Why 30°phase shift occur in star-delta transformer between primary and secondary?

1 Answers  

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explain the what is a drive ? 0 4 which type motor r use in the celling fan..... PCB plannet 2 13 If stator & rotor of a 3-phase induction motor have different no. of poles, will the motor run or not?? types of drives Why dc supply is used for closing and tripping coil of ht breakers. What happen if we use only ups ac supply only. ACC 1 41 how the 3phase induction motor is running in 2phase supply with help of capacitor? 1 33 what is the actual difference betwen constructional details and constructional features? 1 20 how does commutator convert a.c to d.c?

0 Answers  

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What is a parabolic signal?

0 Answers  

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does the power factor of an induction motor improve upon used in parallel with a synchronous condenser , used commonly to provide a leading kva ?

1 Answers  

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if single phase is 230 v three phase is 440 v then what about two phase?and why is it so?

2 Answers   Eicher,

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Why a Transformer Noise during its running condition ??

11 Answers   NTPC, UPPCL,

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what is the purpose of shading ring or shading coil in electrical equipments.

0 Answers   BARC,

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1.Why use in ups in software's,reason,and pls explain. 2.what is the isolation transformer and main use it's functioning and partes.

5 Answers   TATA, Wipro,

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A single line diagram(SLD) and a purchase order of a 11/66kV switchyard of a power plant was given. In the SLD, only one lightning arrestor(LA) was shown, but the purchase order had need of 3 LAs. Is this correct, if yes, why?

2 Answers  

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After synchronization with grid what is the demand value QKVAR and how we will maintain that?

0 Answers  

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how net resistance islow in star connection and viseversa in delta connection...? if anybody could explain in detail it wud be helpful.

0 Answers  

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How calculated single phase induction motor req. Capacitor?

0 Answers  

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