8MVA 33/6.6/0.4kV Three-winding Oil-immersed Transformer Shipped Successfully

GNEE Electric, a reputable global supplier of power transmission and distribution equipment, has successfully shipped a customized 8MVA 33/6.6/0.4kV three-winding oil-immersed power transformer. Tailored for an overseas industrial power distribution project, this high-capacity transformer will deliver reliable, efficient multi-level voltage conversion to support stable and sustainable local power grid operation.

Modern integrated industrial power projects pose strict demands on diversified and cost-effective power supply systems. The client encountered critical challenges with conventional power solutions.

1. Standard dual-winding transformers fail to satisfy their tri-voltage power demand, including 33kV high-voltage incoming power, 6.6kV medium-voltage equipment power, and 0.4kV low-voltage auxiliary and civilian power.
2. Deploying multiple separate transformers resulted in higher project costs, larger floor occupancy, and complex circuit layout.
3. Furthermore, traditional transformers feature high operating losses, low voltage regulation precision and poor load adaptability, causing frequent power fluctuations that jeopardize continuous industrial production under long-term full and variable-load conditions.

 

To resolve these pain points, GNEE Electric provided a professional customized three-winding transformer solution.

• The exclusive 33/6.6/0.4kV three-stage voltage design realizes multi-voltage power distribution with a single unit, effectively cutting equipment investment and installation space while simplifying the entire power distribution framework.
• Manufactured with high-quality oriented silicon steel sheets and pure copper windings, the transformer minimizes no-load and load losses to achieve outstanding energy-saving performance.
• Optimized electromagnetic structure and precision winding craftsmanship ensure accurate voltage regulation and superior overload resistance, perfectly adapting to long-duration full-load and frequent variable-load operation scenarios.

 

Technical Specification of 8 MVA power transformer

 

8 MVA power transformer specification and data sheet

Delivered to	South Africa
Year	2026
Model	8 MVA-33/6.6(0.4) KV
Type	Oil Immersed Power Transformer
Standard	IEC60076 & SANS780
Rated Power	8 MVA
Frequency	50 HZ
Phase	Three
Cooling Type	ONAN
Primary Voltage	33 KV
Secondary Voltage	6.6(0.4) KV
Winding Material	Copper
Vector Group	Dyn1yn1
Impedance	8%
Tap Changer	NLTC
Tapping Range	±2*2.5% @ Primary Side
No Load Loss	7 KW
On Load Loss	60 KW
Accessories	Standard Configuration
Remarks	N/A

 

General Arrangement Drawing for the 8 MVA transformer

 

8 MVA 33/6.6(0.4) KV Transformer Testing

 

Detailed Drawings of 8000KVA Transformer

 

Complying fully with IEC and IEEE international standards, the transformer has passed strict factory inspections, including pressure resistance and temperature rise tests, guaranteeing excellent insulation performance, operational stability and safety.

 

With over 18 years of dedicated R&D and manufacturing experience, GNEE Electric delivers reliable one-stop customized power distribution solutions for global clients.

 

This successful shipment highlights GNEE's strong technical prowess in high-capacity special transformer manufacturing, further strengthening the brand's influence in the global power equipment market and paving the way for more in-depth international cooperation.

 

 

Ready to Optimize Your Power Distribution with a Custom Engineered Solution?

 

Every industrial project has unique voltage requirements, space constraints, and efficiency goals. GNEE Electric doesn't just supply transformers - we deliver tailored, turnkey power solutions that reduce costs, save floor space, and ensure stable operation under the toughest conditions.

 

Whether you need:

• Multi-winding configurations (dual-voltage, three-voltage, or auto-transformers)
• Low-loss, energy-saving designs
• IEC, IEEE, or SANS compliant units
• Fast lead times with full factory testing

 

Contact GNEE Electric today. Share your project specifications, and our engineering team will respond within 24 hours with a customized proposal, technical drawing, and competitive quote.

Request A Quote

 

📧 Email: [sales@gneeelectric.com]
🌐 Web: [www.gneeelectric.com]
📞 WhatsApp/WeChat: [+86 15824687445]

 

Let's power your next project - reliably, efficiently, and affordably.

 

GNEE Electric Large Power Transformer Specification Sheet

Main Technical Parameters for oilimmersed power transformer
Rated Power(kVA)	High Voltage(kV)	H.V.Tap range	Low Voltage(kV)	Connection symbol	Short Circuit Impendance	No-load loss(kW)	On-load loss(kW)	No-load current(%)
6300	33 66 69 110 132 138 220	±8×1.25%	6.3 6.6 10.5 11 33 69	YNd11 YNyn0 others	10-14	9.4	34	0.63
8000					10-14	11.2	40.4	0.63
10000					10-14	13.1	47.6	0.75
12500					10-14	15.4	56.5	0.53
16000					10-14	18.5	69.5	0.49
20000					10-14	21.8	84.2	0.49
25000					10-14	25.6	99.5	0.4
31500					10-14	30.4	120	0.4
40000					10-14	36.2	140.3	0.39
50000					10-14	42.6	174.3	0.39
63000					10-14	52	210	0.39
75000					10-14	60	238	0.49
90000					10-14	69	274	0.49
120000					10-14	85	328	0.46
150000					10-14	101	385	0.42
160000					10-14	105	404	0.42
180000					10-14	115	436	0.42
240000					10-14	144	539	0.4