Answer / amit khamesra

Very Simplr. As second point of trafo sec ( 230 V ) was not
grounded the current did not get the return path upto the
source. In second attempt. the second terminal being
earthed, the current got the return path thru earth.Hence
the lamp glow.

Give some example of fault limiting devices?

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Pleae send me last 5 years of Question book about RRB chennai.

0 Answers   RRB,

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4-Why we measure the insulation resistance of main core and frame in spite of that must be connected with ground before energize the transformer?

3 Answers  

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-----------means a source which can supply a constant voltage to aload irrespective of the valu of load resistance.

2 Answers  

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How Self works in DG set

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list the advantages of RCCB over other circuit breakers?

0 Answers  

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corona happens more in ac or dc?

5 Answers   MAHINDRA,

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A 7 storey building has a floor area of 35,000sq.ft on each storey. On the ground floor 11KV electrical sub-station is to be erected. A load of 3kw for every 400sq.ft (p.f is 0.8) is proposed for each floor. fire pump 7.5hp, water pump 5hp, lift 2 nos, each 10hp and 20shop load of each shop is 5kw. calculate a. load each floor b. total load of building c. L.T feeders for aech floor and from transformer to main. d. distribution diagram e. capacity of sub-station/capacitor bank f. line diagram

0 Answers  

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what's the activities of reactor in Buchholz relay?

1 Answers   Yahoo,

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what size steel armoured cable is required to support 1500kva capacity. would 70mm squared be enough or would I need 90 or 120mm squared 3c plus earth

0 Answers   Conan Minerals,

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What is LOP Sensor in DG??????

7 Answers   Emerson,

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what is vector surge & vector shift? we have 25.3 MW(11kv) generator & 11kv/132kv transformer, connected with with 132 kv grid.vector surge relay is tripping frequentaly.what is permissible maximum limit for this.

3 Answers  

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