Answer / mayur

as we all know transformer is static device so no friction
loss n all so it has more eff compare to rotating devices

Is there a chance for a motor speed to become negative..?? What is the reason for such a phenomenon.? In that case does the motor works as a generator..???

1 Answers  

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iam interesting to design the control panel for 3 phase pump motors by controling single phase switches.iam plan to use fuse,contactor & relay for motor protection .how can i select the voltage & amps rating for fuse,contactor & relay plz guide me .if anybody clarify my doubt means it will more helpful for my future .

1 Answers  

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What is the working principle of CFL & T5 tube light & 40W tube light with electronic ballast?

0 Answers   Remi,

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How regulator control the fan speed?

4 Answers  

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how can we decide where we have to DYn11 or other vector group transformer

4 Answers   BSL, Knight Frank, Security Printing and Minting Corporation of India Limited,

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What types of CMOS memories have you designed? What were their size? Speed? Configuration Process technology?

0 Answers   AFG, Afghan Telecom, GE, IBM, SECL, Sun Pharma, TNPL,

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during positive and negative half cycle of ac supply what happenes in the load?

1 Answers   Siemens, Wipro,

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On which side, taps are provided in tap changing transformers and why?

2 Answers  

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How to calculate the actual 3phase power, if the load current of each phase is not balanced

2 Answers  

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What is the restart inhabit setting in ABB spam150c relay (Motor protection relay)

0 Answers  

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What is the procedure/activities to be taken to inject the current more than 2000A by using 2000A Loading Transformer?

0 Answers  

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Hi all I had applied for the RRB test in the ELECRICAL category. I would be pleased if any of you can sent me previous year question papers. Please forward the question papers to varshashahi@yahoo.com Thanks and regards Varsha

0 Answers  

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