The complete form of UPS is an uninterruptible power supply or an uninterruptible power supply. It is an electrical device that provides emergency power to various loads when there is generally no input power. A Managed Ups Services differs from an emergency power system in that it provides almost instantaneous protection against i / p power failures by supplying the energy stored in batteries, supercapacitors. Battery run times are relatively short for most UPS, but sufficient to enable backup power. The main purpose of a UPS is to protect equipment such as computers, electrical equipment, computers, and data centers when a power outage occurs. This device keeps the computer running for several minutes after a power outage and protects the data on the computer. Today, there are several types of UPS systems with a software component that allows you to back up your vehicle in the absence of a power outage while you are away from your computer.
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Below is a schematic diagram of a UPS, showing how the equipment's batteries function during a power outage. The input voltage of the primary winding of the transformer (TR1) is 240V. The transformer secondary winding (TR2) can be increased to 15V if the value is at least 12V to 2A. A fuse is used to protect the owl circuit from short circuits. The presence of electricity will make led1 shine. The LED turns off when the power is off and the UPS battery replaces it. This circuit is designed to provide a more flexible circuit where it can be modified with different batteries and regulators to provide both regulated and unregulated voltage. By using two 12V batteries in series and the positive input from the 7815 regulators, we can drive the 15V supply.
Power outages can take many forms such as surges, sags, surges, and harmonics. These problems can cause serious damage to electrical transmissions, especially during the critical manufacturing or handling phases of action. To reduce the risk of power distortion, UPS systems are often integrated into electrical networks. Manufacturers of electronic power supply equipment can provide a high-quality steady flow of power for a variety of electrically charged devices, and these devices are commonly used in industrial applications, medical services, emergency equipment, telecommunications, and computerized systems.
Uninterruptible power supplies are classified into three types:
- Standby UPS
- Line-interactive UPS
- Online UPS
A redundant uninterruptible power supply is also called a standalone UPS, which is commonly used for a PC. The block diagram of this UPS is shown below. This UPS includes a battery, an AC / DC / DC / AC inverter, a static switch, and an LPF that is used to reduce the switching frequency of the output voltage and a surge suppressor. The backup UPS system works with a transfer device. to select AC I / P as the main power source and switch to battery and inverter as backup sources in case of main power failure. The inverter generally operates in standby mode, it only operates in case of power failure.
The Line Interactive UPS block diagram shown below is the most common UPS used for small businesses. The line-interactive UPS design is similar to the standby UPS, furthermore, the line-interactive design generally includes an automatic voltage regulator (AVR) or a switching transformer. This improves voltage regulation by adjusting the transformer taps when the i / p voltage changes. Voltage regulation is an important function when there is low voltage, otherwise the UPS would switch to battery and eventually disconnect the load. Using a more common battery can lead to premature battery failure. The characteristics of this UPS are small.
Online UPS is also called online double conversion uninterruptible power supply. This is the most widely used UPS, the block diagram of which is shown below. The design of this UPS is similar to a standby UPS, except that the main power source is the inverter and not the AC grid. In this UPS design, an AC i / p failure does not cause the transfer switch to trip because the AC i / p charges the backup battery source that supplies power to the inverter. Therefore, when AC i / p power is disconnected, this UPS operation does not generate transfer time.