Answer / jagdeep

because if we change the sequence of ryb the resultent vector of suppy gets reversed .

Answer / rajeshkumar k

suppose RYB phase sequence is correct,we start a motor it will rotate in correct direction,and motor is safe...if phase sequence is not correct voltage and current will flow and direction will be reverse and it will affect the motor and motor will get damaged.so we should check the phase sequence when we will start a motor

Answer / sakthivel

red &yellow& blue are primary color so we are elelctrical
phase name fixing time we R Y B (vanthni@yahoo.com)

why do you add the load short circuit impedance when considering short circuit amperage. It seems that you should only consider supply. If you need to consider loads and you don't know what loads are to be added , what would be a good sub-transient reactance rating for the loads?

0 Answers  

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why secondary of open delta pt (two element pt) centre tap is earth what happen when this earth is removed

1 Answers   Essar,

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why supervision relay is used in incoming feeders?

1 Answers  

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when the rheostat kept in minimum to maximum position in motors what will happen?

7 Answers  

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Why are short circuit ratings always 16kA,25kA,36kA and 50kA.Who has fixed these?

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What is the voltage b/w nutral and earth

11 Answers   Mind Space,

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what are the main differences of delta and star connection

5 Answers   Essar,

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what is the signification of trivector meter? why its name is trivector meter ?

3 Answers  

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Why Indian Electricity frequency desined 50 Cycles as developed countrys are using high frequency with low voltage

1 Answers  

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can i use 10 mfd + 6 mfd instead of 15 mfd capacitor in single phase motor as running capacitor

3 Answers  

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WHAT MEANT BY SEVICE FACTOR?

2 Answers  

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what is idmt relay

1 Answers  

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