What are the Formula of computing Back up Time of 500kVA UPS with 4 Battery Banks, each bank composed of 43 pcs of Batteries 12V150Ah. How to compute the Back up Time of UPS? We have also 3X500kVA UPS running in Parallel same composition as I write above.88
my question is how to answer the question "you are from b.tech eee background and why do you want to go for banking72
What is difference between insulating medium and fault current interruption medium in a switching device.206
What will happen if the armature resistance is in minimum position and the field resistance is in maximum position while starting the motor
what is the size of ht cable of 33kv ht line and transformers ratings are 1 Mva and 5mva.please send formula also.104
can we install LT panel & HT panel in one room?1 234
Actually I have a doubt on neutral and earth.we use Ac power without taking neutral by connecting to earth,but at that time does it affects on efficiency of any electrical components or no? If yes how?
why the rotor current becomes in steady state during high slip region? please verify with equations.
Draw the DOL starter and star delta starter drawing?
volts=230 c=10mf a=??
why d.c produces corrosion
In electrical locomotive engines, the DC series motors is being used as traction motor. But in new engines like in WAP7 & WAG9 the 3-phase squiral cage induction motors has replaced them. So can someone tell me the advantages of induction motor over dc seris motor in engines points of view....???
Difference between earthing & grounding.?
Sir, My doubt on cable sizing calculation, Load:74 KW calculated cable 1 run 50mm2. Now client asking us to reduce cable size by increasing runs. Sir, My question now when my mind strikes with 2 options 1) Divide load 74/2 = 36 and calculate cable for 36+36 making it 2 runs or 2) Simply i can divide 50mm2 /2 ie. 2 runs of 25mm2 Please suggest me sir
Single phase and threephase power calculation
when the time of backcharging the transformer three phases only enough or three phase with neutral is must.from these which one is the best one.
what is the calculation formula for motor starting torque,running torque, running torque.
Please brief me about number of pole in alternator.In single phase alternator coils are connected in star or series. How to calculate frequency for the same.
PAC and simple Ac different
HOW TO CALCULATE S/C,O/C,E/F OF ACB.
In ups static switch if i gives the supply at output end it will open the circuit in stactic switch or not if it will open then how it operates.