Power quality determines the fitness of electric power to consumer devices. Synchronization of the voltage frequency and phase allows electrical systems to function in their intended manner without significant loss of performance or life.
No power source is perfect and can deviate in the following ways:
• Variations in the peak or RMS voltage are both important to different types of equipment
• The RMS voltage exceeds the nominal voltage by 10 to 80% for 0.5 cycle to 1 minute – swell
• A dip or a sag occurs when the RMS voltage is below the nominal voltage by 10 to 90% for 0.5 cycle to 1 minute
• Random or repetitive variations in the RMS voltage between 90 and 110% – flicker
• Abrupt, very brief increases in voltage – spikes, impulses, or surges
• Undervoltage occurs when the nominal voltage drops below 90% for more than 1 minute
• Overvoltage occurs when the nominal voltage rises above 110% for more than 1 minute
• Variations in the frequency
• Variations in the wave shape – usually described as harmonics
• Nonzero low-frequency impedance
• Nonzero high-frequency impedance
The Dranetz PX5 Power Quality Analyzer integrates the most advanced feature set available in a power-monitoring instrument, including an easy-to-navigate, color graphical user interface.
With high-speed sampling and data capture (1 microsecond/channel), this 8-channel workhorse simultaneously captures and characterizes thousands of parameters, using a range of standard and customizable operating modes.
The unique measurement capabilities of the Dranetz PX5 Power Quality Analyzer include capture of low-medium-high frequency transients through peak, waveshape, rms duration and adaptive high-speed sampling as well as power measurements to characterize non-sinusoidal and unbalanced systems clearly.