The most common disturbances in supply networks are short-term voltage dips. They can be caused by inrush currents from capacitors, motors or large transformers. However, most voltage dips are due to short circuits or earth faults in the grid, often many kilometers away from where they occur. They usually last only a fraction of a second, but can lead to major problems. A voltage drop of just 100 milliseconds can have serious consequences, for example for the manufacturing industry. The high degree of automation of individual processes and continuously running production lines requires an absolutely stable, trouble-free environment. This is the only way companies can ensure the highest product quality and a minimum of rejects. In the worst case, a 100-millisecond disturbance can result in hours of production downtime. Systems for an uninterruptible power supply can be used to compensate for short-term voltage dips.

The ultracapacitor-based UPS solution is specially designed to bridge short voltage dips of up to 10 seconds in low-voltage and medium-voltage networks. It reacts to occurring voltage dips or micro-interruptions and automatically takes over the load supply in less than 10 milliseconds. In this process, the power supply is disconnected from the public grid and a separate isolated grid is generated using the energy stored in the ultracapacitors. If the transmission grid provides the required voltage again, the system automatically synchronizes with the public grid within a few milliseconds and re-establishes the connection to it.