When VFD is connected to a 3 phase main supply there is load current difference between incomer to VFD and outgoing from VFD.

1 Answers   Shasun Chemicals,

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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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what are all types of cross section in AC cables?

0 Answers  

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A circuit breaker is a

9 Answers  

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My question is whether bellow formula is correct to find bus size for 46kA for 0.5 second & what is RT in bellow formula. formula to calculate the size of busbar to withstand the thermal stresses due to currents with duration of 0.2 sec to 5 sec. Sp = RT( I x I x t) / K Where Sp – is the cross sectional area of bus bar in millimeters. I -    is the value of AC fault current. t -    is the operating time of disconnecting device in seconds. K –  is the factor depending on the material of the conductor, insulation and initial and final temperature. Value of ‘k’ for copper is 143.

0 Answers   Premier,

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what is the necessity of neutral in 3 phase system?

5 Answers  

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how to select battery for 15 KVA UPS with formula

0 Answers  

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What is use of 3phase instead of single phase?

12 Answers   DCM, L&T,

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comparision between ACB and VCB

1 Answers  

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why does a dc machine has high efficiency while working as a generator than as a motor ..

0 Answers  

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why dc is used in control circuit for mv & hv switchgear instead of ac

0 Answers  

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what happens when dc supply is given to the transformer?

3 Answers  

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