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Uninterruptible Power Supply (UPS)

The widespread use of power-based electronic systems in industrial plants, offices, shopping and business centers and homes has brought along many problems in terms of energy quality. Engine speed control systems, direct frequency converters, switched power supplies, circuits including power electronics elements (diodes, thyristors rectifiers, triacs etc.) and saturated magnetic circuits are harmonic generating loads. Harmonics can lead to malfunctions of microprocessor-based systems, data failures in measurement and control systems and may affect the operation of other devices connected to the system. In addition to these they cause voltage fluctuation and voltage imbalance for loads such as arc furnaces and welding machines.

 

One of the biggest problems for the users are unannounced power cuts. These cuts can be long-lived but also very short in form of micro-cuts (shorter than 20 msec), so that the user doesn't even realize them. Lightning is another problem for electrical systems. They don't need to directly affect the device in order to create a problem. Short-term lightning strokes that only last micro seconds with high energy and a high level of amplitude can cause serious problems in the hardware if the necessary precautions are not taken in the network.

 

Users are more and more affected by these power quality issues in the network. From the perspective of the users these problems are causing property damages and a loss of labor. Uninterruptible power supply systems (UPS) and UPS devices are technological devices that have been designed to protect the user from such network problems.