Zhejiang Jiangshan Hengli Electrical Co., Ltd. is one of the leading manufacturers and suppliers of delta star distribution transformer in China. If you're going to wholesale durable delta star distribution transformer made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.
A Delta Star (Δ-Y / Dyn11, also known as Delta Wye) distribution transformer refers to a transformer with delta-connected primary winding and star-connected secondary winding, which is the most widely used vector group for distribution networks.
Winding Connection
- Primary (High Voltage): Delta (Δ) connection
- Secondary (Low Voltage): Star (Y) connection, equipped with a neutral terminal.
As a professional delta star distribution transformer manufacturer with a fully integrated production line, we supply reliable, energy-efficient transformers directly from our factory, ensuring competitive pricing and fast delivery.Our power and distribution transformers are engineered with advanced technology and built using high-quality materials and components, ensuring dependable performance and extended service life.
Key Features
The secondary neutral point of a delta star distribution transformer can be grounded, supplying 3-phase + single-phase power simultaneously (e.g. 400V three-phase / 230V single-phase), perfectly matching residential and commercial loads. The delta primary blocks zero-sequence currents, improving grid stability and restraining third-harmonic distortion.Dyn11 (the standard delta-star vector group) delivers a 30° phase shift, lowering harmonic interference.
Typical Application
It is the mainstream type for oil-immersed distribution transformers. Commonly installed in intermediate substations, kiosk substations and pole-mounted stations, to deliver medium voltage down to low-voltage power for factories, communities and urban infrastructure.
Types of Connections Of A 3-Phase Distribution Transformer
Three-phase distribution transformers are equipped with three sets of primary and secondary windings supporting multiple connection configurations to achieve different voltage and current requirements.
Delta-Delta connection fits balanced loads with a 1:1 transformation ratio.
Delta-Star is widely adopted to handle unbalanced loads for high-to-low voltage conversion.
Star-Star: The three primary wires form a star connection with the three secondary cables, and vice versa.
Autotransformer connections share part of the windings, deliver adjustable voltage and are extensively used in power transmission networks.
Why Choose a Chinese Transformer Manufacturer as Your Partner?
As a global core production base for transformers, China brings you multiple notable strengths:
- Mature supply chains for raw materials and components
- Cost-effective pricing versus suppliers from other markets
- Sophisticated production technologies and reliable product quality
Hengli Electrical, based in Jiangshan, Zhejiang, integrates the strengths of China's manufacturing with decades of experience in power transformer industry. We deliver tailored transformer solutions that meet diverse market requirements across the globe.
How to Get a Transformer Quotation
Please provide the following parameters so we can prepare an accurate quotation for you. You may attach your SLD or specification sheet if available.
Quantity,Destination & Application scenario
Power Rating (Rated Capacity)
You can provide either load capacity in KW or the voltage transformer power in KVA.
Input & Output Voltage
Input voltage is the mains supply voltage, and output voltage is the voltage that load needs.
Frequency: 50Hz or 60Hz
Phases: Three or single
Insulation Class
Both F and H insulation class are available for choice, the default insulation level is F.
Vector Group
Please specify Dyn11 or Yyn0 vector group, Delta or Wye (star) connection.
Winding Material
Both Aluminum and Copper are available for choice.
We're a professional distribution transformer manufacturer and supplier in China, specialized in providing high quality customized products with competitive price. We warmly welcome you to wholesale transformers made in China here from our factory.
Testing & Quality Assurance
Each three phase distribution transformer undergoes strict testing procedures before shipment:
- Winding resistance measurement
- Voltage ratio and vector group test
- No-load and load loss testing
- Insulation resistance and withstand voltage test
- Temperature rise test (optional)
All products comply with IEC 60076, other major international standards
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