Answer / jack

E.g. : Solar systems can be sized in 12, 24 or 48 volts.
As a general rule, smaller Photovoltaic systems are run on
12 volts. 24 or 48 volt equipment can handle 4,000 watt
systems. 48 volt systems are designed for energy
consumption needs of over 4,000 watts.

Answer / jack

we can use some power supplies and Electri motors

Answer / shafieque

48V are safe volts for hand hold devices.we can use these
volts in confined space like vessels etc.

What is the difference between PS & metering CT (5p20,0.5 etc.)? Why in PS class CT only Vk is given ? Is PS class CT is more accurate than metering CT?

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11. As per the theory current doesn’t flows in Neutral, but practically it is not applicable, explain why? 12. How to take the Vector Group Test in Transformer? What is the purpose of doing Vector Group Test? 13. Why the transmission lines are in 11kV, 22kV, 33kv, and why not 10kV, 20kV, 30kV? 14. Why do we generate 3 Phase AC Supply? It is possible to generate 4 Phase and 5 Phase explain it? 15. Explain why the Voltage drop will happen in 3 Phase line? 16. What is the equipment used to control the generator output? 17. What are the factors to be considered during the Synchronization? 18. What should be value of Circuit breaker operating time and tripping time? 19. Why the CT Secondary is rated as 5A generally? 20. At which time Synchronous generator act as a Synchronous Condenser?

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What are motor generator sets and explain the different ways the motor generator set can be used ?

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In Air circuit breaker LSIG protection unit is used. Without fault in cables (2 runs 3Cx150Sq.mm Copper, 1Kv grade, XPLE armored cable IR value is more than 550Mohm @ 500V Megger) and load section Long time Overcurrent protection is triggers and trips the unit. We changed LSIG protection with new factory tested unit. Even then fault is persisting. Please suggest the possible causes

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What is the difference between acs 550 & acs 850

0 Answers   Madhucon,

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Do we really need wheels for the transformer

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why we still use sinusoidal waveforms for transmission and utilisation (we know generation is sinusoidal), instead of other ac waveforms such as triangle, sawtooth, square etc.,? is there any mathematical derivations to prove sinusoidal is efficient than others?

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Can we step up a 230V supply to 400V using a single phase transformer??

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What is restricted earth fault protection ?

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1000kva = how much kvar

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what is meant by earth fault and how it happens....

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what type of earthing do for dry fissure rock?

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