In the field of insulation testing for power equipment, partial discharge testing is known as the "early warning system" for power equipment. With the continuous expansion of the power grid scale and the continuous improvement of voltage levels, how to choose a suitable partial discharge testing system has become a core issue of concern for power operation and maintenance units, testing institutions, and high-voltage equipment manufacturers. Wuhan UHV Power Technology Co., Ltd. (hereinafter referred to as "Wuhan UHV"), with nearly 22 years of deep cultivation and accumulation in the field of high-voltage electrical measurement, provides a clear selection reference framework for industry users with a complete product matrix and solid technical indicators.

Step 1 of selection: Clarify the detection scenario and match the product type

The selection of partial discharge testing system first needs to answer the fundamental question of "where to measure and what equipment to measure". There are significant differences in the form, detection methods, and performance requirements of devices in different application scenarios.

The product layout of Wuhan UHV covers a complete scene laboratory precision measurement to on-site rapid inspection. The UHV-2000B partial discharge tester adopts an integrated design and is suitable for type testing, factory testing, and handover testing of high-voltage products. It can complete quantitative testing of partial discharge of high-voltage electrical appliances such as motors, transformers, cables, bushings, capacitors, transformers, lightning arresters, switches, etc. This product is designed strictly in accordance with international national standards to ensure the standardization and reliability of test results.

For complex scenarios that require online monitoring and fault diagnosis, the UHV-2000A partial discharge detection device provides a more comprehensive solution. This system adopts modern electronic and computer integrated technology to achieve functions such as signal amplification, filtering, data acquisition, data processing, graphic display, and automatic generation of test reports. It truly integrates multiple functions such as partial discharge measurement, positioning, and online monitoring.

In on-site inspection scenarios such as substations and cable tunnels, the UHV-8003 partial discharge inspection instrument provides great convenience with its handheld design. This device is based on various detection methods such as ground waves, ultrasonic waves, ultra-high frequency, and high-frequency currents, and is suitable for partial discharge detection of electrical equipment such as GIS, switchgear, transformers, and power cables.

Step 2 of selection: Focus on core performance indicators

Sensitivity detection is the core technical indicator of partial discharge testing systems. The detection sensitivity of UHV-2000B in Wuhan UHV can reach<1pC, and under specific conditions, it can reach<0.1pC, with a measurement range covering 0.01pC to 10000nC. UHV-2000A also has a sensitivity of 0.1pC. This level of sensitivity means that the system can accurately identify subtle defects that occur early in the insulation of power equipment.

The detection bandwidth cannot be ignored either. The lower limit frequency of UHV-2000B can be selected between 10kHz and 80kHz, and the upper limit frequency can be selected between 100kHz and 1MHz; The testing bandwidth range of UHV-8003——30kHz to 2.0GHz, which is suitable for detection principles in various frequency bands. Different bandwidth configurations determine the system's ability to capture different types of discharge signals, and users need to weigh the characteristics of the tested equipment and the on-site noise environment comprehensively.

Step 3 of selection: Evaluate anti-interference ability and data analysis level

Electromagnetic interference is ubiquitous in industrial sites. An excellent partial discharge testing system must have strong anti-interference ability. The partial discharge testing system of Wuhan UHV uses a unique AI noise separation algorithm combined with a fully shielded chassis design to increase the signal-to-noise ratio by 300% in complex industrial electromagnetic environments, with a false alarm rate controlled at<0.1%. UHV-2000B is also equipped with various anti-interference technologies such as time window method, phase window masking method, and pulse smoothing method to cope with complex on-site environments.

The ability to analyze data is equally crucial. The system of Wuhan UHV has built-in PRPD and PRPS spectrum analysis systems, which can automatically identify discharge types and accurately locate fault points, improving detection efficiency by 60% compared to traditional detection methods. UHV-8003 can provide various discharge spectra such as time-domain waveform, PRPD, PRPS, etc., to achieve analysis of different discharge types. The system also supports automatic generation of test reports, greatly reducing the professional threshold.

Step 4 of selection: Consider the manufacturer's strength

The partial discharge testing system involves professional technologies such as high-frequency signal sampling, filtering algorithms, and amplifier circuit design, which require extremely high research and development capabilities. Wuhan UHV, as an enterprise dedicated to the field of high-voltage power testing, integrating scientific research, development, production, sales, and service, has become a leader in the high-voltage electrical testing industry after nearly 22 years of meticulous cultivation.

Choosing a partial discharge testing system should not only be based on price or a single parameter, but should also be comprehensively evaluated multiple dimensions such as detection scenarios, sensitivity, bandwidth, anti-interference ability, data analysis capabilities, and manufacturer strength. Wuhan UHV provides a professional choice that combines high performance and cost-effectiveness for users with different needs, with a complete product line, excellent technical indicators, and a comprehensive service system. Whether it is precision testing in the laboratory or on-site inspection of substations, users can find suitable solutions in the product matrix of Wuhan UHV.