Can without battery on line UPS,off line UPS or Invertor
works please brief.
Answer Posted / 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.
| Is This Answer Correct ? | 1 Yes | 1 No |
Post New Answer View All Answers
How can i get my certificate of competency as an electrical supervisor? I have complicated my B.Tech from Uttarakhand technical university this year (2012).
Draw the wave shape of armature current in a generator subjected to a sudden three phase short- circuit at its terminals. Define various reactance of generator from this wave shape.
how the speed of the gets motor regulated. does it draw the same current on the all speed level.
differnce between single acting and double acting solenoid valves
Why an ac systems are preferred over dc systems?
What would cause a 240v choke that should give 110v out on a 16w lamp to gradually increase to 160v?
Draw transformer phasor diagram.(full load,no load)
what is stper motor
How can we calculate cable size in Low voltage & high voltage
impliment (AB)`+C to transistor representation
What is meant by stator?
In EHV transmission line a neutral grounding reactor is often placed at neutral point of shunt reactors. What is the recommended protection for this neutral grounding reactor? Should I use a fast closing switch to bypass neutral grounding reactor when this protection operates?
True or false question. 1.The fuse provide phase and neutral 2.power loss in electrical circuit can take place in (resistance or inductance or capacitance). 3.two phase system each phase has separated by a phase difference of (90 or 180 or 270 or 45). 4.3 phase balanced star connected load neutral current shall be (line current or phase current or zero or unity)
Can any answer me ,What will be the range of C.T coil for L&T energy meter EM301 used for 180 kva DG set
What do you mean by reach and reach the point of the relay?