Voltage depressions and dips are costly because the availability of high quality power supplies is a must if production and control systems are to run optimally.

However, against the background of energy market liberalization, problems with power quality have been growing in recent years.  The greater number of converter-fed drives and more widespread use of sensitive loads (such as computer networks) have contributed to a sharp increase in the harmonic content of main power supplies.

Reducing the reactive power component and the harmonics in the supply is essential both economically and technologically.  This reduction helps achieve maximum plant and equipment utilization and therefore is a significant overall economic factor.

Siemens power quality measuring and recording instruments help with the detection of voltage dips, power failures, voltage overshoot, harmonics, flicker, and their associated trends.  Upon detection, Siemens employs automatic analysis to identify an appropriate means of correction.