ratio11000/110v and is connected with 11kv ct/pt unit of cr ratio 75/5amps. And pt ratio of 11000/110v while checking accuracy of meter with HT Accuchek meter what value of PT ratio and CT ratio to be filled in Accuchek meter

0 Answers  

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What do you mean by lighting transformer?

0 Answers  

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why should we connect the no load components in a equivalent circuit of transformer in parallel?why cant it be in series.

3 Answers  

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If one tertiary phase i.e. R,Y or B is earthed of a loaded type tertiary delta connected (Without load)of a power auto transformer, what is its advantage/disadvantage?

0 Answers   Amara Raja,

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