Category: Power quality analysis
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Softstart
Power quality in industrial facilities is threatened by the commonly occurring starts of high power drives. This causes frequent and deep voltage dips causing the effect of the bothersome flicker. These phenomena in industrial facilities, with a large number of devices with similar properties, become very burdensome and may threaten the health and life of…
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Unjustified tripping of overcurrent protection
The functioning of energy distribution systems ensuring both reliability and durability in normal and emergency states, requires the use of protective elements. Proper selection of parameters and settings requires detailed knowledge of the character and variability ranges of individual parameters. The wrong selection may be indicated by unjustified activation of the protection. Description of the…
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Inrush current! Consequences, measurements, analysis
Unexpected protection failures! Inactivation of devices! Voltage dips! Flickers! What are inrush currents? Each device powered by electricity experiences a moment when it begins to draw power from the network, which causes the physical effect of increasing current. Examples include starting the drive under load, starting engine at idle, turning on the lights, activating additional…