Technical Overview of the ZXBLQ-I Zinc Oxide Arrester Tester

1. Introduction

Zinc oxide arresters serve as critical overvoltage protection components in power transmission and distribution systems, safeguarding transformers, transmission lines and other core equipment from lightning surges and switching overvoltages. Degradation of internal insulation and aging of valve discs will progressively impair the protective performance of arresters, and may even cause thermal runaway or equipment failure in severe cases. For this reason, routine electrical performance testing is an essential procedure in power equipment condition-based maintenance.

The ZXBLQ-I Zinc Oxide Arrester Tester is a purpose-built instrument for arrester performance evaluation. It supports both live-line and de-energized detection for arresters across various voltage levels, enabling field technicians to identify latent defects such as internal insulation dampness and valve element aging at an early stage.

2. Operating Principle and Core Measurement Capabilities

The entire measurement workflow of the ZXBLQ-I tester is governed by an embedded microcomputer system, which fulfills automatic data acquisition, digital calculation and result display. It covers a comprehensive set of electrical parameters required for systematic arrester condition assessment:

Total leakage current, resistive current and their harmonic components

Power frequency reference voltage and its harmonic components

Active power consumption of the arrester

Phase difference between voltage and current signals

Fitted with a large-format display, the instrument presents real-time voltage and current waveforms directly, allowing technicians to observe signal characteristics visually and judge the operating status of the arrester intuitively.

3. Key Technical Features

3.1 Multi-scenario Compatibility

The tester adapts to three typical application scenarios: on-site live arrester testing, de-energized inspection under power outage conditions, and laboratory calibration tests. This versatility satisfies the demands of routine patrol inspection, preventive testing and fault diagnosis in power utilities.

3.2 Safety Design and Structured Data Management

With fully isolated current and voltage sensors, the instrument guarantees high operational safety and eliminates cross-interference between measurement loops. It supports grouped storage of test data for A, B and C three-phase arresters, which streamlines data management for three-phase power systems.

3.3 Human-machine Interaction and On-site Output

It is equipped with a 5.7-inch 320×240 LCD display with graphic output capability, delivering an intuitive and user-friendly operation interface. The integrated high-speed thermal printer can produce test data and voltage-current curves rapidly, facilitating on-site documentation. The instrument also supports continuous testing mode to meet the requirements of long-term monitoring or multi-point sequential measurement.

3.4 Data Storage and Upper Computer Communication

The built-in non-volatile memory preserves up to 200 groups of test data, with no data loss after power shutdown. With a reserved RS232 communication interface, the tester allows test data export to a host computer for further in-depth analysis, performance trend tracking and standardized archiving.

3.5 Anti-interference Performance and Measurement Accuracy

Featuring high-speed sampling technology and advanced digital signal processing algorithms, the instrument exhibits strong anti-electromagnetic interference capability. It maintains high measurement accuracy even under the complex electromagnetic environment of substations, ensuring reliable and credible test results.

3.6 Field-oriented Structural Design

The tester is enclosed in a dust-proof, waterproof and anti-corrosive engineering plastic sealed case. With overall dimensions of 360×260×140mm and a net weight of 5kg, it boasts compact volume and light weight, making it portable and suitable for outdoor and on-site operation.

4. Detailed Technical Specifications

Full List of Measurable Parameters

Full waveform, fundamental RMS value and peak value of total leakage current

Fundamental RMS value of resistive leakage current, plus RMS values of its 3rd, 5th and 7th harmonic components

Positive peak (Ir+) and negative peak (Ir-) of resistive leakage current

Fundamental component of capacitive current

Phase angle difference between full voltage and full current

RMS value of reference voltage

Active power consumption of the arrester

5. Engineering Value for Power Technicians

For front-line power testing and maintenance personnel, the ZXBLQ-I tester provides an efficient, reliable solution for arrester condition detection. Its live-line testing capability eliminates the need for power outage during routine inspection, minimizing the impact on power supply reliability. The precise measurement of resistive current and its harmonics can effectively reflect the aging degree of zinc oxide valve discs, which is recognized as the core indicator for evaluating arrester degradation.

Furthermore, its complete data management and export functions support the establishment of arrester condition files, helping technicians conduct equipment performance trend analysis and formulate targeted maintenance strategies, thus improving the overall operation and maintenance level of power grid assets.

GDZX is a manufacturer of power detection equipment, offering a diverse range of products with comprehensive models and providing professional technical support. Contact us at +86-27-6552607 or +86-17396104357.Website: http://en.gdzxdl.com/