On August 14, 2025, Goldhome's independently developed HM-YDJ-300kVA/150kV power frequency test transformer was officially loaded onto a truck and shipped to Singapore.
On August 14, 2025, the Goldhome factory grounds were bustling with activity yet remained orderly. An HM-YDJ-300kVA/150kV power frequency test transformer, entirely independently researched, designed, and manufactured by the company, successfully completed all factory tests and performance verification, entering the final stage of export packaging and shipment. Workers collaborated efficiently, carrying out processes such as anti-vibration reinforcement of the main unit, independent packaging of high-voltage bushings, and protection of control cables, creating a scene of intense yet orderly activity. A heavy-duty truck fully loaded with the equipment was about to leave the premises, bound for Singapore to be delivered to a Southeast Asian client.
The technical supervisor closely monitored the packing process throughout, meticulously verifying the shipping list and export protection plan item by item to ensure this high-voltage test equipment remains safe and undamaged during long-distance sea and land transport, in full compliance with international shipping standards.
Product Advantages: Highly Reliable Power Frequency Test Transformer, Precisely Meeting Medium- and High-Voltage Electrical Testing Requirements
The HM-YDJ-300kVA/150kV power frequency test transformer shipped this time is a flagship product from Goldhome in the field of AC withstand voltage testing, featuring the following outstanding advantages:
- Superior Rated Parameters: With a rated capacity of 300kVA and a maximum output voltage of 150kV, it meets the power frequency withstand voltage test requirements for 10kV, 35kV, and some 66kV-class power equipment. It is widely used for factory acceptance and preventive testing of power equipment such as transformers, switches, current transformers, and cables.
- Compact Structure and Reliable Insulation: Featuring an oil-immersed iron-casing design with concentric arrangement of high- and low-voltage windings, it provides ample insulation margin. The casing undergoes special grounding treatment, resulting in low partial discharge levels and stable operation.
- Strong Compatibility with Voltage Regulation and Control: Compatible with voltage regulation consoles, capacitive voltage dividers, and protective spark gaps, it supports manual/automatic voltage regulation and is equipped with overcurrent, overvoltage, and flashover protection functions.
- Adapted for tropical climates: Optimized insulation oil treatment processes and sealing designs specifically for Singapore's high-temperature, high-humidity environment ensure long-term leak-free operation and consistent insulation performance under tropical conditions.
- Export Packaging: Rigorous Protection to Ensure Safety During International Long-Distance Transport
- In response to the characteristics of sea freight for export orders to Singapore and the high-humidity environment there, Goldhome has implemented a high-standard export packaging solution:
- Main Unit Shock Protection: The test transformer's main body is secured within a steel-reinforced frame and high-density foam cushioning layer. The entire unit is hoisted into an export-grade fumigation-free plywood crate, with shock-absorbing wooden blocks added to the bottom and all gaps between the crate and the cargo completely filled.
- High-Voltage Bushing Protection: As precision insulation components, the high-voltage bushings are first wrapped in anti-static foam sleeves and then secured within the crate using wooden supports to prevent impact during transit.
- Moisture-Proof Sealing: High-efficiency desiccants are placed inside the packaging for the main unit and accessories. The outer layer is fully sealed with PE moisture-proof film, and the wooden crate is spray-painted with Chinese and English labels such as "Keep Dry" and "Handle with Care."
- Accessory Inventory: The voltage regulation control unit, connecting cables, grounding wires, manuals, and factory test reports are individually sealed in waterproof bags and packed together in the crate. Quality control personnel document the entire process with photographs.
This 300kVA/150kV power frequency test transformer is a customized export unit designed to meet Singapore's local voltage and frequency specifications (230V/400V, 50Hz) as well as safety standards. From confirming customer requirements, designing solutions, scheduling material production, and assembly and debugging to final factory acceptance, Goldhome leveraged its mature flexible production system and comprehensive supply chain resources to complete the entire manufacturing and debugging process in less than 30 days. The unit passed the customer's commissioned third-party remote video acceptance inspection on the first attempt and was delivered on time.
"150kV-class power frequency test transformers have strict requirements for insulation treatment, partial discharge control, and sealing, especially for exports to tropical regions, where we have specifically enhanced moisture-proofing and heat dissipation designs," said Goldhome's production manager. "All factory-release specifications exceed the requirements of IEC 60060 and the customer contract, once again demonstrating Goldhome's mass production capabilities and technical expertise in the field of power frequency test transformers."
