Answer / rajendra

not work star delta method in single phase motor because this method use in 10 hp to 25 hp 3 phase motor.

Answer / omarya

star delta method is not required in single phase motor
star & delta is used only three phase load.

Answer / william lobo

Well today we have DOL direct on line starters for upto 100 hp and more too.
So Star Delta for 1 ph motor does not arise. Question itself is wrong. No practical question.

Answer / guest

Star-Delta motor starting method is for reducing the
starting current by dividing line current with 3 square
that is considered in 3 phase only, and also most of single
phase motors are small motor having small starting current
so it is no point to reduce the starting current.

What will be result if we connect LT votage to the terminal of HT motor?

0 Answers   Equate,

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how actually an anti pumping device works? what is the operational principal?

2 Answers  

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We use ungrounded DC system (220V/110V) for control and protection system in substations etc. Suppose we have long 2 core DC cables running from our DCDB in control room to the load (length of around 2 to 3 km). Do we need to protect these long DC cables from earth leakages or not? If yes how?

5 Answers   Siemens,

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what are the different kind of cables used for transmissions?

0 Answers  

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What is RMU, and what it's function?

2 Answers  

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In a power conditoining unit (inverter) of a solar plant when we measure the d.c. current fed by different strings of solar plates to inverter, the current in the negative wire is less almost by 1 ampere to the current in its positive wire say current in positive wire 5 A , then current in negative wire of the same string is 4 A. Since the current entering should be equal to current leaving then why the current is noticably less in negative wire.

0 Answers  

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how  do you choose the cable size as per amps rating & the voltage drop for the same.

0 Answers   C&W,

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the site measured knee point voltage of protection class CTs should be greater than rated knee point voltage? what about meetering class CTs. Should it be below the rated knee point voltage?

0 Answers  

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is EEE eligible for getting electrical supervisor certificate ? if yes then from which state i sud apply

1 Answers   ONGC,

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why the excitation is necessary to produce the reactive power

2 Answers  

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which type of stability limit is higher,steady state or transient? why?

0 Answers  

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how to find out 3 phase complex power in per unit in unbalanced system?

0 Answers  

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