High-Precision Portable Power Quality Analyzer

The MOEORW-WNQ66 power quality analyzer is a portable industrial measuring terminal independently developed with PICOLINUX embedded system, designed for comprehensive grid power quality monitoring, recording, transient waveform capture and data analysis. The device is equipped with 4 voltage and 4 current independent sampling channels, supporting multi-system wiring modes for single-phase, two-phase and three-phase power grids. It integrates real-time data display, steady-state event recording, transient wave recording, multi-network communication and local data storage functions, fully meeting field inspection, grid acceptance, equipment failure diagnosis and long-term unattended monitoring demands of power distribution, industrial manufacturing and new energy stations.

The unit adopts an 8-inch industrial touch display with built-in 8000mAh rechargeable lithium battery, supporting up to 6 hours of continuous offline operation. Multiple communication interfaces including Ethernet, Wi-Fi, 4G, RS232 and USB OTG are reserved for remote data transmission and device interconnection. All measurement performance meets Class A harmonic testing standards, with complete EMC anti-interference compliance for harsh on-site electromagnetic environments.

General Mechanical & Display Parameters

Power Supply Parameters

Storage & Communication Interfaces

Environmental & EMC Performance

Input Channel & Measurement Basic Parameters

Measurement Range & Accuracy

Hardware Design & Hardware Configuration
1.Multi-channel synchronous sampling architecture with 4 voltage and 4 current independent input channels, compatible with full range of external current clamps with voltage output signals.
2.8-inch high-brightness industrial touch screen with adjustable backlight, supporting screenshot, one-click screen lock and brightness cycle adjustment via physical shortcut keys.
3.Multi-mode power supply solution combining external 12V adapter and built-in large-capacity lithium battery, supporting long-duration field measurement without mains power access.
4.Rich multi-type communication interfaces including Ethernet, Wi-Fi, 4G, RS232 and USB OTG, realizing wired/wireless remote data transmission and host computer linkage.
5.Standard SD card mass storage design, supporting up to 64GB expandable storage for long-term data logging, waveform recording and screenshot file storage.
6.Dual status indicator lamps (power & recording) to intuitively display battery charging state and SD card data read-write activity.
 

Measurement Performance Advantages
1.Full Class A harmonic measurement performance, supporting DC component and 1~63 order harmonic voltage, current and harmonic power analysis.
2.High-precision flicker measurement module, simultaneously calculating short-term flicker Pst (10min) and long-term flicker Plt (2h) to meet grid fluctuation assessment requirements.
3.Complete three-phase unbalance analysis function, calculating positive/negative/zero sequence voltage & current components and corresponding unbalance degrees.
4.Built-in transient event capture algorithm, automatically recording voltage swell, voltage dip, short interruption and impulse current events with front/rear waveform cycles configurable.
5.High-precision power and energy statistics, separately calculating phase & total active/reactive/apparent energy and four-quadrant reactive energy accumulation.
6.Ultra-wide frequency measurement range covering 45–65Hz, applicable to conventional power grids and variable frequency power supply systems.
 

Practical On-site Application Value
1.Multi-type data visualization display including data tables, real-time trend curves, harmonic bar charts, oscilloscope waveforms and phasor vector diagrams for intuitive fault judgment.
2.Two independent recording modules: Recorder for steady-state parameter timing logging, Wave Recorder for raw voltage/current waveform continuous capture up to 10 minutes, both supporting unattended scheduled recording tasks (max 6 scheduled tasks).
3.Customizable steady-state and transient alarm thresholds complying with GB/T 14549, GB/T 12325 national standards, automatic snapshot storage of abnormal event data for post-fault tracing.
4.Independent parameter configuration module, supporting PT/CT ratio setting, wiring topology switching, current clamp model matching and measurement point information recording; config files can be imported/exported for rapid scene switching.
5.System self-management functions including network configuration, SD card file management, system time synchronization (manual/NTP/GPS), multi-language switching, screen lock password setting and system upgrade.
6.Offline operation capability without PC connection; all measurement data stored locally on SD card, files can be exported via USB or remotely transmitted via network to Picoviewer host software for secondary analysis.

1.Power Grid Operation & Maintenance: Distribution station power quality inspection, grid voltage fluctuation, harmonic and three-phase unbalance monitoring.
2.Industrial Manufacturing Plant: Non-linear load (frequency converter, welding equipment, switching power supply) power pollution testing, transformer overheating risk assessment.
3.New Energy Power Station: Photovoltaic, wind power grid-connection power quality acceptance, transient voltage disturbance monitoring during grid-connected switching.
4.Commercial Complex & Data Center: Power supply stability testing, flicker and power factor optimization inspection.
5.Electrical Equipment Factory: Generator, transformer, high/low voltage switchgear factory power quality type test.
6.Construction & Transportation: Subway, port, large construction site temporary power supply real-time monitoring and long-term data recording.

Power Quality Measurement Standards
1.GB/T 14549-1993: Quality of Electric Energy Supply – Harmonics in Public Supply Network
2.GB/T 12325: Power Quality – Deviation of Supply Voltage
 

EMC Immunity Standards (GB/T 17626 Series)
1.GB/T 17626.2 Electrostatic Discharge Immunity Test (Level 4)
2.GB/T 17626.3 Radiated Radio Frequency Electromagnetic Field Immunity Test (Level 3)
3.GB/T 17626.4 Electrical Fast Transient Burst Immunity Test (Level 4)
4.GB/T 17626.5 Surge Immunity Test (Level 4)
5.GB/T 17626.8 Power Frequency Magnetic Field Immunity Test (Level 4)
6.GB/T 17626.9 Pulsed Magnetic Field Immunity Test (Level 5)
7.GB/T 17626.12 Oscillatory Wave Immunity Test (Level 3)
 

Environmental Reliability Test Standards (GB/T 2423 Series)
Low temperature, high temperature, alternating damp heat, shock, vibration, temperature change test standards

Host Terminal Interface Layout
1.Top side: 4 current measurement channels
2.Side panel: 4 voltage measurement channels, ground terminal, RS232, Ethernet, power input, USB OTG, SD card slot, SIM card slot, indicator lamps
3.Front panel: 8-inch touch screen, physical shortcut keys (power, screenshot, screen lock, brightness adjustment)

Standard Accessories (Not Listed in Manual, Omitted)
No official standard accessory list provided in the operation manual; matching current clamps, test leads and power adapter shall be selected according to on-site measurement requirements.

Daily Operation Safety Rules
1.Read the full operation manual before deployment; avoid operation alone in live measurement environments.
2.Prohibit use near flammable and explosive gas mixtures.
3.Inspect insulation integrity of host, test leads and current clamps before each measurement; replace damaged accessories immediately.
4.Do not input voltage/current signals exceeding the rated range of the analyzer, probes or current clamps.
5.Disconnect power of the tested equipment or wear protective clothing during installation and removal of test clamps.
6.Ground terminal is only used for equipment grounding; no external voltage shall be applied to the ground port.
7.Avoid inserting metal foreign objects into BNC or banana plug ports.

Storage Maintenance Requirements
1.Clean the equipment surface with dry soft cloth only; corrosive solvents, alcohol and cleaning agents are forbidden to prevent surface text and coating damage.
2.For long-term storage, fully charge the built-in lithium battery before storage; supplementary charging at least once every 12 months to maintain battery performance.
3.Stop measurement and charge immediately when low battery warning pops up; frequent shallow charging shall be avoided, charge only when low power reminder is triggered.
4.Store within specified temperature and humidity range, avoid direct sunlight and heavy damp environment.

Data Storage Maintenance
1.Do not extract SD card during recorder or wave recorder operation to prevent data loss and abnormal system operation.
2.SD card formatting must be completed via the built-in formatting function of the analyzer; PC formatting is prohibited.
3.When SD card remaining capacity ≤1.6GB, the system will display low storage reminder; new recording/wave recording tasks cannot be created when remaining capacity <640MB, and running tasks will be forced to terminate automatically at 640MB residual space.
4.All recorded data, screenshots and configuration files are stored on SD card; the manufacturer takes no responsibility for data loss caused by SD card damage.