what is the operation of UPS ? can any one answer me?

7 Answers  

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I don't understand why when we connect high voltage source in DC to electronic motor , we must add capacitor and resistor in parallel ? (I know that we use capacitor because we want to absorb the current that in the first second electronic motor in opposed with current course produce. ) what are the feature of Resistor and in such situation ?

0 Answers  

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If we know the load for generator in KW then how it will be change to amps and also if we know the load in amps how it will change in KW and what Generator is good for that...suppose load is 500 amps 3phase......??

1 Answers  

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Simple explanation of kirchoff's law

2 Answers  

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How many no of flip-flops are required to get 16 bit counter

10 Answers   HAL,

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How to decide and select the different earthing wire size for the different types of earthing

0 Answers   Suzlon,

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hi... Can anybody give me description of type-2 coordination, IP protection, NEMA standards ? Thanks..

2 Answers   KSEB,

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why ground cannot be used as neutral as ground also provides close path for current flowing ?

3 Answers  

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A group of machines (wind turbines) connected with 33KV feeder and each machines are having individual VCB. The 33KV feeder connected with 110KV/33KV substation. The 33KV feeder tripped by over current at Substation and fault recorded at Substation as OC-R&Y phase. Same time the group of machines VCB tripped by over voltage, the fault recorded voltage was above 66KV by numerical Under/Over voltage relay. While grid drop time, this much of voltage hike is possible?

1 Answers  

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During Load testing of battery charger with temporary AC Generator .When reach 70% load Generator immediately shutdown .we could not able to Recognize ,what is exactly problem .Please kindly clarify us

1 Answers  

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can we use NPT glands in LT panel

0 Answers  

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how to Select Lighting arrester? What r the parameters to be considered for the selection of Lighting arrester ?

0 Answers  

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