ASTM D 3455 - Standard Test Methods for Compatibility of Construction Material with Electrical Insulating Oil of Petroleum Origin has been used for Testing Transformer Oils with a product placed in it. Aged Control Oil has a Power Factor of 0.032% at 100°C. Aged Oil with a Test component has a Power Factor of 0.093% at 100°. Is this increase acceptable? If not why? How much increase is acceptable?

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i have seen one 8.4 MW synchronous motor in a plant located in bellary it is fixed with brushless rotary rectifier ,anybody can explain its start up principle

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what is the difference between electrical & electronics?

4 Answers   JSW,

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What is the basic difference between earthing, ground and neutral?

11 Answers   Balco, Cognizant,

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WHAT IS REACTIVE POWER?

2 Answers  

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Why we Specify Transformer rating 433 V Instead of 415V ?

8 Answers   ABB, ERA, Uddans,

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i want to know about for what reason we are using star delta starter? how it works? what are the advantages?

4 Answers  

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george phenomenon of synchronous machine

0 Answers   JU,

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If u have Powergrid model question papers Please send to below mail ID rajutheprince@gmail.com

0 Answers  

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why we somewhere use ryb phase sequance, somewhere use uvw, and somewhere abc??

4 Answers  

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how to calculate the powerfactor in induction motor having name plate details? for example 1 h.p motor 1.86 A 415 V

6 Answers  

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if a 3 point starter is not available, how can a dc motor be started?

3 Answers   Accenture, BIT, Techno Solutions,

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