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.

What is the angle of inclination for the oil connection from transformer conservator to Bucholz relay and why?

0 Answers   Alam Group of Companies,

hi i am aziz electrical associate engineer. i am faceing problem in acs800 vvvf drive.it is tripping wothout any alarm/fault.i cheaked all parameters and fault function of drive, all are correct as well as communication parameters.but still it is tripping (drive is tripping in running position not in starting)

1 Answers  

In power transformer YnD0 Vector Group is possible or not? if possible, what will be the vector diagram and what are the conditions?

2 Answers  

i've iocl interview.. if you know the interview process please give me information..

0 Answers  

for 12KW motor which cable size has to select for ex.10 meter.

4 Answers  

RESISTONS R1 AND R2 in parallel = Total R.? 1-R=R1+R2 2-R=1/R1 + 1/R2 3-1/R + R1+R2 R=R1R2/R1+R2 select one

2 Answers   BSNL, PGVCL Paschim Gujarat Vij Company Limited, TCS, Wartsila,

How to discharge the battery as quickly as possible ?

1 Answers  

what effect will 10 milliampere current cause to human body ???

1 Answers  

what is vibration?

2 Answers  

What is the recommended voltage gap between Live and Earth and ,Earth and Neutral.If these are exceded what is the solution.

2 Answers  

Why in KVA diesel engine? Why not KW

3 Answers  

whether the battery is voltage source or current source?

2 Answers