Oil Immersed transformer 8 MVA 33 KV Auto Power Transformer

8 MVA 33 KV Auto Power Transformer

Rated voltage	33kv
Rated capacity	8mva
Application scenarios	Urban Distribution Networks，Industrial & Mining，Renewable Energy Integration，Large-Scale Commercial Hubs，
Certifications & Standards	TÜV -issued CE • CB IEC EN ISO 9001• 14001• 45001

8 MVA 33 KV Auto Power Transformer

An 8 MVA 33 KV auto power transformer is a three-phase electrical device designed for voltage regulation and power distribution in medium-voltage networks. Unlike traditional two-winding transformers, it uses a single integrated winding to transfer electrical energy, making it more efficient for applications where input and output voltages share a common terminal. Compliant with international standards like IEC 60076 and ANSI, this transformer is a cornerstone of modern power infrastructure, trusted in over 50 countries globally .

Key Application Verticals

The versatility of the 8 MVA 33 KV autotransformer makes it indispensable across critical sectors:

Urban Distribution Networks: Steps down 33 KV grid power to 6.6 KV or 0.4 KV for residential and commercial supply, as deployed in cities across South Africa and the Middle East .

Industrial & Mining: Powers heavy machinery in mining operations (Zimbabwe, Sudan) and manufacturing plants, withstanding high-load cycles and harsh environments .

Renewable Energy Integration: Connects 33 KV solar/wind farms to the main grid, ensuring stable voltage conversion for 50/60 Hz systems .

Large-Scale Commercial Hubs: Supplies reliable power to airports, railway stations, and shopping malls, supported by its low-noise operation .

8 MVA-33/33 KV Transformer Testing

Unmatched Advantages Over Traditional Transformers

Energy Efficiency: Features ultra-low no-load losses (7.87 kW typical) and load losses (40.6 kW), reducing operational costs by 15-20% compared to conventional models .

Compact Design: Shared winding technology cuts material usage by 30%, enabling installation in space-constrained substations .

Enhanced Reliability: Fully sealed corrugated tanks prevent oil oxidation, extending service life to 25+ years, with a 0-fault rate record in 10+ years of field use .

Voltage Flexibility: Equipped with OLTC (On-Load Tap Changer) for ±2×2.5% voltage adjustment, adapting to grid fluctuations .

Global Compliance: Certified by KEMA, EAC, and ISO 9001, meeting regulatory requirements in Africa, Asia, and the Middle East .

8 MVA power transformer diagram drawing and size.

Technical Specifications (Typical)

Parameter	Value
Rated Capacity	8000 KVA (8 MVA)
Primary Voltage	33 KV
Secondary Voltage	6.6 KV / 0.4 KV
Cooling Method	ONAN (Oil Natural Air Natural)
Impedance	8%
Vector Group	Dyn11 / YNd11
Core Material	CRGO Silicon Steel
Winding Material	Copper/Aluminum
No-Load Loss	7.0–7.87 kW
Load Loss (at 75°C)	40.6–60 kW
Frequency	50/60 Hz
Protection Features	Pressure Release Valve, Oil Level Gauge