how much battery need for 2kv online ups for 2hr backup
Answer Posted / abid kahn
1 or 2
| Is This Answer Correct ? | 3 Yes | 1 No |
Post New Answer View All Answers
What are the different types of LT Cables?
how does an centrifugal and screw type chiller will work. which chiller efficiency is high and why.
what is servo motor & how does it work.
Why is back emf used for a DC motor? Highlight its significance.
what happen when power factor of 2 parallely operated transformer become equle?
What are merits & De-merits of State-Space Method? What is series programming, parallel programming, general programming & direct programming ? And, difference between these programmings Techniques ?
what is load despatching
1)what is the function of a frequency inverter? 2)If a few frequency inverter are connected onto a device network,what are the two setting that will ensure the frequency inverter work properly on the network. 3)whats is the name of the input sensor for weigher? 4)How to confirm that the load cellis faulty? 5)Describe briefly the steps to validate that the weigher is working properly? 6)Describe the procedure to validate the flowmeter accuracy? 7)Describe briefly the steps to validate that the tempreture sensor/transformer is working properly. 8)what is the adjustment that need to be done when you are calibrating the temperature transmitter ? 9)what are the safety measures to be taken before disconnecting motor for rewinding. 10)whats is the synchronous speed in rpm of typical 4pole 50hz motor? 11)whats is the formula for kw, ohm's law 12)if a 3phase motor is rated 3kw,415vac,what is it's rated ampere?
how to changeover ups in this power failur time?
what is the benefit of floating our DC source? if i have two floating DC source of which 1 has a ref voltage of -21VDC and the other of -18VDC. can it be connected in parallel to share a common ref voltage? if not, how do i make both sources to be of common ref voltage? tks
Difference between drift current and diffusion current?
Define delay time.
What is the RMS and DFT principle of analogue maesurments. Which way they are advangages. where which princples give optimum results.
how to calculation increase power factor for single phase
Whether IP65 enclosure box blocks ventilation if driver for LED have to enclosed inside IP65 box