Jännitteenheilahtelut

Jännitteenheilahtelut, commonly known as voltage fluctuations or sags, refer to short-duration decreases in the RMS voltage level of a power system. These events are typically caused by sudden changes in load, such as the starting of large motors, or by short circuits on the power grid. The duration of a voltage fluctuation can range from half a cycle to a minute, and the voltage dip can be significant, sometimes dropping to below 90% of the nominal voltage.

These fluctuations can have various negative impacts on sensitive electrical equipment. For instance, microprocessors and control systems may malfunction or reset, leading to operational disruptions in industrial processes, computers, and telecommunications systems. Equipment that relies on precise voltage levels, such as lighting systems, can experience flickering or premature failure. In residential settings, voltage fluctuations can cause lights to dim and electronic devices to behave erratically.

The detection and analysis of voltage fluctuations are important for maintaining power quality. Utilities and industrial facilities often employ specialized monitoring equipment to record these events and identify their sources. Mitigation strategies can include improved power system design, the installation of voltage regulation equipment, and the use of uninterruptible power supplies (UPS) for critical loads. Understanding the causes and effects of jännitteenheilahtelut is crucial for ensuring the reliable operation of electrical networks and the equipment connected to them.