1. what is the meaning of bus? 2. what is the dc transformer? How it work 3.what is the function of the serge absorber? 4.How the CT and PT rating calculate/

1 Answers  

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explain Uninterrupted power supply detailed electronical operation with circuit diagram

1 Answers   Emerson,

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DIFFERENCE BETWEEN TRANSFORMER AND CURRENT TRANSFORMER?

7 Answers  

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what is cutoff voltage?

3 Answers  

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Explain what cmos is and its benefits?

0 Answers  

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in case of OC+EF relay, how the burden is divided/calculated/shared by the CTs in case of normal (healthy condition) and during fault conditions.? three coils of OC & ef coil is conected in residual connection across the three CTS.

1 Answers  

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how to calculation increase capacitor,increase power factor for three phase.

0 Answers  

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during installation time of transformer and alternator which points we have to observed?

0 Answers  

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What is the difference between the relay and the circuit breaker?

0 Answers  

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Why we oil in tranformer/

5 Answers  

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What is working principle of washing machine?

9 Answers   IBPA, Samsung,

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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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