Power quality analysis instrumentation against EN50160. Power measurements.

When Power Quality measurements are moving out of the control rooms there is a growing need for a state-of-the-art instrument which can handle tough demands from both the technical measurements and the environment.

Unilyzer 902 is a norm-compliant (IEC 61000-4-30, Class A) and 3rd party-certified field instrument, dust- and splash-proof (IP65), with a high performance that meets these demands.

Unilyzer 902’s options for remote communication, e.g. GSM modem, also helps you save time and money, since you can download the measure data and re-configure the unit from your office, without having to go to the location where it is installed.

Main functions

• Automatic transducer identification Measurements
• Quantities and units like V, A, W, VA, VAr, kWh, kVArh, PF, Cosj, Hz, IFL, PST, PLT.
• Transients >1 ms
• Voltage sags (dips) and swells
• Flicker
• Harmonics. Odd, even, interharmonics and directions.
• Current and voltage unbalance
• Signalling voltage
• K-factor for transformers
• All power quality parameters measured simultaneously
• Direction for power harmonics and disturbance

Performance

Unilyzer 902 uses DSP (Digital Signal Processor) for measuring all periods without time gaps. Together with the built-in hardware locking to the fundamental frequency this gives the highest possible accuracy. Four independent trig channels capture sags, swells, transients and interruptions.