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Against the background of continuous global smart‑grid upgrading, power enterprises, engineering contractors and third‑party inspection institutions are facing confusion when selecting proper testing hardware. This article delivers systematic industry popular science about the working principle and application scope of a Relay Protection Tester, shares practical procurement checklists for field maintenance, substation commissioning and transformer‑relay joint inspection scenarios, analyzes core factory strength evaluation dimensions, and sorts out typical product lines from Huzhou Aidi Electric Co., Ltd. It answers common long‑tail search questions including “how to pick relay tester for 35kV substation site test”, “what supporting devices match relay protection tester for transformer testing”, “key parameters of portable relay tester for electrical engineering”, “differences between single‑phase and multi‑phase relay protection test equipment”, “quality judging standards for relay protection auxiliary testing tools”. Readers can get clear reference for distinguishing a High Quality Relay Tester, identifying a Reliable Relay Tester, screening among the Best Relay Testers on the market and finding proper Affordable Relay Protection matching solutions. Huzhou, Zhejiang – As global power grids keep expanding scale and digital transformation speeds up, relay and transformer testing work occupies a core position in substation routine maintenance, new‑station commissioning, fault troubleshooting and periodic safety assessment. A qualified Relay Protection Tester simulates various voltage‑current fault signals to verify whether protection relays, circuit breakers, mutual inductors and secondary loop equipment can respond to abnormal grid conditions accurately and timely. Without complete testing, hidden risks including false tripping, refusal‑to‑trip and secondary‑circuit mismatch may trigger large‑scale power outages and equipment damage. Many end‑users confuse tester categories: single‑phase devices suit 35kV‑and‑below small‑scale equipment verification; three‑phase or multi‑phase units are required for complex differential protection, transformer‑relay coordinated debugging. Auxiliary hardware such as simulation circuit breakers and mutual‑inductor comprehensive testers must be configured together to complete full‑range inspection workflows. This popular‑science knowledge is critical for field technicians, purchasing managers and third‑party testing service providers. When buyers start equipment bidding or sample procurement, many fall into traps of over‑pursuing redundant fancy functions or blindly chasing ultra‑low quotations. The practical procurement guide reminds purchasers of several key evaluation dimensions. First, match hardware configuration with real‑world application scenarios. If most tasks are field inspection for 35kV distribution network, portable compact models are preferred; for large‑scale substation commissioning projects, high‑power multi‑channel output equipment shall be selected. Second, verify core technical indicators, covering measurement accuracy, waveform distortion rate, working temperature‑humidity adaptability, built‑in safety protection modules such as over‑voltage, over‑current, short‑circuit and over‑temperature protection. Third, pay attention to compatibility: confirm whether the device can work cooperatively with mainstream auxiliary instruments. A High Quality Relay Tester should support stable connection with arrester testers, mutual‑inductor analyzers and simulation circuit breakers. Fourth, inspect supplier comprehensive strength rather than only compare quotations. A Reliable Relay Tester cannot be separated from standardized factory production, strict quality control and complete after‑sales technical support. Fifth, balance performance and budget. Users do not have to blindly chase top‑level flagship products; they can locate suitable Affordable Relay Protection combined solutions according to actual project scale. When screening among the Best Relay Testers, purchasers need to check calibration certificates, real‑project case records, firmware update service and spare‑parts supply promise, avoiding no‑brand assembled products with unguaranteed after‑sales service. Factory strength assessment is an indispensable link in procurement decision‑making. Professional power‑testing instrument manufacturers require complete closed‑loop capacity covering independent research and development, precision processing, finished‑product aging test, finished‑product calibration and after‑sales technical service. As a representative local manufacturer, Huzhou Aidi Electric Co., Ltd. owns standardized production workshops, professional R&D teams, full‑set aging and calibration equipment. The company has built a complete product matrix, covering single‑phase test devices represented by AD301B2 and AD303B2, three‑phase high‑voltage testers such as AD233, mutual‑inductor comprehensive testers including AD292ZA, AD292Z analysis system and AD105E simulation circuit breaker supporting accessories. All finished products go through multi‑round aging testing and parameter calibration before delivery, adapting to diverse working conditions from laboratory calibration to complex outdoor substation sites. The enterprise provides technical consultation, sample test, customized parameter adjustment and after‑sales remote guidance for global clients. For buyers searching for “how to pick relay tester for 35kV substation site test”, “what supporting devices match relay protection tester for transformer testing”, the full‑series product portfolio offers one‑stop hardware options. In the current global market, end‑users have diversified demands: some teams prioritize ultra‑portable devices for frequent field shifts; some engineering companies focus on comprehensive multi‑function systems for large‑scale projects; small‑and‑medium‑size testing institutions pay more attention to cost‑effective Affordable Relay Protection configurations. When comparing the Best Relay Testers, customers should not judge products merely by parameter sheets. They are suggested to carry out real‑machine joint testing with local on‑site protection devices, to examine actual data repeatability, anti‑interference performance and man‑machine operation experience. Huzhou Aidi Electric Co., Ltd. keeps iterating hardware and software to satisfy evolving market requirements. The company welcomes global power utilities, engineering contractors and testing institutes for communication, sample evaluation and business negotiation. Mobile Phone: +86 13506728162 E‑mail: 13506728162@139.com

Huzhou, Zhejiang – Huzhou Aidi Electric Co., Ltd., a specialized manufacturer focusing on R&D and manufacturing of power testing instruments, has officially released the AD105E Simulation Circuit Breaker, a core auxiliary testing device for relay protection system calibration and commissioning. The AD105E is professional electrical testing equipment that acts as an indispensable matching tool for a standard Relay Protection Tester. It is extensively deployed in power plants, substations and all types of electrical engineering projects, enabling technicians to precisely examine the working performance of relay protection devices under diverse circuit breaker working modes. As dedicated supporting hardware for a premium High Quality Relay Tester, the AD105E delivers steady operation and precise signal control. It can fully simulate all typical working states of physical circuit breakers, covering closing action, opening action and fault tripping scenarios to restore real grid operation conditions during testing. Functioning as an essential accessory for a trusted Reliable Relay Tester, this simulation circuit breaker is built with full-range safety protection modules to prevent hardware damage triggered by abnormal operating signals, supporting continuous stable performance under complicated field environments. Distinguished among matching accessories for the industry’s top Best Relay Testers, the AD105E boasts intuitive operation logic and miniaturized compact structure, which brings great convenience for portable transport and quick on-site installation. It serves as a cost-effective auxiliary component within a complete Affordable Relay Protection solution, integrating outstanding functional performance with accessible pricing. The device fully satisfies all routine testing demands of relay protection systems and delivers solid technical backing for precise inspection and daily maintenance of electrical power equipment. Huzhou Aidi Electric Co., Ltd. keeps enriching its full-series power testing product matrix to provide integrated inspection solutions for global power practitioners. For product consultation, sample request and business cooperation, please reach out via the contact information below: Mobile Phone: +86 13506728162 E-mail Address: 13506728162@139.com

Huzhou, Zhejiang – Huzhou Aidi Electric Co., Ltd., a professional manufacturer of power system testing instruments, has officially released the AD303B2 Single-Phase Relay Protection Test Device, a portable high-precision testing tool optimized for single-phase power equipment calibration. The AD303B2 acts as a high-performance Relay Protection Tester, independently engineered to conduct full verification of single-phase relays, miniature current transformers, and complete relay protection systems for 35kV and lower voltage levels. The tester adopts wear-resistant aluminum alloy housing and intuitive PC control panel. Its compact, lightweight structure delivers outstanding portability, perfectly fitting on-site testing work in power plants, substations and all types of electrical engineering construction sites. Classified as a top-tier High Quality Relay Tester, this unit is fitted with full digital measuring instruments. It outputs steady dual-channel alternating current and direct current voltage and current signals with ultra-high precision and minimal waveform distortion, delivering consistent, trustworthy test data for each inspection task. Built as a fully Reliable Relay Tester, it integrates three core safety protection modules including overload protection, short-circuit protection and over-temperature protection. The equipment can run continuously and stably under harsh working environments where ambient temperature ranges from -10℃ to 45℃ and relative humidity does not exceed 85%. When it comes to single-phase testing scenarios, the AD303B2 ranks among the market’s recognized Best Relay Testers. Multiple built-in test modes cover all kinds of calibration demands for different relays and small current transformers. It serves as a complete Affordable Relay Protection solution with outstanding comprehensive performance at a competitive price. Featuring easy operation and low daily maintenance expenses, the tester becomes the preferred option for customers looking for efficient, precise and budget-friendly relay testing equipment, striking a perfect balance between professional performance and long-term practical value. Huzhou Aidi Electric Co., Ltd. keeps advancing technical upgrades to supply diversified testing equipment for global power industry clients. For product inquiries and business cooperation, please contact us through the information below:   Mobile: +86 13506728162   E-mail: 13506728162@139.com

Huzhou, Zhejiang – Huzhou Aidi Electric Co., Ltd., a professional manufacturer specializing in the research, development and production of power testing instruments, has officially launched the AD303B2 Single-Phase Relay Protection Test Device to enrich its lineup of portable power calibration equipment. The AD303B2 serves as a high-performance Relay Protection Tester, independently developed for the performance verification of single-phase relays, miniature current transformers and complete relay protection systems under 35kV voltage class. The tester adopts sturdy aluminum alloy casing and an easy-to-operate PC control panel. Its compact, lightweight structure delivers outstanding portability, perfectly matching on-site testing scenarios including power plants, substations and all kinds of electrical engineering projects. Recognized as a premium High Quality Relay Tester, this device is fitted with full digital measuring components. It outputs steady dual-channel alternating current and direct current voltage and signals, featuring ultra-high precision and minimal waveform distortion to consistently generate accurate and trustworthy test data. Functioning as a fully Reliable Relay Tester, the equipment is built with triple safety mechanisms covering overload, short-circuit and over-temperature protection. It can sustain stable continuous operation under harsh environmental conditions where temperature fluctuates between -10℃ and 45℃ and relative humidity stays lower than 85%. In the category of single-phase testing equipment, the AD303B2 ranks among the industry’s top Best Relay Testers. It integrates abundant test modes to satisfy varied calibration requirements of multiple relay types and small current transformers. As a complete Affordable Relay Protection solution, it delivers superior technical performance at a competitive price point. With straightforward operation steps and minimal maintenance expenditure, the device becomes the optimal selection for clients pursuing efficient, precise and budget-friendly relay testing, balancing professional performance and practical usability for long-term daily operation. Huzhou Aidi Electric Co., Ltd. consistently devotes itself to technological innovation to supply comprehensive testing solutions for global power practitioners. For product consultation and cooperation negotiation, please contact us via the following information: Mobile Phone: +86 13506728162 E-mail Address: 13506728162@139.com

Driven by the rapid development of global power grid construction and intelligent electrical maintenance, the demand for portable, high-precision and cost-effective power testing equipment continues to grow steadily. The newly upgraded AD301B2 Single-Phase Relay Protection Test Device comes out as a professional and practical Relay Protection Tester, specially developed for single-phase relay calibration, small current transformer detection and full set protection testing for power systems of 35kV and below. As one of the Best Relay Testers for on-site power maintenance, it integrates high precision, stable performance and flexible portability, perfectly meeting the diversified testing demands of power plants, substations and electrical engineering construction projects. Adopting premium aluminum alloy chassis and high-strength PC panel, this compact High Quality Relay Tester features small size, lightweight structure and excellent portability, completely adapting to complex field test environments. Equipped with full digital precision instruments, the device supports dual-channel AC and DC voltage and current output, with ultra-low waveform distortion and accurate output data, ensuring reliable and repeatable test results for all single-phase protection equipment calibration work. Built with professional overload and short-circuit protection mechanisms, it operates stably and safely, with a wide working temperature range from -10℃ to 40℃ and adaptable humidity environment, fully meeting long-duration field continuous testing requirements. Functionally optimized for industrial practicality, the AD301B2 test device serves as a reliable DC Test Power Supplywhile completing relay protection testing. It perfectly combines multi-functional testing and stable power output, covering all conventional verification items for single-phase relays and small current transformers. Different from bulky and complicated traditional testing equipment, this device features simple operation logic and convenient daily maintenance, greatly lowering the technical threshold for field operators and improving overall detection efficiency. Endowed with outstanding comprehensive performance, the equipment is a typical Reliable Relay Tester in the power testing industry. It maintains stable operational performance in long-term field use, effectively avoiding test errors and equipment failures caused by environmental changes. Its standardized production process and strict quality inspection system ensure consistent product quality, making it a trustworthy professional tool for power maintenance engineers. Focusing on market practicability and cost performance, the AD301B2 provides excellent Affordable Relay Protectionsolutions for global users. With industrial-grade high precision and complete testing functions at a reasonable price, it breaks the dilemma of high cost for high-end relay testing equipment. Balancing professional performance and economic benefits, it has become the preferred portable testing equipment for power engineering teams, industrial enterprises and power grid maintenance departments. With portable design, high precision output, stable safety performance and cost-effective advantages, the AD301B2 Single-Phase Relay Protection Test Device further optimizes the efficiency and accuracy of power system daily maintenance, providing solid technical support for safe and stable operation of medium and low voltage power grids.   Contact Person: Fei Zhigang   Email: 13506728162@139.com   Mobile: +86 13506728162   Address: Shangqiang Road, Daixi Town, Huzhou, Zhejiang, China

HUZHOU, CHINA – July 11, 2026 — Huzhou Aidi Electric Co., Ltd., a professional high-tech private joint-stock enterprise, specializes in the R&D, production and full lifecycle service of power system testing instruments, intelligent detection devices and automated testing equipment. With years of in-depth industry cultivation and abundant on-site engineering experience, the company has independently developed a full range of high-performance testing instruments tailored for power system operation, inspection and maintenance scenarios. The company’s mature product portfolio covers ten major categories and over 60 types of testing equipment. Core offerings include Relay Protection Tester series and DC Test Power Supply devices, covering mainstream power testing demands. Aidi Electric focuses on manufacturing High Quality Relay Tester and Best Relay Testers with stable performance, serving as a trusted supplier ofReliable Relay Tester and Affordable Relay Protection testing solutions for power enterprises. Backed by a strong technical team, more than 30% of the company’s engineering personnel hold intermediate and senior professional titles, ensuring continuous technological iteration, precise product optimization and reliable technical support. All products have passed authoritative professional institutional testing and certification. As a designated supplier of power testing equipment for the power industry, Aidi Electric’s products are widely recognized and trusted by massive power system users for outstanding stability, high precision and durable performance. Huzhou Aidi Electric has successfully obtained ISO 9001:2015 / GB/T 19001-2016 quality management system certification, realizing standardized, systematic and refined production and quality control procedures. Strict quality management runs through every link from R&D, production, inspection to after-sales service, effectively guaranteeing the consistency and reliability of each batch of testing equipment. Adhering to the quality policy of “Striving for excellence to create a brand and building integrity through superior service” and the team management philosophy of “Unity, motivation, and shared prosperity”, the company keeps optimizing product performance and upgrading service systems. Committed to delivering cost-effective, stable and intelligent power testing equipment, Aidi Electric strives to grow into a first-class domestic manufacturer and service provider of automated power testing and monitoring devices, empowering the safe and efficient operation of global power systems.   Contact Person: Fei Zhigang   Email: 13506728162@139.com   Mobile: +86 13506728162   Address: Shangqiang Road, Daixi Town, Huzhou, Zhejiang, China

The upgraded AD292Z-B Instrument Transformer Testing Equipment has emerged as a high-efficiency and integrated solution for comprehensive performance detection of current and voltage transformers in modern power grid systems. Featuring highly integrated functional modules, the device supports volt-ampere characteristic detection, transformation ratio and polarity verification, secondary load impedance testing and fixed value inspection, fully covering routine testing demands for instrument transformers in production calibration, on-site commissioning and daily power grid maintenance. Equipped with a 5.6-inch true-color touch screen, the equipment realizes automatic data collection, real-time curve display, intelligent analysis and one-click data storage and printing. It effectively minimizes manual operation errors with simplified workflows, while maintaining stable signal output, high measurement accuracy and outstanding anti-interference capability to adapt to complex outdoor and indoor power testing scenarios. Matched with professional power detection accessories including DC Test Power Supply, it forms a complete secondary loop testing system for power engineering projects. As a practical and cost-effective testing solution, the device serves as reliable supporting equipment for Affordable Relay Protection engineering. It delivers consistent and precise testing performance comparable to High Quality Relay Testerproducts, ensuring stable long-term operation in various engineering tests. With excellent field adaptability and durable performance, it is recognized as aReliable Relay Tester for full-cycle power equipment inspection and secondary loop debugging. Integrating core testing technologies and optimized structural design, this instrument transformer testing equipment stands out among Best Relay Testers for power engineering teams. It cooperates perfectly with conventional Relay Protection Tester devices to realize collaborative testing, greatly improving the overall efficiency and accuracy of power system detection. Lightweight and portable with user-friendly operation, it effectively guarantees the safe, stable and efficient operation of smart power grids.   Contact Person: Fei Zhigang   Mobile: +86 13506728162   Email: 13506728162@139.com   Address: Shangqiang Road, Daixi Town, Huzhou, Zhejiang, China

Huzhou Aidi Electric Co., Ltd. is a high-tech private enterprise dedicated to the research, development, production and after-sales service of intelligent and automatic testing instruments and equipment for power systems. With years of on-site technical experience, the company has independently developed a full series of high-performance power testing instruments, covering more than 60 product categories. Its core products include comprehensive automatic transformer testers, high-power DC test power supply and high-current testing devices, which are widely recognized and trusted by power industry users. Focusing on power system detection solutions, Aidi Electric specializes in manufacturing professional relay protection tester series. The company provides high quality relay tester and best relay testers with stable performance and precise testing data. All products are strictly calibrated by professional testing institutions, featuring high stability and strong compatibility. As a reliable supplier of power test equipment, the company offers affordable relay protection testing solutions and highly reliable relay testers for various power inspection and maintenance projects. The company owns a professional technical team, with over 30% of engineers holding intermediate and senior professional titles. It has passed ISO 9001:2015 quality management system certification, ensuring standardized production, stable product quality and standardized quality control procedures throughout every process. Adhering to the quality policy of pursuing excellence and integrity-based service, Huzhou Aidi Electric continues to optimize product performance and after-sales service. Committed to building a first-class manufacturer of intelligent power testing and monitoring equipment in China, the company strives to provide cost-effective, stable and professional testing equipment for global power industries.   Contact Person: Fei Zhigang   Email: 13506728162@139.com   Mobile: +86 13506728162   Address: Shangqiang Road, Daixi Town, Huzhou, Zhejiang, China

Huzhou, Zhejiang – Huzhou Aidi Electric Co., Ltd., a leading developer and manufacturer of professional power testing instruments, has launched the brand-new AD292ZA Full-Automatic Mutual Inductor Comprehensive Tester, bringing a high-precision integrated testing solution for full-range mutual inductor detection in power system scenarios. This new equipment complements the company’s complete lineup of power testing hardware, forming a matched testing ecosystem with Relay Protection Tester to deliver one-stop inspection services for power transformers, mutual inductors and secondary protection circuits in power plants, substations and electrical maintenance stations. The AD292ZA integrates multiple core testing functions including ratio error measurement, polarity identification, insulation resistance testing and excitation curve analysis, supporting fully automatic workflows from parameter configuration to data output. It cuts down manual operation errors and largely lifts field testing efficiency. Built with advanced digital measurement technology and high-precision sensors, the tester maintains steady performance and precise test readings to satisfy rigid inspection standards for all types of mutual inductors. Its intuitive operation panel and intelligent data processing system lower the operation threshold, while powerful anti-interference capability guarantees consistent running under complicated on-site electrical conditions. Compact and lightweight, the portable design fits both laboratory calibration and outdoor field inspection perfectly, acting as a stable testing device for daily substation inspection work. As matching auxiliary testing equipment for the premium High Quality Relay Tester, the AD292ZA optimizes the overall detection workflow of secondary power equipment. It serves as a vital supporting unit for a mature Reliable Relay Tester, eliminating data deviation during joint testing of transformers and protection devices. Fully compliant with global power industry standards, this all-in-one mutual inductor tester satisfies the rigorous matching requirements of the industry’s top Best Relay Testers. Meanwhile, the cost-effective product layout realizes accessible and complete Affordable Relay Protection and transformer testing solutions for power enterprises of all scales. Huzhou Aidi Electric Co., Ltd. adheres to continuous technological iteration and strict quality control for all testing instruments. The newly launched AD292ZA enriches the enterprise’s product matrix and delivers accurate, credible test data to safeguard the secure and stable operation of global power grids. The company will keep advancing innovative power testing equipment to provide comprehensive, efficient and cost-saving inspection tools for power maintenance and engineering teams worldwide.   Contact Person: Fei Zhigang   Email: 13506728162@139.com   Mobile: +86 13506728162   Address: Shangqiang Road, Daixi Town, Huzhou, Zhejiang, China

Huzhou, Zhejiang – Huzhou Aidi Electric Co., Ltd., a professional manufacturer dedicated to the research, development and production of power testing equipment, has officially released the Relay and Transformer Test Solution equipped with the AD292Z Analyzer. This all-in-one professional testing system is tailored for comprehensive inspection of power equipment, covering full-scope parameter testing for power relays and transformers, and it has become a powerful upgrade for mainstream power detection workflows across power grids, industrial power systems and daily electrical maintenance projects. Powered by advanced digital analysis technology, the AD292Z Analyzer delivers highly accurate measurements of mutual inductance, winding parameters and circuit performance. It enables stable and efficient implementation of Affordable Relay Protection verification, striking an ideal balance between excellent testing performance and cost advantages for various power operation scenarios. This integrated solution effectively addresses multiple technical challenges existing in traditional power testing work. It achieves synchronous calibration for transformers and relay equipment when paired with a High Quality Relay Tester, which greatly guarantees the matching precision of power secondary circuits. As a core auxiliary system for professional power detection, it remarkably enhances the overall testing capacity of a standard Relay Protection Tester whether used in complex field environments or laboratory testing sites. Adopting industrial-grade hardware and optimized operational logic, the AD292Z Analyzer maintains highly repeatable test results under diverse working conditions. It acts as an essential supporting module for a Reliable Relay Tester, effectively reducing measurement errors caused by environmental changes and equipment differences. Fully compliant with strict industrial testing specifications, this integrated solution perfectly meets the application criteria of the industry’s top Best Relay Testers. Featuring simple operation steps, extensive testing coverage and outstanding universal compatibility, the new test solution significantly boosts overall power testing efficiency. Huzhou Aidi Electric Co., Ltd. will continue to focus on technological innovation and product optimization, providing reliable technical support for the safe, stable and standardized operation of global power relay and transformer systems, and striving to deliver more high-performance power testing solutions for partners worldwide.   Contact Person: Fei Zhigang   Email: 13506728162@139.com   Mobile: +86 13506728162   Address: Shangqiang Road, Daixi Town, Huzhou, Zhejiang, China

Huzhou, Zhejiang – Huzhou Aidi Electric Co., Ltd., a reputable specialist in the development and production of professional power system testing instruments, officially launches its newly upgraded AD106 Arrester On-line Monitor Comprehensive Tester to enrich its lineup of auxiliary testing accessories for mainstream power protection equipment. The newly released tester is engineered for full-range parameter detection, calibration and routine maintenance of arrester on-line monitors, designed to pair seamlessly with standard Relay Protection Tester to deliver complete technical support for arrester safety management within power grids, and it has gained wide application across power generation plants, transformer substations and professional electrical inspection institutes. Developed as matching auxiliary hardware for the premium-grade High Quality Relay Tester, the AD106 tester boasts outstanding measurement precision and stable operational performance. It can precisely capture all core operating parameters of arrester monitoring devices to secure steady functioning of overall arrester protection frameworks. Equipped with multi-layer built-in circuit protection modules, this product effectively prevents component breakdown triggered by unexpected voltage swings, qualifying it as an indispensable accessory for a trusted Reliable Relay Tester and enabling uninterrupted long-duration operation amid complicated and volatile field working conditions. Boasting streamlined structure and compact portable layout for effortless on-site manipulation, the AD106 stands out among compatible supporting devices for the market’s leading Best Relay Testers. Beyond reliable technical performance, the product is built as a cost-effective option under the framework of Affordable Relay Protection, balancing superior testing capacity and reasonable procurement cost. It perfectly fulfills diverse field calibration demands for arrester on-line monitors and builds solid technical safeguards for secure and steady running of global power distribution systems. Backed by the company’s decades of experience in power testing equipment manufacturing and strict in-house quality control standards, Huzhou Aidi Electric Co., Ltd. will continue optimizing the AD106 series through iterative technical upgrades. The enterprise aims to expand global market cooperation and supply cost-efficient, high-performance testing solutions for power industry clients worldwide, further consolidating its footprint in the international electrical testing equipment sector.   Contact Person: Fei Zhigang   Email: 13506728162@139.com   Mobile: +86 13506728162   Address: Shangqiang Road, Daixi Town, Huzhou, Zhejiang, China

Huzhou, China – May 30, 2026 – Huzhou Aidi Electric Co., Ltd., a high-tech enterprise specializing in power system testing instruments, officially announced the release of its latest flagship product, the AD292Z-B Automatic Instrument Transformer Multi Tester. Designed as a professional high-voltage transformer tester integrated with the advanced AD292Z digital mutual inductance analysis module, this new device delivers precise and reliable parameter detection for high-voltage transformers, power system calibration, and electrical equipment performance verification, bringing a cost-effective solution for Affordable Relay Protection in modern power grid infrastructure. Developed to meet the rigorous demands of harsh substation and industrial testing environments, the AD292Z-B features strong anti-interference capability, a wide testing range, and intuitive real-time data output. It perfectly complements the functional system of a High Quality Relay Tester, effectively addressing core challenges in transformer-relay matching and secondary circuit parameter calibration. As an upgraded auxiliary device for mainstream testing equipment, it significantly optimizes the overall working performance of a standard Relay Protection Tester during daily power maintenance and emergency troubleshooting tasks. Adopting industrial-grade hardware components and optimized digital algorithms, the AD292Z-B ensures consistent, repeatable, and accurate test results even in long-term field operation. It serves as an essential supporting tool for a Reliable Relay Tester, minimizing data deviation caused by environmental interference, temperature fluctuations, and equipment aging. Fully compliant with international and industry testing standards, this versatile high-voltage tester meets the strict calibration requirements of the Best Relay Testers available on the global market. Lightweight, compact, and easy to operate, the AD292Z-B greatly improves on-site testing efficiency while reducing manual operation errors. It provides robust technical guarantees for the safe and stable operation of high-voltage power transformation and relay protection systems, making it an ideal choice for power utilities, engineering companies, and industrial enterprises worldwide. About Huzhou Aidi Electric Co., Ltd. Founded in 1998, Huzhou Aidi Electric Co., Ltd. is a leading manufacturer of power system testing and monitoring equipment in China. With over 20 years of technical experience and continuous innovation, the company offers a comprehensive range of products including relay protection testers, instrument transformer testers, high-voltage generators, and other specialized electrical testing devices. Committed to “quality-oriented, service to society,” Huzhou Aidi Electric Co., Ltd. strives to deliver high-quality, reliable, and cost-effective solutions for the global power industry.