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Construction Of Uninterruptible Power Supply
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Inverters allow the user to
provide AC power in areas where only batteries can be made available,
allowing portability and freeing the user of long power cords. However,
most UPS units are also capable in varying degrees of correcting common
utility power problems like:
1. Power failure: defined as a total loss of input voltage.
2. Surge: defined as a momentary or sustained increase in the mains voltage.
3. Sag: defined as a momentary or sustained reduction in input voltage.
4. Spikes, defined as a brief high voltage excursion.
5. Noise, defined as a high frequency transient or oscillation, usually injected into the line by nearby equipment.
6. Frequency instability: defined as temporary changes in the mains frequency.
7. Harmonic sinusoidal waveform distortion: defined as a departure from the ideal expected on the line
Factors to consider when designing an inverter is
· The input voltage
· The output voltage
· The frequency of the oscillators
· The rating of the load to be powered by the inverter
· The ampere range of the charging unit
· The cost of the construction
· The relative importance of the inverter
· The ampere ranger of the charging unit
· The cost of the construction
· The relative importance of the inverter at that time specification
· D.C input voltage (12V-24V)
· A.C output voltage (220v-240v)
· Output frequency (50Hz-60Hz)
· Output power (450-550)
· Maximum power (550)
· Continuous output power (500)
· Overload shutdown
· Low voltage shutdown
1.11 AIMS AND OBJECTIVES
The objective of this project may be summarized as listed below
· To give a brief introduction on what UPS.
· To highlight the basic components used in the construction of a UPS and their functions .
· To describe the way in which there are designed and
· Finally to highlight its application and relevance in the society
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ABSRACT - [ Total Page(s): 1 ]Uninterruptible power supplies (UPS) are used to provide power when regular utility power is unavailable. Although they are commonly used for providing power in remote locations or emergencies, this is not because they are the same as auxiliary power units, emergency power units or standby generators.Unlike the aforementioned power sources, UPS provides an immediate and continuous supply of power to a device, hence protecting it from power interruption and allowing time for auxiliary or emerge ... Continue reading---
