what is the difference between Central Battery System and UPS in applications and uses? and why UPS suitable for Computers and central battery for emergency lighting?

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What is the use of oil in transformers?

0 Answers  

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Safety devices in SF6 Circuit Breaker?

1 Answers   DELL,

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50 electric bulbs are connected across supply of 220 volts. After one bulb is fused remaining 49 bulbs are again connected to same supply. which case will have more illumination & WHY????????

5 Answers   KJ,

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why cannot we use a freuency more than 400hz is used in aircrafts?

1 Answers  

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What is maximum rating of transformer ?

2 Answers  

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How can we do megger test of cable??

2 Answers  

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how many earthing required for ups, what should be the earth voltages

9 Answers   Juniper Networks,

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what is metering cum synchronizing panel and how it is used?

0 Answers   Wipro,

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can we use ACB for HT supply

2 Answers   Reliance,

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is it possible to have dc motors on single chip

0 Answers  

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can u give me a brief idea about power line carrier communication ??

0 Answers  

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