what is UPS ?

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what is UPS ?

asked Aug 18, 2017 by anonymous

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what is UPS and what are its uses?

Description : what is UPS and what are its uses?

Answer : Ups means uninterrupted power supply It supplies power when there is power supply outage. This is done by storing power in battery banks while power is on and then during power outage the DC in battery is converted to a.c by inverters

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What is the need of UPS?

Description : What is the need of UPS?

Answer : 1) An Uninterruptible Power Supply (UPS) is used to protect critical loads from mains supply problems including spikes, voltage dips, fluctuations and complete power failures using a dedicated battery. 2)A UPS system can also be used as standby system when AC mains is failed.

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Describe working of online UPS. List any two applications of UPS.

Description : Describe working of online UPS. List any two applications of UPS.

Answer : Online UPS: The block diagram of the on line UPS systems is as shown, where the load is connected to the invertor through the UPS static switch. The UPS static switch is ... 4) Healthcare: hospitals, clinics and retirement homes 5) Telecommunications 6) Special projects (events)

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Explain the operation of UPS with a neat block diagram.

Description : Explain the operation of UPS with a neat block diagram.

Answer : Uninterruptible-Power-Supplies (UPS): A block diagram of UPS system is shown in figure. It essentially consists of four major components: i)Rectifier (or battery charger) ii) ... . Due to fast action requirement, transfer switch can be implemented by fast acting semiconductor devices.

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Define transfer time and back up time of UPS.

Description : Define transfer time and back up time of UPS.

Answer : Transfer time of UPS: The transfer time, sometimes also called switchover time, is the amount of time the UPS will take to switch from utility to battery supply during a mains failure, or from battery to ... is the amount of time for which the UPS will supply the power to load during mains failure.

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How to do push-ups from the floor?

Description : How to do push-ups from the floor?

Answer : How to do push-ups from the floor? Physical self-improvement with the help of strength exercises is quite popular today. The incentives to start such work are varied - solving health problems, body ... any special equipment in your usual home environment. Go in for sports, be healthy and happy!

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An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a : (1) Power transmittor (2) Battery (3) Uninterrupted power supply (UPS) (4) Generator

Description : An electrochemical cell which is used as a source of direct electrical current at constant voltage under standard conditions is called a : (1) Power transmittor (2) Battery (3) Uninterrupted power supply (UPS) (4) Generator

Answer : Battery

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The economist who believed that unemployment is impossible and that market mechanism has a built in regulatory system to meet any ups and downs (1) J.M.Keynes (2) Ohlin (3) J.B.Say (4) Galbraith

Description : The economist who believed that unemployment is impossible and that market mechanism has a built in regulatory system to meet any ups and downs (1) J.M.Keynes (2) Ohlin (3) J.B.Say (4) Galbraith

Answer : J.B.Say

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State any three points of difference between online UPS and off-line UPS.

Description : State any three points of difference between online UPS and off-line UPS.

Answer : On-line UPS Off-line UPS An on-line UPS continuously powers the protected load from its reserves (usually lead-acid batteries or stored kinetic energy), while simultaneously replenishing the ... the mains power. In this type of UPS frequency stability is always available.

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With the help of diagram explain working of UPS

Description : With the help of diagram explain working of UPS

Answer : The UPS delivers uninterrupted power to the ac load. It consists of the following functional blocks: AC mains section contains filter, transformer and rectifierIt receives ac supply, ... has synchronization circuits for smooth change-over from mains to inverter ac avoid waveform distortion.

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A UPS : .......................

Description : A UPS : A) increases the storage capacity of a computer system B) increases the process speed C) provides backup power in the event of a power cut D) increases I/O speed

Answer : A UPS : provides backup power in the event of a power cut

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A UPS commonly has following parts : (i) rectifier (ii) inverter (iii) static switch Which of the following is true ?

Description : A UPS commonly has following parts : (i) rectifier (ii) inverter (iii) static switch Which of the following is true ? (a) only (i) (b) only (i) and (ii) (c) (i), (ii) and (iii) (d) only (ii) and (iii)

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What is the use of power factor correction?

Description : What is the use of power factor correction?

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What is the best power factor?

Description : What is the best power factor?

Answer : It is unity power factor but difficult to achieve in dynamic loads

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What is power factor angle?

Description : What is power factor angle?

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What is difference between KW and KVA?

Description : What is difference between KW and KVA?

Answer : kW is kilowatt and kVA is kilovolt ampere. kW is unit of real power and kVA is unit of Apparent power.

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What is a digital power meter?

Description : What is a digital power meter?

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What is an RF Power Meter?

Description : What is an RF Power Meter?

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What causes random power outages?

Description : What causes random power outages?

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What is mitigation of harmonics?

Description : What is mitigation of harmonics?

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What is the difference between linear and nonlinear electrical loads?

Description : What is the difference between linear and nonlinear electrical loads?

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What is current harmonics?

Description : What is current harmonics?

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What is a non linear load?

Description : What is a non linear load?

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What is the advantage of high power factor?

Description : What is the advantage of high power factor?

Answer : Reduced copper losses Smaller conductor size Improve voltage regulation Increase system capability Less energy bill

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What is meant by KVA?

Description : What is meant by KVA?

Answer : KVA - kilo volt ampere Used to specify the transformer details

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What is the cause of voltage fluctuation?

Description : What is the cause of voltage fluctuation?

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What are even and odd harmonics?

Description : What are even and odd harmonics?

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What are the main causes of harmonics?

Description : What are the main causes of harmonics?

Answer : Harmonic is a non linear load because linear load voltage deviated due to connection of some electrinie device such as converter,inverter

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Description : What is power logger?

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Description : What does an electric meter measure?

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What are the power quality disturbance?

Description : What are the power quality disturbance?

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What is harmonic in power quality?

Description : What is harmonic in power quality?