Why use only DC supply to charge batteries why not AC Supply??

3 Answers   APC, Emerson,

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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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how did the testing of protection relays done through current injection

0 Answers   Bhel,

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AVR

2 Answers  

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What type of wiring series or parallel is used for conventional and addressable type FAS & why?

0 Answers  

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2. What are the parameters of EHT sub-station?

0 Answers   APGenco,

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What is cathode ray oscilloscope (cro)?

0 Answers  

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acsr dog conductor specification

1 Answers  

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what type of motor is used in fan

6 Answers  

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difference between Ac and Dc mcb ????

0 Answers  

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why tan delta test is carried out in the power transformer? which parameter are measure?

1 Answers  

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From past few months I am getting lagging pf even though sufficient capacitors used in circuit. Where is the problem pls answer

0 Answers  

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