Why need 3phase machine double earthing?

0 Answers  

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as per BIS supply voltage in India is ......

9 Answers  

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How generator NPS(NEGATIVE PHASE SEQUENCE TEST)TEST WAS DONE? PROCEDURE WITH DETAILS?

0 Answers  

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which types of tests are required after commissioning of 6.6 kva tranformer?

3 Answers   Reliance,

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What is the type of earth fault protection used in battery? explain.

0 Answers   PSEB,

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Why indicate only 440V to 3-phase supply.

4 Answers  

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use of PIR in ehv breaker

0 Answers  

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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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during positive and negative half cycle of ac supply what happenes in the load?

1 Answers   Siemens, Wipro,

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basic priniciple of induction motor

2 Answers   Electronics, Ramco,

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I have 3KVA Libert GTX2 UPS. I need to calculate the back up time with some load. How to calculate the Back time. I need the expert guide

1 Answers  

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Both generator parallel condition shared load equally but one genrator taking ampere more than the other what are all the causes to make like this

0 Answers   Ofer,

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