In the field of international power equipment exports, Hengfengyou Electric has once again earned the profound trust of international clients through superior product quality and a rigorous service attitude. Recently, the company successfully completed the manufacturing, on-site Factory Acceptance Test (FAT), packing, and shipment of a 20MVA 22/11kV power transformer tailored for a large-scale coal mining operation in South Africa.
 

I. Customized Engineering Tailored for Harsh Mining Conditions

Located in a key mining area in South Africa, the project presents a challenging operating environment characterized by heavy coal dust, severe load fluctuations, and exceptionally strict requirements for power supply continuity. After conducting comprehensive research on local South African grid specifications (such as SANS standards) and actual site operating conditions, Hengfengyou Electric's technical team custom-engineered this 20MVA power transformer:

• Rated Voltage: 22 kV / 11 kV, precisely matched with the site’s existing high-voltage distribution network.

• Cooling & Enclosure Protection: Features high-efficiency oil-immersed cooling with enhanced tank sealing and ingress protection ratings (IP), ensuring continuous and stable operation under South Africa’s scorching climate and dust-laden environments.

• Overload & Short-Circuit Withstand Capability: Optimized winding mechanical strength and insulation layout significantly enhance the transformer’s capacity to endure frequent motor starts, sudden load spikes, and short-circuit impacts—delivering uninterrupted and reliable power for heavy mining operations.

II. Rigorous On-Site FAT: Client Witnessing & High Acclaim for Quality

To guarantee full compliance with international standards and contractual specifications, representatives from the South African client, together with independent third-party inspection engineers, visited Hengfengyou Electric’s manufacturing facility to conduct a multi-day on-site Factory Acceptance Test (FAT).

Throughout the FAT process, Hengfengyou Electric's engineering team worked in close synergy with the client. In strict accordance with IEC standards, key routine and type tests were performed, including:

• Winding DC Resistance Measurement

• Voltage Ratio & Vector Group Verification

• Insulation Resistance & Dielectric Dissipation Factor (Tan δ) Testing

• Power-Frequency Withstand Voltage Test

• Partial Discharge (PD) Detection

• No-Load & Load Loss Measurements

All measured parameters comfortably surpassed the design thresholds and international benchmark standards. The South African delegation expressed high praise for Hengfengyou Electric’s advanced testing facilities, comprehensive Quality Management System (QMS), and professional rigor, officially signing the FAT Acceptance Report on-site.

III. Professional Logistics & Moisture-Proof Packing: Ensuring Ocean Transit Safety

Following the successful FAT, Hengfengyou Electric’s logistics team immediately executed a specialized packaging and transport plan engineered for heavy electrical apparatus.

Taking into account environmental dynamics during transoceanic shipping and local inland transport, multi-layer protective packaging—featuring moisture-proof, anti-salt-spray, and high-tensile shock-absorption barriers—was applied to the main transformer body and auxiliary components. Heavy-duty rigging equipment was utilized for precision container loading, coupled with multi-point steel wire lashing to ensure total cargo integrity throughout the transit. The equipment has now been delivered to the port and loaded for voyage.

IV. Hengfengyou Electric: Your Trusted Power Partner in South Africa

The successful delivery of this 20MVA transformer not only highlights Hengfengyou Electric’s R&D and manufacturing prowess in large-scale power transformers, but also further reinforces its brand influence across South Africa and the broader African continent. Hengfengyou Electric remains dedicated to delivering high-performance, customized, turn-key power solutions for global mining, industrial, and public utility sectors.

Business Inquiries & Partnership Contact

If you have procurement or project requirements for power transformers, distribution switchgear, or related electrical equipment in South Africa or neighboring regions, please feel free to contact our dedicated team:

• Head of South African Market: Jack

• Email: hfy@hengfengyou.com