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A 33kV/11kV oil-immersed transformer specifically designed for regional main step-down substations. It has demonstrated outstanding performance in large-scale power grid construction in Africa and the Middle East, serving as a key node connecting the main grid and terminal distribution networks.
Order(MOQ) :
1 UnitPrice Range :
55,000.00 USD/ Unit
Engineered for high-demand secondary substations and large industrial parks, our 33kV to 11kV oil-immersed step-down transformers deliver robust power distribution with capacities ranging from 1000kVA to 5000kVA. Supporting seamless parallel operation, these units scale effortlessly with your expanding grid infrastructure.
For exceptional reliability, each transformer integrates advanced safety monitoring, including precision gas relays and pressure relief valves. Additionally, the optional ONAF forced air cooling system significantly boosts emergency load capacity during peak power demands. Protected by a heavy-duty, corrosion-resistant coating, this substation transformer guarantees long-lasting durability and continuous operation even in challenging, high-humidity tropical environments.
Our standard export packaging ensures your transformers arrive safely, no matter the destination. (Note: Images demonstrate our standard factory bulk packaging and container loading capabilities).
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High-Capacity Configuration: Power range from 1000kVA to 5000kVA, supporting parallel operation.
Overload Protection: ONAF forced air cooling optional, enhancing emergency load capacity during peak power demand.
Safety Accessories: Equipped with a complete set of safety monitoring devices, including gas relays and pressure relief valves.
Corrosion-Resistant Coating: Utilizes a long-lasting anti-corrosion process to withstand high humidity tropical environments.
Secondary substations, large industrial parks, and cross-regional power grid interconnection.
Secondary substations
Large industrial parks
Cross-regional power grid interconnection
✔ Scalable High-Capacity Architecture
Engineered to seamlessly support your expanding grid infrastructure. Covering a robust power range from 1000kVA to 5000kVA, our 33kV to 11kV step-down transformers are fully optimized for parallel operation. This guarantees flexible, uninterrupted power distribution for your growing secondary substations and large-scale industrial parks.
✔ Advanced Safety & Active Monitoring
Safeguarding your critical assets is our top priority. Every unit is comprehensively equipped with a complete set of precision safety monitoring devices, including highly sensitive gas relays (Buchholz relays) and automatic pressure relief valves. This proactive protection system ensures immediate fault isolation and maximum operational safety.
✔ Enhanced Emergency Overload Capacity (ONAF)
Designed to maintain grid stability during unexpected peak demands. By integrating optional ONAF (Oil Natural Air Forced) cooling technology, these transformers significantly boost their emergency load-carrying capacity. This ensures your network remains resilient and operational even under severe stress in cross-regional grid interconnections.
✔ Tropical-Grade Anti-Corrosion Resilience
Purpose-built to thrive in the world's most demanding climates. The exterior housing utilizes a heavy-duty, multi-layer anti-corrosion coating process specifically formulated to withstand the high humidity, extreme temperatures, and corrosive elements typical of tropical environments in Africa and the Middle East, ensuring a significantly extended service life.
Q1: Can these 33kV to 11kV step-down transformers be operated in parallel for expanding industrial parks?
Yes. Our 1000kVA to 5000kVA oil-immersed transformers are specifically engineered to support seamless parallel operation. This high-capacity configuration allows secondary substations and large industrial parks to easily scale their power distribution networks as load demands increase. It ensures grid stability and future-proofs your infrastructure without the immediate need to completely replace existing power equipment.
Q2: How does the optional ONAF cooling system benefit cross-regional power grid operations?
While our standard ONAN (Oil Natural Air Natural) cooling provides exceptional baseline performance, integrating the optional ONAF (Oil Natural Air Forced) system significantly enhances the transformer's emergency load-carrying capacity. During unexpected peak power demands or sudden surges in cross-regional grid interconnections, the forced air cooling actively accelerates heat dissipation, preventing overheating and ensuring uninterrupted, safe power delivery.
Q3: Are these 33kV oil-immersed transformers suitable for high-humidity tropical environments in Africa and the Middle East?
Absolutely. We understand the environmental challenges of tropical and desert climates. The exterior of these transformers utilizes a specialized, long-lasting anti-corrosion coating process designed to withstand extreme humidity and harsh weather elements. Furthermore, they are equipped with a complete set of safety monitoring devices, including precision gas relays and pressure relief valves, ensuring decades of reliable, safe operation in the most demanding regional networks.
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