Three-phase power networks have enormous savings potential. In practice, however, not enough attention is paid to power quality. The result is energy losses in the network, low efficiency and problems with frequency inverters.

Power analysis and power-logging

Voltage and current distortions, harmonics and flicker are the most common causes of energy loss. Asymmetrical flow in three-phase networks adversely affects the efficiency of motors and increases the proportion of reactive power. In order to perform a careful analysis of power quality, approx. 300 parameters need to be logged and analysed.
 The parameters must be logged over an extended period of time in order to capture the start and stop phases of the motors in the system. In an industrial plant, transient over-voltages often occur when high-power consumers are switched on or off. Such transients must be identified and the cause resolved.