Answer / thowsif_emerson_csm team

A UPS consist of 3 parts ,inverter ,charger,and AVR
(voltage regulator).when mains is present a UPS provides
supply to computer in regulated mode using inbuilt AVR ,and
simultaneously charges the batteries.
when mains fails it changes over to inverter mode using an
electromechanical relay (The changeover time is as fast as
4 milli secs in offline UPS).The charging current of ups is
normally 1amps to max 6 amps

in case of inverter when mains is present it bypasses what
ever comes in betweeen 100-280 volt(a typical setting in
all reputed brands)
when mains fails it changes over to inverter mode and
change over time as high as 200 mill secs.
The charging current is high minimum 8 amps and can go upto
20 amps

there are some companies which make special kind of
inverter under the name of home ups.These are ordinary
inverter with two difference ,one----the change over is
made very fast upto 10 millisecs,
second input mains range is reduced to 190-250 v A/C,so
that if it goes below 190 volts it goes to batt mode and
same is te case when input exceeds 250.These kind of home
UPS are succes ful only upto one PC ,with higher number of
PCs the complaint of rebooting whem mains fails increases
drastically,hence never recommended.

Answer / yvb

Inverter is Part of UPS. May be above answer given by an IT
student.
mains + rectifier + battery charger + batteries + inverter
= UPS ( A static switch also includes in industrial ups.)
UN INTERRUPTED SUPPLY means absolutely no inturruption.
its hard to sence intruption.
Inverter also consists same parts but less
capacity.changeover is not fine.we can sence the
intrruption.

Answer / mohit.k.k

what ever above said is right but technically inverter is
that which convert d.c to a.c and its is a part of ups
(uninterupted power supply)

Answer / vj

whatever mr.Thowsif_emerson_csm has explained is good....
i wud like to know some answers on distribution side like why transformer rating is given in kva?
what happens if reactive increased or decreased?
what is the exact amount of reactive power should be maintained?
and wht to do for that?

What is the difference between power cable and signal cable (only Observation Difference)?

1 Answers  

---

How to calculate earth flat size for 250 Kva DG and transformer?

8 Answers   Deepak Fertilisers,

---

Electromagnetic torque developed by the motor is compared to shaft torque. A less B same C depends on motor design D more

3 Answers  

---

what are the main differences of delta and star connection

5 Answers   Essar,

---

witch pump used in wtp

0 Answers   Dalkia,

---

WTA used cb?

0 Answers   Tagros,

---

How to calculate the current rating of power cables ?

1 Answers  

---

why starting current is high and resistance is almost 0 during the starting of motor dc motor...?

0 Answers  

---

( Re: WHAT SHOULD BE THE RATING OF MCCB FOR 415V,3Ph,50KVAR CAPACITOR BANK Answer # 1 The capacitor current would be kvar x 1000 / (415 x sqrt3). This would be 70a approx. The MCCB selected should have *atleast 1.4 times this current i.e. 1.4 x 70= 98. So you should choose at least 100 A mccb.) regarding to this answer,i would like to know why the current have to times 1.4 to get the right amphere for the mccb.hows the formula to get the 1.4??tq

2 Answers  

---

What is double throw isolator and single throw Isolator.

1 Answers   KSEB, L&T, Siemens,

---

Ferranti Effect says that voltage at the receiving end is higher than that at the sending end. How is it possible?

4 Answers  

---

DESCRIBE THE CONSTRUCTION ANDOPERATION OF BELT CONVEYORS AND SCR CONVEYORS , DRAW NEAT SKETCHES

0 Answers  

---