To know the merit and demerit of several types of UPS systems

To know the merit and demerit of several types of UPS systems




At present, the market is flooded with different types of UPS systems, their characteristics are different. Now, APC UPS for each type are given a clear definition of the practical application of each system, and lists the advantages and disadvantages of various systems. With this information, you can make informed decisions, select the appropriate UPS topology of their needs, create efficient enterprises.

The understanding of UPS, it is also generally agreed that there are only two types, namely, back-up type UPS and Online UPS. The two commonly used terms and can not correctly describe the existing UPS system. In the correct understanding of the different types of UPS topology, you can eliminate many of the UPS system error view. UPS UPS topology refers to the basic characteristics of the design. Typically, models of different manufacturers in the design or topology very similar, but they differ in significant aspects of performance characteristics.



UPS type

There are many ways to design UPS systems, UPS designed with different performance characteristics are very different. The most common design as follows:

Reserve type

Online interactive

Backup type - FMR

Double-conversion-line

Delta Conversion On-line style



UPS back-up style



Reserve-type UPS for personal computers the most common type. Switch set to select the filtered AC input as the main power (solid line path), once the main power fails, it will switch to the battery / power inverter as the backup power supply. Once this occurs, the transfer switch must operate, the load switch to the battery / inverter backup power source (dashed path). Inverter only starts when a power failure, so called "back-up style." The main advantage of this design are high efficiency, small size and low cost. If the use of appropriate filter circuit and surge protection circuit, these systems can also provide appropriate noise filtering and surge suppression.

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