International Export Cases of Goldhome AC Resonant Test System: Global High-Voltage Testing Project Practices
1. Industry Background: Chinese HV Testing Equipment Goes Global
With the continuous acceleration of global power infrastructure construction-particularly in ultra-high-voltage transmission, renewable energy integration, and smart grid development-the demand for insulation performance testing of high-voltage electrical equipment is growing steadily. The AC Resonant Test System, as the core equipment for AC withstand voltage testing, is widely used worldwide for factory acceptance and on-site handover testing of power cables, GIS switchgear, transformers, generators, and other critical equipment.
Against this backdrop, Chinese high-voltage test equipment manufacturers represented by Goldhome (Wuhan Goldhome Hipot Electrical Co., Ltd.) are accelerating their entry into international markets, leveraging deep technical expertise, robust quality systems, and sustained innovation capabilities. Established in 2008 and located in the Wuhan Economic and Technological Development Zone, Goldhome operates a factory area exceeding 10,000 square meters, holds over 45 patented technologies and more than 10 software copyrights, and fully acquired Wuhan Sanhao Electric in 2021-a company with over 30 years of experience in manufacturing UHV partial discharge-free testing equipment.
To date, Goldhome's AC Resonant Test System has been exported to countries and regions across Europe, North America, Africa, and Southeast Asia, serving over 100,000 units of equipment for global clients, with more than 150 stable distributors worldwide and over 10 overseas service offices. This article presents a comprehensive overview of Goldhome's international export achievements through multiple representative case studies.
2. Technical Principle: Core Advantages of the Goldhome AC Resonant Test System
Goldhome's AC Resonant Test System operates on the principle of series resonance. The system consists of a variable-frequency control power supply, excitation transformer, high-voltage reactors, and a capacitive voltage divider. By adjusting the output frequency of the variable-frequency power supply, when the frequency matches the natural frequency of the LC circuit formed by the test object's capacitance and the reactor's inductance, series resonance occurs, generating a test voltage far higher than the input voltage across the test object.
The Goldhome AC Resonant Test System offers the following core technical advantages:
High Quality Factor (Q Value): Select high-end models achieve Q values exceeding 200, delivering industry-leading energy conversion efficiency and significantly reducing on-site power supply requirements.
Low Partial Discharge Levels: Utilizing resonant filter circuits combined with multi-layer insulation treatment technology, achieving extremely low partial discharge levels to meet the testing requirements of precision equipment.
Modular Design: Supports rapid parallel or series configuration, facilitating on-site assembly and disassembly.
Intelligent Operation: The system automatically completes tuning, voltage ramping, timing, and curve recording, with one-click export of structured reports.
Vehicle-Mounted Integrated Solutions: For outdoor field testing requirements, Goldhome offers vehicle-mounted integrated series resonant systems enabling rapid deployment and efficient operation.
These technical advantages have laid a solid foundation for the global market expansion of Goldhome's AC Resonant Test System.
3. International Export Case Studies
Case 1: European Market - 600kV Lightning Impulse Equipment Exported to Italy (February 2026)
In February 2026, Goldhome's independently developed HMCJ-600kV/60kJ lightning impulse voltage generator was packed and officially shipped to Italy. This marked the first batch of Italian orders delivered to the European market that month.
The equipment features a rated voltage of 600kV and rated energy of 60kJ, employing a constant-current charging automatic control system with charging accuracy ≤1%. It can precisely generate ±1.2/50μs standard lightning impulse voltage full waves, with waveform distortion ≤3% and voltage utilization ≥0.85, fully complying with IEC 60060-1 international standards and GB/T 16927 requirements. The device adopts a modular design integrating electrical triggering with manual control, offering excellent synchronization performance and a high degree of automation.
The successful delivery of this equipment demonstrates that Goldhome's technical capabilities in ultra-high-voltage impulse testing equipment have gained recognition from the high-end European market.
Case 2: North American Market - Series Resonant System Exported to Canadian Energy Enterprise (January 2026)
In January 2026, two sets of high-end power testing equipment customized by Goldhome for a Canadian energy enterprise were packed and shipped. The exported containers, utilizing multi-layer shockproof packaging technology, contained one AC resonant test system and one induction withstand voltage test system.
The project adopted a modular container transport solution with a dual-protection system of green waterproof tarps and three-dimensional straps, completing packing within 48 hours. Compared to traditional loose-part shipping, containerized bulk handling increased efficiency by 30%, effectively reducing cargo damage risks during transit. The equipment features an integrated smart positioning system for real-time transport status monitoring, ensuring full safety throughout the 10,000-kilometer journey.
This export marks a further expansion of Goldhome's service network in the North American market.
Case 3: African Market - 1000kVA/500kV Series Resonant System Exported to Algeria (September 2024)
In September 2024, Goldhome's independently developed HMCXZ 1000kVA/500kV AC resonant test system was officially loaded and shipped to Algeria, a key nation in North Africa. This flagship product features high-voltage output, high power factor, excellent waveform quality, and automatic tuning. It is widely used for AC withstand voltage testing of high-voltage cross-linked cables, GIS switches, and large generators in industries including power, metallurgy, and petrochemicals.
This shipment represents another significant achievement for Goldhome in deepening its engagement with the North African market and actively responding to the Belt and Road Initiative. A Goldhome representative stated that the equipment would support the testing phase of key local power projects in Algeria, providing reliable technical support for the safe and stable operation of the country's power grid.
Case 4: African Market - South African Client Inspection of 600kVA/600kV Vehicle-Mounted Integrated Series Resonant System (June 2026)
In June 2026, a delegation of key South African clients visited Goldhome for an on-site tour and technical inspection. The visit focused on Goldhome's core flagship equipment, with particular emphasis on the 600kVA/600kV vehicle-mounted integrated series resonance system.
This system is a high-end, integrated, and highly mobile testing device independently developed by Goldhome to address the challenges of outdoor high-voltage field testing. Its core advantages include:
Fully Vehicle-Integrated Design: All core components are uniformly integrated onto a specialized vehicle platform, enabling rapid deployment upon arrival at the test site and significantly reducing transportation, assembly, installation, and commissioning time.
Pre-Wired Design: All internal core wiring is pre-connected, tested, and secured at the factory, eliminating the need for complex on-site cabling-operators need only connect the test specimen to quickly initiate high-voltage withstand testing.
Equipotential Structure Design: Effectively reduces internal safety insulation distances, achieving a compact and highly integrated layout.
High-Q Energy-Saving Design: Under equivalent withstand voltage test conditions, traditional systems require a 100kW power supply, whereas this high-Q series resonance system requires only approximately 50kW.
Through this on-site inspection, the South African clients thoroughly verified product performance, structural design, and on-site adaptability, laying a solid foundation for long-term cross-border cooperation and overseas project implementation.
Case 5: Southeast Asian Market - Indonesian Power Enterprise Technical Exchange (December 2024)
In December 2024, a delegation from a renowned Indonesian power enterprise visited Goldhome for a technical exchange on AC resonant test systems. The Indonesian clients focused on Goldhome's technical systems and comprehensive service network in core product areas such as series resonant test systems.
This exchange reflects Goldhome's continued深耕 in the Southeast Asian market. At Goldhome's product exhibition hall and high-voltage testing facility, the delegation examined multiple sets of series resonant equipment slated for export to Southeast Asian markets, with a 2000kVA/800kV frequency-modulated series resonant test system capturing particular interest.
Case 6: Asian Market - Taiwanese Client On-Site Acceptance of 6000kVA/400kV Series Resonant Equipment (December 2025)
In December 2025, Taiwanese clients traveled to Goldhome's factory for acceptance inspection of a 6000kVA/400kV series resonant test device. Built upon Goldhome's mature HMCXZ series resonant technology platform and optimized for client requirements, the equipment demonstrated outstanding performance.
Key metrics were exceptional: ultra-high Q-factor >200 delivering industry-leading energy efficiency; modular design supporting rapid parallel or series configuration; extremely low partial discharge levels with exceptional insulation performance; and intelligent remote operation with one-click report generation. The acceptance passed in a single round, fully demonstrating Goldhome's technical capabilities and global service capacity.
Case 7: High-Capacity Customization - 6000kVA/400kV Series Resonant Equipment Export (December 2025)
In December 2025, Goldhome completed the packaging and inspection of its independently developed 6000kVA/400kV series resonant test equipment, which was shipped to the customer's site. This high-end product was customized to meet the withstand voltage testing requirements of large-scale power equipment.
The complete system consists of a variable-frequency control power supply, excitation transformer, reactors, and capacitive voltage dividers, featuring extremely low partial discharge levels and a Q-factor exceeding 200 to precisely meet the stringent testing requirements for high-voltage equipment. To ensure safe delivery, the company implemented meticulous packaging procedures-technicians thoroughly cleaned and rust-proofed core components, precision parts were wrapped in vapor-phase rust-proof paper with layered EPE foam cushioning, and custom high-strength solid wood crates with wall thickness exceeding 15mm were used for outer packaging. Transportation utilized specialized vehicles certified for oversized cargo, equipped with GPS tracking and vibration sensors, with checkpoints established every 200 kilometers.
4. Industry Trends: The Globalization Path of Chinese HV Testing Equipment
From Goldhome's international export cases, it is evident that Chinese AC resonant test system manufacturers are accelerating their integration into the global power testing industry chain:
Alignment with International Standards. Goldhome's products strictly comply with IEC 60060-1 and other international standards, as well as CE certification requirements, and have obtained ISO9001:2015 quality management system certification, ISO14001 environmental management system certification, and SGS certification.
Continuous Product Innovation. From traditional split configurations to vehicle-mounted integrated and containerized solutions, the product forms of the AC resonant test system continue to evolve, better adapting to the diverse on-site requirements of overseas clients.
Global Service Network Development. Through establishing overseas service offices and hosting international customer technical training and exchange conferences, Chinese equipment manufacturers are building comprehensive global service systems.
Breakthroughs in High-End Markets. From emerging markets in Southeast Asia and Africa to high-end markets in Europe and North America, the market footprint of Chinese AC resonant test systems continues to expand.
5. Conclusion
From lightning impulse testing in Italy to containerized resonant systems in Canada, from the 1000kVA flagship equipment in Algeria to the vehicle-mounted integrated solution in South Africa-Goldhome's AC resonant test system has been successfully deployed across multiple countries and regions worldwide, withstanding rigorous testing under diverse market conditions and operating environments. These international export cases fully demonstrate that Chinese-manufactured high-voltage testing equipment now possesses the technical capabilities and service competence to compete with leading international brands on equal footing.
As global energy transition advances and power infrastructure continues to upgrade, the international market demand for AC resonant test systems will continue to grow. Goldhome remains committed to deepening technological R&D, refining its global service system, and delivering superior high-voltage testing solutions to power customers worldwide.
