what is the meaning of insulation level?

2 Answers  

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How the electric train gets the supply of electricity? What is the return path of the current?

7 Answers   NTPC,

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transformer is working or not with supply of DC?

2 Answers  

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Can I use RCCB in moisture control device in a submersible pump.

2 Answers   TATA,

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why the field winding in dc motor is not short circuited eventhough dc supply is applied across the winding

0 Answers   Torrent Pharma,

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Lux meter is the measuring device to measure the lux level of lighting fixture. in industrial sector two types of lighting fixture is being used as street lighting purpose 1. HPSV (Sodium) and 2. HPMV (Mercury). HPMV having white light which is an combination of red, blue and yellow colour, while HPSV haivng Yellow lighting. in HPSV red & blue colour will be absent. during measurement of the lux level of HPSV and HPMV fixture. 1. Lux meter can measure the actual lux level of both fixture? 2. or it will show false reading for HPSV fixture light as it has only yellow light present. please give me answer

1 Answers  

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Why 30°phase shift occur in star-delta transformer between primary and secondary?

1 Answers  

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If one d.g. is unable to take full load of system, then second d.g. will take care of partly Load.for this condition RPM of both DG set should be equal.By using Synchronization panel RPM of dg sets are match, is it true?

1 Answers  

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how to calculate the current capacity of a wire if its dimension in Square mm is given

1 Answers   TATA,

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what is difference between armoured cable and un armoured cable

2 Answers  

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Instead of single phase(220), if apply Phase to phase supply (eg: for lighting fixture). what will be the power formula? what will be the volt and current value? please explain me with some example.

1 Answers  

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How the unidirectional torque produced in dc motor

2 Answers   CGL, Sail,

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