What is the difference between online ups and offline ups?
Answer Posted / martin
Online UPS is the one which gives output all the time from
battery whether there is power failure or power on. You
get backing from battery all the time.
Offline UPS supplies Mains to the output when power supply
is regular and charges batteries as well at the same time.
When power fails it switches those batteries to produce
output for power backup.
| Is This Answer Correct ? | 157 Yes | 29 No |
Post New Answer View All Answers
Can 4pole (3 phase+neautral )RCCB proper functioning in only 3 phase load (no neautral, no Earth) ?
is there any role of power factor with frequency variation? and how we can manage the frequency variation?
How time response of the system is divided?
State the points to be considered for selecting a particular type wiring.
what is the best method of grounding in 30 MW generator?
The capacitive reactance of a capacitor of 1/(2(PI)) F at 10^3 H is
We have 5 Distribution sections with variable loads&We have 3 Gensets(500kva,380kva&250kva) our total load is between 400kva to 600kva. so how could we connect 3gensets.
In a 3 phase 4-wire system. For a 3.5 core cable if all loads are single phase and balanced, what will be neutral current? will it be sum of all phase currents? Or it will be zero? And if loads are unbalanced what will be neutral current?
I have iti elec, 1st aid, and 5 yrs experience in 7.5 mw power plant. Am i eligeble for 11kv license in telangana state..when, how to apply for that.?
what is thresold of perception
What is the approximate value of stacking factor?
3 phase Motor will be given 2 phase after 2 to 5 second we given 3rd phase so Motor Run sum-time in forward or sum time run reverse direction. All time phase sequence is not change. Why motor run in reverse direction? Please Explain........
how to wiring it with contactor and timer together
for 5KW resistive load can anyone please suggest me whether to go for UPS/Inverter or Generator depending upon cost calulations
Whether should be the oil level in OCTC transfomer? It should be upto winding immersed completely or should be upto tap changer s/w? How it will affect the performance of the transformer. Rating may be 33KVA