Power Quality Analysis
Voltage, loads and harmonics in a network change over time. To detect a problem in a network it is necessary to be able to monitor these changes in a reliable way. To do this we use various pieces of equipment including Unilyzers, VIP & Fluke meters.
Unipower 812 Unilyzer
The Unipower 812 Unilyzer has eight channels with transducers for measuring voltage and current .The system calculates true root mean square values for voltage and current and it also calculate the active and reactive power, apparent power and power factor. During measurement, an oscilloscope picture of the signal for waveform Analysis is displayed. Harmonics can also be measured and displayed in bar diagram or table format.
The Instrument software carries out analysis of the measured data against international standards such as EN50160.
The Unilyzer measurers and records the following: -
With our disturbance analysis equipment it is possible to capture transients, short dropouts (outages), sags, surges and deviating voltage levels etc. For example, by selecting a nominal voltage level and maximum deviation allowed, the equipment then monitors the waveforms of the three phases. When a disturbance occurs the equipment immediately captures, stores and displays the disturbed waveform. When used in the oscilloscope mode, this allows the simultaneous viewing of the waveforms of voltages and currents etc. In the phasor diagram we can study the phase relationship between each phase of voltage or current. This can be extremely useful in checking the operation of directional relays, impedance relays etc.
The Unipower 812 Unilyzer has eight channels with transducers for measuring voltage and current .The system calculates true root mean square values for voltage and current and it also calculate the active and reactive power, apparent power and power factor. During measurement, an oscilloscope picture of the signal for waveform Analysis is displayed. Harmonics can also be measured and displayed in bar diagram or table format.
The Instrument software carries out analysis of the measured data against international standards such as EN50160.
The Unilyzer measurers and records the following: -
- Load analysis, V, A, W, VA, Var., kWh, kVArh, PF, cos (phi), IFL, PST and PLT measurements.
- Disturbance analysis (transients, drop-outs etc.).
- Harmonic analysis, IEC 1000-4-7.
- Flicker analysis, IEC 868.
- Unbalance measurements.
- Voltage quality monitoring.
- Start sequences / in-rush current studies.
- General purpose measurements (4-20 mA transducers).
With our disturbance analysis equipment it is possible to capture transients, short dropouts (outages), sags, surges and deviating voltage levels etc. For example, by selecting a nominal voltage level and maximum deviation allowed, the equipment then monitors the waveforms of the three phases. When a disturbance occurs the equipment immediately captures, stores and displays the disturbed waveform. When used in the oscilloscope mode, this allows the simultaneous viewing of the waveforms of voltages and currents etc. In the phasor diagram we can study the phase relationship between each phase of voltage or current. This can be extremely useful in checking the operation of directional relays, impedance relays etc.
Fluke 99 Scope Meter & Fluke 41B Harmonic Analyser
The Unilyzer and VIP Energy Analyser is complemented with the use of a Flukescope Digital 50MHz Storage Oscilloscope, and Fluke 41B which can be used to carry out in-dept investigation to Power Quality Problems.
The Unilyzer and VIP Energy Analyser is complemented with the use of a Flukescope Digital 50MHz Storage Oscilloscope, and Fluke 41B which can be used to carry out in-dept investigation to Power Quality Problems.
Unipower 902 Unilyzer
The Unilyzer 902 measurers :-
Disturbances:
Four independent channels capturing sags, swells, event capturing, fast transients (1us), interruptions, frequency & deviations simultaneously.Two software programs for evaluation of measured data are used – PowerProfile and Unipower Report. Power-Profile gives all information about the measured parameters in graphical form. Unipower Report evaluates a measurement according to recognized standards such as the EN 50 160 and automatically produce a report. Another possibility to evaluate measure data is to import the data to a standard spreadsheet such as Microsoft Excel etc.
The Unilyzer 902 measurers :-
- RMS Voltage,
- RMS current,
- Power (kW, kVAr,kVA),
- Energy (kWh, kWhr),
- PF,
- COSfi,
- Harmonics (IEC 1000-4-7),
- THD, flicker (IEC 1000-4-15),
- Frequency,
- Unbalance.
Disturbances:
Four independent channels capturing sags, swells, event capturing, fast transients (1us), interruptions, frequency & deviations simultaneously.Two software programs for evaluation of measured data are used – PowerProfile and Unipower Report. Power-Profile gives all information about the measured parameters in graphical form. Unipower Report evaluates a measurement according to recognized standards such as the EN 50 160 and automatically produce a report. Another possibility to evaluate measure data is to import the data to a standard spreadsheet such as Microsoft Excel etc.