Empowering Overseas Infrastructure | Ningbo Tian’an Transformer and Switchgear Complete Sets Shipped to Zambia
In August 2026, the system independently designed and manufactured by Ningbo Tian’an… SFZ - 20000/33-11 Three-phase oil-immersed on-load tap-changing power transformer , supporting facilities 9 units of KYN61-40.5/1250A-31.5kA armored, withdrawable high-voltage switchgear cabinets Following the completion of the full set of factory acceptance tests, the equipment will be officially packed and shipped, with delivery to the Zambia project site by sea.
This project involves the integrated delivery of a main transformer and high-voltage switchgear as a complete package, with all core primary equipment sourced from a single supplier, facilitating on-site installation coordination and subsequent operation and maintenance for overseas projects.
I. Product Configuration and Adaptation to Local Operating Conditions
SFZ - 20000/33 - 11 Main Transformer
Rated capacity: 20,000 kVA; voltage class: 33/11 kV; winding connection group designation: YNd11; cooling method: ONAN/ONAF; equipped with an on-load tap changer, enabling voltage tap adjustments without power interruption, and suitable for the Zambian grid’s operating conditions characterized by significant load fluctuations.
In response to Zambia’s high-temperature, dusty environmental conditions, the equipment has been optimized with an increased thermal margin, reinforced sealed dust‑proof structures, and low‑loss core materials, thereby reducing long-term operational losses and enhancing its reliability under outdoor operating conditions in Africa.
KYN61-40.5 Armored Withdrawable High-Voltage Switchgear
This delivery comprises a total of 9 units, with a rated voltage of 40.5 kV, a rated current of 1250 A, and a short-time withstand current of 31.5 kA, serving the control, protection, and monitoring of 33-kV distribution circuits.
The cabinet is equipped with comprehensive five‑protection interlocking functions, reducing the risk of on-site misoperation; it adopts an armored compartmentalization structure and is fitted with pressure‑relief channels; the product meets IEC 62271‑200, GB/T 3906 Standard, adapted to the operating conditions of indoor substations in Africa.
II. End-to-End Manufacturing and Factory Quality Control
In this batch, the equipment undergoes standardized process control across the entire production flow, from incoming material inspection and component machining to core assembly, insulation treatment, and final complete‑machine integration.
● The transformer has undergone a complete set of factory tests, including winding DC resistance, turns ratio and polarity, insulation, dielectric strength, no-load losses, and load losses.
● The switchgear has completed test items including loop resistance, mechanical characteristics, power-frequency withstand voltage, and interlocking verification.
All equipment must meet the technical specifications stipulated in the contract’s technical agreement before it can be approved for factory shipment. The integrated, single-source supply model reduces the risks associated with cross‑interface coordination among multiple vendors, thereby facilitating the delivery and operation & maintenance of overseas projects.
III. Continuously Deepening Our Presence in the African Power Infrastructure Market
This shipment marks another batch of equipment delivered by Tian’an Electric to the Zambian market for the 2026 fiscal year. As early as June 2026, the company had already supplied Zambia with distribution transformers in multiple specifications, including models rated at 2,000 kVA, 1,250 kVA, and 200 kVA, supporting local grid‑upgrade and modernization projects.
In recent years, Tian’an Electric has steadily expanded its presence in the African power market, deploying equipment in Zambia, Rwanda, Kenya, Ethiopia, and other countries, covering new substation construction as well as renovation and expansion projects. The company has established an integrated supply capability for distribution transformers, main transformers, medium-voltage switchgear, and complete substations. Leveraging the technological expertise and production capacity of its Ningbo manufacturing base, Tian’an continues to provide robust electrical equipment support for Africa’s grid infrastructure development.
News-Related FAQ
| Q: What equipment is included in this shipment to Zambia from Ningbo Tian’an? A: One SFZ‑20000/33‑11 oil-immersed on-load tap-changing transformer, and nine KYN61‑40.5 armored withdrawable high-voltage switchgear cabinets. |
| Q: What operating conditions in Zambia are the equipment designed to accommodate? A: In response to local conditions—high temperatures, dusty environments, and significant grid load fluctuations—the transformer features enhanced sealing for dust protection, an increased thermal margin, and on‑load tap changers. The switchgear complies with IEC international standards and is well suited to the indoor substation requirements in Africa. |
| Q: Which African countries does Tian’an Electric have projects in? A: Our products have been successfully deployed in Zambia, Rwanda, Kenya, Ethiopia, and other countries, and we can provide integrated turnkey solutions for transformers, switchgear, and complete substations. |
| Q: What standard does this product comply with? A: Complies with IEC 62271‑200 and GB/T 3906, while also meeting the technical specifications outlined in the project contract. |
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