Answer / jackblade76

In inverter the main power is directly given to output but
it at the same time also charges the batteries of the
inverter, so when the main power fails it senses the
failure & then it provides the battery power which is
converted from DC to Ac as the output. Hence there is time
lag.
In UPS system the power is not given directly to the
equipments but it passes thru the UPS batteries so incase
of mains power failure the output is not effected till the
batteries are completely discharged.
In both the cases the main power is first converted to DC
for batteries & from batteries the o/p is again converted
to AC & fed to the connected system.

If we have to feed a housing complex having load 8MVA, than what would be the better option, either we first step down 33kv supply into 11kv & than 430v or we proposed no of 33/.44 kv transformer, also which option is economical?

0 Answers   Kirloskar,

---

why dc motor is called constant flux motor?

1 Answers  

---

what are the necessary basic electrical topics to learn for mechanical engineer to deal practical problems.

0 Answers   Honda,

---

What happens when DC supply is given to transformer

4 Answers   CESC, IBM,

---

Which one is given high energy in same power consumption AC or DC

1 Answers   Dhyey Creation,

---

why normally Generator rating are between 11Kv to 22Kv?

2 Answers   IFFCO,

---

Can step down transformer works as step up one???

2 Answers  

---

shall we use a machine having 60Hz frequency in india ? why?

4 Answers  

---

hi i wonder will the speed of a 50hz AC motor reduce if i supply it with 25hz?

4 Answers   Divis Laboratories,

---

is it possible to say motor horsepower number without seeing name plate(when name plate damaged)

3 Answers  

---

Which thing is maximum in RLC circuit at resonance a)power consumption b)inductive current c)capacitive voltage

0 Answers  

---

how to calculate magnetic force genrated by a coil ?

0 Answers   L&T,

---