1.what is the reason for transformer and lightning arrester blast in 33kv system

0 Answers   ABB,

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Hello friends., my question is related to testing of current transformer... A Ct having knee point voltage of 750 volts., and I have two step up transformer's of rating 230 v to 440 volts., can I obtain the value of 750 volts by using the two transformer's.... If yes then how could I connect the transformer's to obtain knee point voltage?? thank you in advance

1 Answers   ABB,

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Why restricted earth fault protection is needed? Why can’t differential Protection is sufficient?

3 Answers  

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what will happen if multimeter(selector switch at DC voltage) and terminal at current is connected to DC supply?

0 Answers  

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Why the core of a underground cable is spiral in shape instead of straight??

3 Answers   Mecon,

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what is purpose of manual bybass in ups

3 Answers  

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What is tan delta & PPM in transformer? and whats its IS value?

0 Answers  

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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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why we use 50 hz frequency in india .. why not 60 hz 

3 Answers  

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why do we provide metallic enclosure to bus duct and then ground it?

1 Answers  

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1. what is the power factor of a purely inductive load? 2. Which type of transformer connection is preferred in case of power supply transformers? 3. In power transformer usually which winding is closer to the core? 4. what will happen to the generated emf if the no. of poles of an alternator is increased?

5 Answers  

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why the no.of slots in stator in not equal to the no. of stator in rotor in induction motor????

4 Answers   Jindal,

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