A transformer is used to light a 24volts,70watts lamp from a 240a.c main.The current in the main cable is 0.35A. Calculate, (1) The efficiency of the transformer. (2) the current in the lamp.

1 Answers  

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what are the standard values for resistances(Megger testing) between L&N, L&E and N&E (L=Live,N=Neutral, E=Earth)?

1 Answers  

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Dear Friends, Need your help for connecting APFC panel, Quotation : I have 2 No’s 1000 KVA Transformers, both transformers are having separate APFC panels, ( Tr-1,400KVAR, TR-2,450 KVAR) Now I want to stop One transformer, present load is 650Amps, Max, So One transformer is enough, I have switched OFF TR-1, but PF is not maintaining properly, its 0.5, So now I want to connect TR-2 APFC also in TR-1 Loads, Can any one answer for my Quotation with drawing, how to connect TR-2 APFC panel in TR-1 Loads,

4 Answers   L&T,

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what is extra low voltage system

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what are the method of testing of transformer??

2 Answers   NCC,

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What is Biased Generator Differential Relay?

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how we can classify the circuit braker???????

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What is the effect of interchanging core(made of steel) and winding(made of copper) material in case of transformer? Give proper explanation in regard to different losses in transformer.

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What is the difference between earth resistance and earth electrode resistance?

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what is negative,positive abd zero sequence current explain clearly

1 Answers   Jindal,

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plzzzzzzzzz plzz send me the papers of JSPL WRITTEN TEST..SO that i can prepare for the test in electrical engg..

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What is the current flow in 230v ac supply ? What is the current flow in 415v Ac supply ?

6 Answers  

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