Answer / ram

ya i thing is correct

Answer / taylor

thanx guys b cas of ya ans i m able 2 complete my projeck
so thanx!!!!!!!!!!1

Answer / rohit singla

UPS is an electronic device which functions as alternative
power source which supply power continuosly to the senstive
electronic devices under circumstances

Answer / chandrahasan

The main building blocks of any given UPS (on-line, off-line
or stand-by) are the charger, inverter, static switch or
static disconnect and battery. The charger converts AC to DC
power which float charge is the battery and feeds
the inverter. The inverter converts DC to AC power, and the
static switch or static disconnect is a solid-state device
used to apply or disconnect AC power. The battery stores DC
power that is used as a back-up power source when
the utility power is not available.

Answer / rk mehta

dear sir,
I have a 2.5kva uniline ups,which works on 148 dc
source, but at present i donot have dc power source, now on
connecting it on ac source it gives indication of presence
of line but on pressing start button nothing happens. is it
possible to switched on the same ups without connecting the
dc source.

how can H.V busbar in a powerstation can be protected?

1 Answers   Unitech,

sir please send me iocl written test paper in my e-mail account. i'll be obliged to you........ thank u roshan

0 Answers   IOCL,

What do you mean by distribution transformers?

0 Answers  

what is self commutation how a thyristor discharges through a capacitor and inductor

3 Answers  

what take 100 w take current

1 Answers   SoftLogic,

which one is dangerous AC Power r DC Power for Electrical Shock ?

10 Answers  

in magnetic field we send current to generate flux,why not voltage?

2 Answers  

1.What will be stored in online ups EPROM IC?

0 Answers   IBM,

why field resistance is higher than armature resistance in dc machines? and why filed resistance is kept at min value at starting in same time of armature resistance at max value?

4 Answers  

The Frequency is measured by _________ bridge ?

3 Answers  

how to calculate micom relay earth falt time and current sertting

0 Answers  

Installation method of self treated earth electrode.

0 Answers