Answer / thowsif

For the Operation UPS Battery is Essential,

UPS Will work without a Battery also,but in event of Power
Faulure it will not supply the power to the load as thier
is No Backup Power..

Answer / prakash veer singh

These system is not working . Because battery is part of
those system. without battery these system is not complete.

Answer / bala.a

yes mr . Ram statment is correct . This system is working
in Nokia compus- chennai

Answer / ramakrishnan

UPS can Work without battery by using a technology called
FLYWHEEL where it can give a back-up of 20secs.

This system is currently working in france and also in some
other countries where Auto transfer switches ON their DG
within 10secs whenever the EB fails.

Answer / ram

Mr.Bala Can i know the brand of UPS working in Nokia

why celing fan is running in anti clock wise and table fan is running in clock wised?

5 Answers  

function of apfc pannel

3 Answers  

Metal covered multiconductor cables shall employ a marker tape located within the cable running for its complete length in lieu of cable surface marking. Is it true or false?

0 Answers  

In an alternator running with a balanced zero p.f. lagging load, phase differernc between the resultant armature flux and main field flux is always____? options is 180 degree....why?? explain.

1 Answers   BREB,

If I have a motor of 1MW with 6.6kv, running at 35% load, how can i save energy without reducing the load ?

2 Answers   Reddy Labs,

why odd hormonics only will effect the power system.why not even hormonics

2 Answers  

why single CT used in DOL starter power circuit?

0 Answers  

if three phase supply is given to single phase transformer, what will happen?

3 Answers  

When a capcitor is used on 440 v thenthis is kvar rating 25kvar .my question is that when we use this capcitor  use 480 v &525 volt .how much kvar increase . Plz give my question ans. And give answer with formula .my mail id is rohitashsaini013@gmail.com

1 Answers   Neptune,

how much kn lightning arrestor is used in 11kv line

8 Answers   Power Grid,

in ac system the current wave form becomes zero for every half cycle then how can we get continuous supply can any one answer to this plsss

2 Answers  

What is corona ? Mention its positve effects .

1 Answers