Interested to Buy Any Domain ? << Click Here >> for more details...
Answer Posted / 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.
| Is This Answer Correct ? | 9 Yes | 24 No |
Post New Answer View All Answers
How can claculate to attain the desired PF in the line ( HOW Much KVAR is required ) Pls Give the formula? Equate Petrochemical 0 1 how to calculate sizing of NGTR (Transformer rating,Loading resistor value and Current rating of resistor) and what is the X/R ratio. Details : 11kV,Capacitance 1.73532 micro farads,40kA for 1sec. 0 1 What will happened. if we feed 3phase supplay to the stater with out insert the rotor. How much current will flow through the stater winnding? Equate Petrochemical 0 1 What is required of exietation to the alternater. 0 1 why star point of HT motor not earthed? Equate Petrochemical 0 1 Why we are getting low voltage in star connection? Equate Petrochemical 0 2 What's ND relay & it's functions? Equate Petrochemical 0 2 How instantanious short circuit current is calculated? its formula? Equate Petrochemical 0 2 What is servo Motor? What's the advantages of this motor over Induction motor? Equate Petrochemical 0 2 What is core CT & it's function? Equate Petrochemical 0 3 what is meant by star/delta voltages as 440/220 in a 3 phase induction motor, and why it should be connected on STAR IN 3 PHASE SUPPLY L & T 0 4 What is required of exietation to the alternater. KNB 1 23 what is the design voltage for 6.6KV 2000 KVAR HT capacitor? Consultancy 0 3 Pls explain about vfd control?Where it is used, Give some example? siemens 1 22 Please explain me abt PQ diagaram in the power sector. 0 9
is oil viscosity affect on motor current?
what will be the maximum winding temperature of 6.6kv HT motor 450kw, Full load current 49A. 50Hz Frequency.
what is the IPC ? & what the uses ?
for a 400kv t/m line with 10 ampere current will corona occur?
What is Surge Capacitor? Why it is require in Generator Circuit Breaker,inspite of surge arrester?
Why back emf used for a dc motor? Highlight its significance.
It is desired to flood light the front of a building 42 meters wide and 16 meters hig.Projectors of 30 degree beam spread and 1000 watt lamps giving 20 lumen/watt are availabl.If the desired level of illumination is 75 lumen/m and show a suitable scheme.Assume the cofficient of utilization, deprecitation factor and waste light factor are 0.4, 13 and 1.2 respectively.
What types of high speed CMOS circuits have you designed?
How can we calculate the motor frame sizes?
What are the three major categories of error?
for 11KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV OH system what will be typical per KM "R" "L" "C" parameter. for 33KV UG system what will be typical per KM "R" "L" "C" parameter.
when we have to purchase the transformer by own i.e how much load will preferred HT connection?
why would the rotor rotate at sub synchronous speed against the direction of rotating flux when d rotor of 3 phase IM is connected to 3 phase balanced supply and the stator windings are shortcircuited ??
how to make an earthing certificate
