Power Quality Analyzer
The power quality analyzer is a core tool for power monitoring, energy consumption analysis, and fault tracing. The key to model selection lies in "accuracy matching, function coverage, and communication compatibility." Based on your procurement needs, the following are the core selection points and references for local and surrounding manufacturers:
Core Selection Parameters
During selection, the following parameters must be carefully matched to ensure measurement accuracy and system compatibility:
Accuracy Class and Standard Compliance: According to the GB/T 19862-2025 standard, accuracy is divided into three classes: Class A, Class B, and Class S:
Class A: Voltage/current measurement error ≤±0.1%, harmonic measurement complies with IEC 61000-4-30 Class A standard, suitable for high-precision scenarios such as grid gateways, renewable energy grid connection, and precision manufacturing. Measurement results have legal effect and can be used to determine responsibility for power quality.
Class B: Voltage/current measurement error ≤±0.5%, suitable for daily monitoring and trend analysis by general industrial users.
Class S: Suitable for general monitoring scenarios such as commercial buildings and ordinary industry.
Measurement Range and Function Coverage:
Basic electrical parameters: voltage (AC 0-500V or higher), current (supporting direct access or clamp-on current transformer input), active/reactive/apparent power, power factor, frequency (45-65Hz).
Power quality analysis: harmonic analysis (conventional 2nd-63rd, high-end up to 127th), three-phase unbalance, voltage fluctuation and flicker (Pst/Plt), voltage sag/swell/interruption and other transient event capture.
Sampling Rate and Transient Capture: For daily monitoring in ordinary distribution rooms, 64 points/cycle is sufficient; voltage sag monitoring requires ≥256 points/cycle (12.8kHz), capable of capturing 10ms-level events; extremely sensitive scenarios such as semiconductors require ≥2048 points/cycle to capture 1ms-level micro-sags.
Communication and System Integration:
Interface types: RS-485 (communication distance about 1200 meters), Ethernet (Modbus-TCP/HTTP), wireless (LoRa/NB-IoT/4G).
Protocol support: Modbus-RTU is mandatory; DL/T645 is required for connection to grid metering systems; CAN/Profibus is optional for industrial automation; IEC 1850 protocol must be supported for renewable energy grid connection and digital substations.
Data Storage and Transmission Capability: Built-in large-capacity memory or support for SD card/USB flash drive expansion, supporting long-term continuous recording (from several days to several months), supporting data export in CSV, PDF, Excel and other formats. The accompanying data analysis software can automatically generate test reports compliant with IEC/GB/EN50160 standards.
Environmental Adaptability and Portability: Portable designs typically weigh 1-3kg, with built-in lithium batteries that can work continuously for more than 6-10 hours; industrial sites require EMC Level IV immunity, and outdoor scenarios require IP65 protection rating, with an operating temperature of -30℃~70℃.
References for Local and Surrounding Manufacturers
Jiangsu is an important industrial belt for power testing instruments in China. Yangzhou and its surrounding areas have many professional manufacturers of power quality analyzers, making on-site inspections and after-sales support convenient:
Yangzhou Local:
Jiangsu Zhongling High-Tech Co., Ltd.: Founded in Yangzhou in 1993, a key high-tech enterprise under the National Torch Program. Its power quality product line includes four series of monitoring products: voltage sag monitors, online power quality monitoring devices, and handheld power quality analyzers. It has been successfully applied in major projects such as the Three Gorges Project, ultra-high-voltage power stations, and multiple high-speed railways, and has built a power quality online monitoring system for the entire Xinjiang region.
Yangzhou Guohao Electric Co., Ltd.: Produces the GHPQ100 power quality analyzer, which integrates power quality analysis, electrical parameter testing, and power vector analysis. It is equipped with high-precision voltage/current transformers and clamp-on current transformers, supports vector diagram display and wiring judgment, and has a built-in large-capacity data memory that does not lose data on power failure.
Yangzhou Guoheng Electric Co., Ltd.: Specializes in the research, development, and production of electrical testing equipment. Its products cover transformer testing equipment, high-voltage test equipment, power metering equipment, secondary circuit testing equipment, etc., and are widely used in power systems, scientific research and teaching, water conservancy, petroleum, railways, mining, chemical industry, and other industries.
Yangzhou Zhongrui Electric Co., Ltd.: Focuses on the research, development, and application of intelligent power monitoring and energy management products. The ZR30 series programmable multi-function meters support medium- and low-voltage electrical parameter monitoring, and the products are widely used in electric power, coal, machinery, metallurgy, petroleum, chemical industry, transportation, construction, and other fields.
Jiangsu Aister Electric Co., Ltd.: Located in Yangzhou Chengnan Industrial Park, it develops and produces AST series intelligent programmable digital display meters, multi-function network power meters, power transmitters, etc. The products have been tested by the China Electric Power Research Institute and the Jiangsu Provincial Metrology and Testing Center.
Jiangsu Feilong Electric Meter Co., Ltd.: Located in Hanjiang District, Yangzhou, it produces power meters, digital intelligent instruments, electricity meters, and other products, and has a complete quality management system.
Bainade (Yangzhou) Power System Co., Ltd.: Located in Xinji Town, Yizheng City, its business scope includes uninterruptible power supplies, stabilized power supplies, instruments and meters, power electronics software research and development, etc., and it has manufacturing capability for power transmission, distribution, and control equipment.
Surrounding Areas:
Nanjing/Wuxi Direction: Nanjing NR Electric, Nanjing Canpower Electric, Jiangsu Sfere Electric (Jiangyin), Acrel Electric (Wuxi Jiangyin production base), etc., have mature technologies in the fields of power quality monitoring and intelligent power instruments, and can provide a full range of products from portable analyzers to online monitoring systems.
Wuhan Direction: Wuhan Guodian Xigao Electric, Wuhan Chuangyi Electric, Wuhan Hainuo Paer Electric, etc., are among the domestic leaders in the technical strength of power quality testers, with products covering all scenarios of portable and online monitoring.
Other Well-Known Brands: Hongxiang Co., Ltd. (679E Pro series, 0.02 class high precision), Fluke, Hioki, Zhiyuan Electronics, Onlly Electric, etc., have advantages in high-end metrology calibration and import substitution scenarios.
Selection Precautions
First confirm whether the on-site application scenario is grid gateway metering, renewable energy grid connection, industrial energy consumption monitoring, or daily monitoring in an ordinary distribution room. Different scenarios have greatly different requirements for accuracy class (Class A/B/S).
If used for grid gateway or renewable energy grid connection, Class A equipment compliant with IEC 61000-4-30 Class A standard must be selected, and the CNAS/CMA type test report and grid connection test report provided by the manufacturer must be verified.
During procurement, it is necessary to confirm the compatibility of the communication protocol with the existing system (such as SCADA, energy management platform) to avoid difficulties in later integration; at the same time, pay attention to data storage capacity, export formats, and whether analysis software is included, to ensure that data is traceable and analyzable.
For portable instruments, attention should be paid to battery life (recommended ≥6 hours) and protection rating (outdoor IP65 and above). For online devices, attention should be paid to EMC immunity level and MTBF (recommended ≥40,000 hours).
