How does an uninterruptible power supply operate?

How does an uninterruptible power supply operate?
by

1 Answer

Answer :

An uninterruptible power supply (or UPS) operates, in most cases, as a specialized battery for the computer. The computer will be plugged into the UPS battery. And when the power goes down or surges, the UPS will take over and supply power at the proper voltage.
by

Related questions

What features should I look for in a UPS (uninterruptible power supply)?

Description : What features should I look for in a UPS (uninterruptible power supply)?

Last Answer : answer:If that's all you need the UPS for: to handle tiny burps' in the power supply, then you can get by with the cheapest, most generic UPS that you can find. Seriously. You need next to ... 'd have switched to a laptop long ago (which is my home computer now, anyway) for just that reason.

How much does an uninterruptible power supply usualy cost?

Description : How much does an uninterruptible power supply usualy cost?

Last Answer : The price of a UPS is based on 3 factors: power rating, battery capacity, and warranty. A small 230Watt 4.5Ah system is as low as $37 and can go up exponentially.

Why You Need an Uninterruptible Power Supply?

Description : Why You Need an Uninterruptible Power Supply?

Last Answer : Hardware may be damaged and files may be lost if computer systems are not properly shut down. An uninterruptible power supply, or UPS, is designed to give computer users enough time ... users thousands when considering the cost of replacing damaged hardware and unrecoverable data from working files.

UPS is now widely use in households. What does UPS stands for ? A. Uniform Power Storage B. Universal Product Support C. Under Panel Storage D. Uninterruptible Power Supply (Answer)

Description : UPS is now widely use in households. What does UPS stands for ? A. Uniform Power Storage B. Universal Product Support C. Under Panel Storage D. Uninterruptible Power Supply (Answer)

Last Answer : D. Uninterruptible Power Supply (Answer)

If field excitation is suddenly lost to an alternator operating in parallel, that alternator will _____________. A. supply excessive current to the bus B. operate at the same load, but with reduced voltage C. lose its load and tend to overspeed D. become overloaded and slow down

Description : If field excitation is suddenly lost to an alternator operating in parallel, that alternator will _____________. A. supply excessive current to the bus B. operate at the same load, but with reduced voltage C. lose its load and tend to overspeed D. become overloaded and slow down

Last Answer : Answer: C

Purpose of hydraulic accumulator is to (A) Ensure intermittent supply of hydraulic pressure (B) Increase the pressure and store/ accumulate it (C) Accumulate pressure to increase force (D) Generate high pressure to operate hydraulic machines like cranes, lifts, presses etc

Description : Purpose of hydraulic accumulator is to (A) Ensure intermittent supply of hydraulic pressure (B) Increase the pressure and store/ accumulate it (C) Accumulate pressure to increase force (D) Generate high pressure to operate hydraulic machines like cranes, lifts, presses etc

Last Answer : (D) Generate high pressure to operate hydraulic machines like cranes, lifts, presses etc

A shuttle valve will: a. Allow the accumulator to be emptied after engine shut down b. Reduce pump loading when normal system pressure is reached c. Automatically switched to a more appropriate source of hydraulic supply d. Operate on a rising pressure, higher than the Full Flow relief valve

Description : A shuttle valve will: a. Allow the accumulator to be emptied after engine shut down b. Reduce pump loading when normal system pressure is reached c. Automatically switched to a more appropriate source of hydraulic supply d. Operate on a rising pressure, higher than the Full Flow relief valve

Last Answer : c. Automatically switched to a more appropriate source of hydraulic supply

A shuttle valve will: a. Allow the accumulator to be emptied after engine shut down b. Reduce pump loading when normal system pressure is reached c. Automatically switched to a more appropriate source of hydraulic supply d. Operate on a rising pressure, higher than the Full Flow relief valve

Description : A shuttle valve will: a. Allow the accumulator to be emptied after engine shut down b. Reduce pump loading when normal system pressure is reached c. Automatically switched to a more appropriate source of hydraulic supply d. Operate on a rising pressure, higher than the Full Flow relief valve

Last Answer : c. Automatically switched to a more appropriate source of hydraulic supply

A single phase transformer is designed to operate from 50 Hz, 1100 V supply and to have an output voltage

Description : A single phase transformer is designed to operate from 50 Hz, 1100 V supply and to have an output voltage of 240 V at no load. The core has mean area of 30 cm2 and the flux density has not to exceed 1.3T. The number of secondary turns will be (a) 1270 (b) 1017 (c) 768 (d) 277  

Last Answer : E2=e2=4.44*flux*N2*f=240 V Flux=Flux density* Area Area=30 cm2  =30*10-4 m2 Flux= 1.3*30*10-4  Wb=39*10-4 Wb E=240= 4.44*39*10-4 *N2*50      N2=277.

Two 550 kVA alternator operate in parallel to supply the following loads ...

Description : Two 550 kVA alternator operate in parallel to supply the following loads I. 250 KW at 0.95 p.f. lagging II. 100 KW at 0.85 p.f. leading One machine is supplying 200 KW at 0.9 p.f. lagging. The p.f. of other machine must be

Last Answer : Two 550 kVA alternator operate in parallel to supply the following loads I. 250 KW at 0.95 p.f. lagging II. 100 KW at 0.85 p.f. leading One machine is supplying 200 KW at 0.9 p.f. lagging. The p.f. of other machine must be 0.89 leading

Do all PLCs have to have power to operate?

Description : Do all PLCs have to have power to operate?

Last Answer : What is the answer ?

The winch shown in the illustration will not operate in any speed in the lowering direction and at an abnormal speed in 'first point hoist'. The possible cause is that _______________. EL-0102 A. contactor coil '3M' has many shorted turns B. resistor 'R8-A2' has an open C. contacts '1M' in the power circuit are badly corroded D. master switch contacts 'MS6' have weak springs

Description : The winch shown in the illustration will not operate in any speed in the lowering direction and at an abnormal speed in 'first point hoist'. The possible cause is that _______________. EL-0102 A. ... '1M' in the power circuit are badly corroded D. master switch contacts 'MS6' have weak springs

Last Answer : Answer: B

Why is it desirable to operate paralleled AC generators at the same power factor? A. Circulating currents are kept to a minimum. B. Field excitation losses are kept to a minimum. C. Generator rotors will have a lesser tendency to hunt. D. Because a power factor increase will decrease kilowatt output.

Description : Why is it desirable to operate paralleled AC generators at the same power factor? A. Circulating currents are kept to a minimum. B. Field excitation losses are kept to a minimum. C. Generator ... will have a lesser tendency to hunt. D. Because a power factor increase will decrease kilowatt output.

Last Answer : Answer: A

Power necessary to operate the horn relay shown in the illustration ____________. EL-0093 A. comes from each station's magneto B. is supplied from a 115 volt source C. is conducted through the relay's contacts D. also lights lamps 'R' and 'T'

Description : Power necessary to operate the horn relay shown in the illustration ____________. EL-0093 A. comes from each station's magneto B. is supplied from a 115 volt source C. is conducted through the relay's contacts D. also lights lamps 'R' and 'T'

Last Answer : Answer: A

Power necessary to operate the horn shown in the illustration _____________. EL-0093 A. comes from each station's magneto B. is supplied from a 115 volt source C. is conducted through a relay coil D. also lights lamps 'R' and 'T'

Description : Power necessary to operate the horn shown in the illustration _____________. EL-0093 A. comes from each station's magneto B. is supplied from a 115 volt source C. is conducted through a relay coil D. also lights lamps 'R' and 'T'

Last Answer : Answer: B

Which of the following statements is true concerning all three-phase alternators? A. Each has three separate but identical armature windings acted on by one system of rotating magnets. B. Each has one armature winding acted on by three identical but separate systems of rotating magnets. C. All three-phase alternators are designed to operate with a 0.8 leading power factor. D. The three phases always provide power to the load through three sets of slip rings and brushes.

Description : Which of the following statements is true concerning all three-phase alternators? A. Each has three separate but identical armature windings acted on by one system of rotating magnets. B. Each has one ... The three phases always provide power to the load through three sets of slip rings and brushes.

Last Answer : Answer: A

The purpose of the capacitor within component 'B' of the circuit shown in the illustration is to ____________. EL-0081 A. prolong the life of the component's contacts B. discharge the neon within the envelope C. counteract the inductive reactance in the circuit D. store power to operate the circuit should 'D' open

Description : The purpose of the capacitor within component 'B' of the circuit shown in the illustration is to ____________. EL-0081 A. prolong the life of the component's contacts B. discharge the neon within ... the inductive reactance in the circuit D. store power to operate the circuit should 'D' open

Last Answer : Answer: A

What is antenna bandwidth? A. Antenna length divided by the number of elements B. The angle between the half-power radiation points C. The angle formed between two imaginary lines drawn through D. The frequency range over which an antenna can be expected to operate satisfactorily

Description : What is antenna bandwidth? A. Antenna length divided by the number of elements B. The angle between the half-power radiation points C. The angle formed between two imaginary lines drawn through D. The frequency range over which an antenna can be expected to operate satisfactorily

Last Answer : D. The frequency range over which an antenna can be expected to operate satisfactorily

With regard to the physics of power systems used operate robots, which statement or statements are most correct? a) hydraulics involves the compression of liquids b) hydraulics involves the compression of air c) pneumatics involve the compression of air d) chemical batteries produce AC power

Description : With regard to the physics of power systems used operate robots, which statement or statements are most correct? a) hydraulics involves the compression of liquids b) hydraulics involves the compression of air c) pneumatics involve the compression of air d) chemical batteries produce AC power

Last Answer : c) pneumatics involve the compression of air

With regard to the physics of power systems used operate robots, which statement or statements are most correct? A : hydraulics involves the compression of liquids B : hydraulics involves the compression of air C : pneumatic involves the compression of air D : chemical batteries produce AC power

Description : With regard to the physics of power systems used operate robots, which statement or statements are most correct? A : hydraulics involves the compression of liquids B : hydraulics involves the compression of air C : pneumatic involves the compression of air D : chemical batteries produce AC power

Last Answer : C : pneumatic involves the compression of air

With regard to the physics of power systems used operate robots, which statement or statements are most correct? A : hydraulics involves the compression of liquids B : hydraulics involves the compression of air C : pneumatic involves the compression of air D : chemical batteries produce AC power

Description : With regard to the physics of power systems used operate robots, which statement or statements are most correct? A : hydraulics involves the compression of liquids B : hydraulics involves the compression of air C : pneumatic involves the compression of air D : chemical batteries produce AC power

Last Answer : C : pneumatic involves the compression of air

With regard to the physics of power systems used operate robots, which statement or statements are most correct? A : hydraulics involves the compression of liquids B : hydraulics involves the compression of air C : pneumatic involves the compression of air D : chemical batteries produce AC power

Description : With regard to the physics of power systems used operate robots, which statement or statements are most correct? A : hydraulics involves the compression of liquids B : hydraulics involves the compression of air C : pneumatic involves the compression of air D : chemical batteries produce AC power

Last Answer : C : pneumatic involves the compression of air

With regard to the physics of power systems used operate robots, which statement or statements are most correct? A : hydraulics involves the compression of liquids B : hydraulics involves the compression of air C : pneumatic involves the compression of air D : chemical batteries produce AC power

Description : With regard to the physics of power systems used operate robots, which statement or statements are most correct? A : hydraulics involves the compression of liquids B : hydraulics involves the compression of air C : pneumatic involves the compression of air D : chemical batteries produce AC power

Last Answer : C : pneumatic involves the compression of air

Power tillers operate most satisfactory with? 1. Rotary tillage 2. Plough 3. Transport carts 4. reapers

Description : Power tillers operate most satisfactory with? 1. Rotary tillage 2. Plough 3. Transport carts 4. reapers

Last Answer : ans 1

Which component of seed drill is used for transmit power to operate seed dropping mechanism. a) Frame b) Transport wheel c) Seed box d) Covering device

Description : Which component of seed drill is used for transmit power to operate seed dropping mechanism. a) Frame b) Transport wheel c) Seed box d) Covering device

Last Answer : Transport wheel

Power tillage operate most satisfactory with A. Rotary tillage B. Plough C. Transport carts D. Reapers

Description : Power tillage operate most satisfactory with A. Rotary tillage B. Plough C. Transport carts D. Reapers

Last Answer : Rotary tillage

Power tillers operate most satisfactory with? A. Rotary tillage C. Plough B. Transport carts D. Reapers

Description : Power tillers operate most satisfactory with? A. Rotary tillage C. Plough B. Transport carts D. Reapers

Last Answer : Rotary tillage

Air blast circuit breakers for 400 kV power system are designed to operate in (a) 100 microsecond (b) 50 millisecond (c) 0.5 sec (d) 0.1 sec

Description : Air blast circuit breakers for 400 kV power system are designed to operate in (a) 100 microsecond (b) 50 millisecond (c) 0.5 sec (d) 0.1 sec

Last Answer : (b) 50 millisecond

Burden of a protective relay is the power (a) required to operate the circuit breaker (b) absorbed by the circuit of relay (c) developed by the relay circuit (d) none of the above

Description : Burden of a protective relay is the power (a) required to operate the circuit breaker (b) absorbed by the circuit of relay (c) developed by the relay circuit (d) none of the above

Last Answer : (b) absorbed by the circuit of relay

What meters operate from their own power sources?

Description : What meters operate from their own power sources?

Last Answer : Self-excited.

What meters operate from their own power sources?

Description : What meters operate from their own power sources?

Last Answer : Self-excited.

It takes 500 watts to operate a machine whose power output is 480 watts. Which of the following is the efficiency of the machine? Is it w) 20% x) 48% y) 96% z) 98%

Description : It takes 500 watts to operate a machine whose power output is 480 watts. Which of the following is the efficiency of the machine? Is it w) 20% x) 48% y) 96% z) 98%

Last Answer : ANSWER: Y -- 96%

To reverse the direction of rotation of a three-phase AC induction motor, do one of the following: w) reverse any two of the three-phase connections x) change the frequency of the applied AC power y) operate the motor below the stall torque at very high slip z) none of the above

Description : To reverse the direction of rotation of a three-phase AC induction motor, do one of the following: w) reverse any two of the three-phase connections x) change the frequency of the applied AC power y) operate the motor below the stall torque at very high slip z) none of the above

Last Answer : ANSWER: W -- REVERSE ANY TWO OF THE THREE-PHASE CONNECTIONS 

For power factor correction, synchronous motors operate at?

Last Answer : For power factor correction, synchronous motors operate at no-load and greatly over-excited fields.

Air blast circuit breakers for 400 kV power system are designed to operate in?

Last Answer : Air blast circuit breakers for 400 kV power system are designed to operate in 50 millisecond.