whats the reletion betweet flow,pressure,head,rpm and motor rating?

1 Answers  

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how can we know the size of cable cross-section from current rating ?

3 Answers  

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How to calculate the slip ring induction motor rotor current and voltage.

1 Answers   Bhel,

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I have a question, I visit 01 site and face a problem, there is 2.5 ton Air Con working, when air con compressor is running at that time rectifier voltages are increasing upto 290-295 v and rectifier is giving main high alarm (rectifier is APC single phase), before starting compressor rectifier voltages was 230v. when air con is going off rectifier voltages are decreasing smoothly at its actual voltages 230v. Load on Genset phases is this: Red-13.5 amp AC (Air Con load), Yellow-1.7 amp AC (BTS lights etc.) and Blew-4 amp AC (telecom system load), Genset phase to phase and neutral to phase voltages are also ok. These are 10 sites having same system and same rectifier APC brand at every site 02 genset are working but the problem is same at all these 10 sites. What will be the reason behind???

1 Answers  

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what is significance of B-H curve? how it differs form ordinary transformers to Amorphous Transformer?

2 Answers   BARC,

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How Arc Produced in Circuit Breaker When the contacts of the circuit breaker open.

1 Answers  

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There are two nos of 33Kv/11Kv 5MVA transformers conecting through HT cable from substation having metering at substation itself.One transformer used at a time another remains stand by.Further 11 nos of 11Kv/440V transformers are attached on it and each transformer is having its own Power factor correction panel.Now one 33/11Kv transformer at no load condition/Stand by condition is having power factor in leading side upto 0.21 and while when another tranformer at same situation have power factor in lagging 0.42. Now one thing is clear that transformer one is having 1.5 Km long 33kv cable due to that PF goes in leading side and another is having only 250 mtr length remains him lagging. Now i want to know that how i can maintain the Power factor at no load/ stand by position though both are behaving in seperate manner.

1 Answers  

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I need to connect a synchronous generator to the grid using automatic synchronization and two circuit breakers (one for synchronization, one for end connection to the grid), how to determinate the required diameter of the cables?

0 Answers  

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what is the function of RMU?

4 Answers  

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can anyone explain the star-delta motor control wiring ,which wire go where and how they operate?

0 Answers  

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Is Transol transformer oil comparable to nynas nytro libra?

0 Answers  

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how do i get electrical supervisor certificate in gujrat?

3 Answers   DGVCL Dakshin Gujarat Vij Company, Infosys, ONGC, Orient, Reliance,

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