What is the difference between online ups and offline ups?
Answer Posted / john
Online UPS, it is getting power AC is converting to DC, then
the DC source stored to Battery at power supply on mode when
power fail, the DC sorce is changed to AC by inverter so
output power is having without noise.
OFFline UPS is having automatic voltage regulator, it
getting power from supply, it is regulated by AVR, then
power stored to battery so the change over time approx 2ms
to 5ms so change over noise comes.
Is This Answer Correct ? | 81 Yes | 43 No |
Post New Answer View All Answers
whatare the disadvantages occur,if the form factor of transmission will not be equal to 1.11
how to select electrical equipment such as fuse,dg,transformer,motor,msb,wire,cable as per the connecting load..please mention any books to design,take licence
how many Classification of fire extinguisher
Define end float in a motor?
Is potential difference materials property ..? if yes tnen how.. explain brifly.
what may the reason for vector shift in a generator?
Dg pf .71 i am improve pf 0.80 what capacitor connected in dg how?
Where should the lighting arrestor be placed in distribution lines?
What is the dc grounding system and what is diff between AC/DC grounding system?
Why we use Electrical energy rather than any other type of energy, mostly? Explain behavior of open secondary CT and short circuited secondary PT in energized condition?
Dear All, I am new in construction company , my boss ask a question at time of interview , If we have 60MW generation and Single Power Transformer step-up we have. if CMR 50/60MVA , ONAN, ONAF respectively , is it sufficient or not ? for that much power to transfer,
what is feed back and what are feed back amplifiers?
HI SIR, AM PREPARING FOR RRB FOR SECTION ENGINEER POST. PLZ SEND ME THE PREVIOUS QUESTION PAPERS AND HELP ME. I HAVE NO ENOUGH TIME MY EXAM DATE IS 22ND JUNE.... MY EMAIL ID IS nalla.amarnath@gmail.com
can we make a electric generator,which can not use any type of fuel,air,solar,gas,thermal,coal,petrol,etc and able to produce electrical energy (or self electricity generating generator)
What is phenomenon of electromagnetic induction and how it works?