Distribution Transformer
Offer custom-designed products with varying voltage levels to meet the requirements of different national power grids and provide OEM services.
Distribution Transformer For Sale
Our distribution transformers utilize advanced technology to maximize high-voltage power step-down efficiency, minimizing energy transmission losses.
It is essential for stepping down high voltage electricity from substations to lower voltages suitable for residential, commercial and industrial use.
Main Parameters
Power rating: 10-20000 kVA
Primary voltage: 6-11 kV
Secondary voltage: 400V; 690V
Working Conditions
Altitude should not exceed 1000 meters
Operating environment temperature should be between -25โ and +40โ
The relative humidity should not exceed 90%(+25โ๏ผ
The vertical inclination does not exceed 5ยฐ.
The outdoor wind speed does not exceed 35m/s.
Tengyi Distribution Transformer Advantages
Premium Low-Voltage Design
Utilizing low-voltage copper foil winding with high-quality Class A insulation materials results in superior dielectric strength and long-term reliability.
High Mechanical Strength
The transformer’s low leakage flux and robust construction provide exceptional mechanical strength and superior short-circuit withstand capability.
Advanced Core Structure
The 45ยฐ full-skew stepped lamination core structure minimizes core losses, reducing noise and improving overall energy efficiency.
Superior Lightning Protection
Tengyi utilizes high-voltage copper strip winding technology that significantly enhances the transformer’s resistance to lightning strikes, ensuring reliable operation in extreme weather, even in stormy conditions.
Optimized Core Material
The use of high-quality cold-rolled grain-oriented silicon steel from reputable sources (Baosteel, Wuhan Iron and Steel) ensures low core losses, resulting in enhanced energy efficiency and reduced operating costs.
Superior Winding Insulation
The combination of copper foil (low voltage) and specialized insulated copper wire (high voltage) windings, along with superior insulation materials, ensures excellent dielectric strength and prevents insulation breakdown.
10 kV, 1600kVA Distribution Transformer Design
Specification
| Capacity | Rated voltage & Off-load tapping | Vector GroupSymbol | NO-load loss๏ผW๏ผ | Load loss๏ผW๏ผ | NO-load current(%) | Short circuit impedance(%) | ||
| H.V(kv) | High pressure Tap range(%) | L.V(kv) | ||||||
| 30 | 11 10.5 10 6.3 6 | ยฑ5% ยฑ2×2.5% | 0.4 0.69 | Dyn11 Yyn0 | 100 | 630/600 | 1.5 | 4 |
| 50 | 130 | 910/870 | 1.3 | 4 | ||||
| 63 | 150 | 1090/1040 | 1.2 | 4 | ||||
| 80 | 180 | 1310/1250 | 1.2 | 4 | ||||
| 100 | 200 | 1580/1500 | 1.1 | 4 | ||||
| 125 | 240 | 1890/1800 | 1.1 | 4 | ||||
| 160 | 280 | 2310/2200 | 1 | 4 | ||||
| 200 | 340 | 2730/2600 | 1 | 4 | ||||
| 250 | 400 | 3200/3050 | 0.9 | 4 | ||||
| 315 | 480 | 3830/3650 | 0.9 | 4 | ||||
| 400 | 570 | 4520/4300 | 0.8 | 4 | ||||
| 500 | 680 | 5410/5150 | 0.8 | 4 | ||||
| 630 | 810 | 6200 | 0.6 | 4.5 | ||||
| 800 | 980 | 7500 | 0.6 | 4.5 | ||||
| 1000 | 1150 | 10300 | 0.6 | 4.5 | ||||
| 1250 | 1360 | 12000 | 0.5 | 4.5 | ||||
| 1600 | 1640 | 14500 | 0.5 | 4.5 | ||||
| 2000 | 1940 | 18300 | 0.4 | 5 | ||||
| 2500 | 2290 | 21200 | 0.4 | 5 | ||||
About Tengyi
We are a premier enterprise specialising in designing, manufacturing, and testing a wide array of transformers.
Our advanced production facility covers over 11,000 square meters and features a maximum lifting capacity of 240 tons, allowing us to achieve an impressive annual production capacity of 12,000 MVA.
We provide transformers suitable for voltage ranges from 52 to 800 kV, with power ratings from 20 to 600 MVA, and our auto-transformers can reach capacities of up to 1,000 MVA.
Global Cases
Distribution Transformer Operation in Kazakhstan
Distribution Transformer Installed in Ghana
Distribution Transformer Operation in Lybia
Box Type Distribution Transformer in Kenya
Customer Feedback
Ivan Kibona
– from Tanzania
We’ve been using these Tengyi distribution transformers for the past five years at our industrial facility, and they’ve consistently exceeded expectations.
They’re incredibly reliable, requiring minimal maintenance. We’ve experienced zero downtime due to transformer failures. We’re very satisfied with the quality and performance of these units.
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Eng. Adiel Karima
– from Zimbabwe
The energy efficiency of these distribution transformers is truly impressive. Since switching to this new model, our energy bills have dropped considerably.
The reduced energy consumption is not only cost-effective but also contributes positively to our overall environmental sustainability goals. The transformer’s robust design and high-quality components clearly make a difference.
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Distribution Transformer Workshop
Distribution Transformer Production Details
What Is a Distribution Transformer?
A โdistribution transformerโ (also called a power distribution transformer) is a critical component of electrical grids, stepping down high-voltage electricity from power stations to safer, usable low-voltage levels for end-users. Common applications include โresidential buildings, factories, and rural infrastructure.
Tengyi Distribution Transformer Key Features:
- Energy efficiency
- Custom for different demands
- Durability for industrial or harsh environments
Types of Distribution Transformers: Choosing the Right One for Your Needs
Dry Type Distribution Transformerโ
Ideal for indoor installations such as hospitals, data centers, and urban areas where fire safety is critical. These transformers use no oil, reducing fire risks and maintenance requirements. Their energy-efficient design makes them suitable for environments like schools or office buildings.
โOverhead/Pole Mounted Transformerโ
Perfect for rural areas, temporary setups, and cost-effective outdoor power distribution. Lightweight and easy to install, they are widely used in agricultural regions or rural infrastructure projects.
โPad Mounted & Underground Transformersโ
Designed for urban infrastructure (parking lots, sidewalks) requiring flood resistance and noise reduction. Their compact, aesthetically pleasing design ensures they blend seamlessly into cityscapes while protecting against extreme weather conditions.
โSpecialized Typesโ
- โSubmersible Transformer: Used in water-intensive environments like fish farms or mining operations to deliver power underwater.
- โThree-Winding Transformer: Powers multiple voltage circuits simultaneously, making them ideal for industrial complexes requiring simultaneous low-, medium-, and high-voltage outputs.
- โAmorphous Transformer: Reduces energy loss in high-load scenarios such as data centers or manufacturing plants, thanks to the non-crystalline core material.
Distribution Transformer Specifications: Voltage, Capacity, and Phase
Voltage Ratingsโ
- โLow Voltage (LV): โ10kV/0.433V distribution transformersโ are standard for residential and small commercial use, stepping down power for homes and light commercial buildings.
- โMedium Voltage (MV): โ33kV/433V distribution transformersโ serve industrial facilities and power substations, efficiently managing medium-voltage power distribution.
โCapacity Rangeโ
- โSmall Capacity (10โ50 kVA): Ideal for rural grids, single-phase residential areas, and small businesses requiring minimal power.
- โMedium Capacity (100โ250 kVA): Fits medium-sized commercial buildings like offices, hotels, and retail spaces.
- โLarge Capacity (315โ500 kVA): Required for heavy industrial operations such as factories, hospitals, and data centers with continuous high-load demands.
โPhase Configurationโ
- โThree-Phase Transformer: Powers motors and equipment in industrial settings, ensuring stable operation for machinery.
- โSingle-Phase Transformer: Used in areas with predominantly single-phase loads, such as rural homes or temporary construction sites.
How to Choose a Distribution Transformer?
Consider Your Applicationโ
- For โresidential buildings, prioritize โlow voltage distribution transformersโ (e.g., โ10kVA distribution transformers) with noise-reduction features.
- In โindustrial facilities, select โhigh voltage distribution transformersโ and energy-efficient models like โamorphous core transformers.
โAssess Energy Efficiencyโ
Invest in โenergy efficient distribution transformersโ to reduce long-term operational costs, especially for high-load environments like data centers.
โMaintenance and Lifespanโ
Choose transformers with durable cores (distribution transformer core) and robust windings to minimize downtime and maintenance needs.
Detailed Distribution Transformer Guide: Voltage, Capacities, and Ideal Applications by Scenario
By Voltage Rating
10kV Distribution Transformer
- โApplication Scenarios:
- โUrban/Rural Power Grids: Step down 10kV to 0.4kV/0.22kV for residential areas, shops, and small factories.
- โIndustrial Plants: Supply power to low-voltage equipment (e.g., pumps, lighting, HVAC systems).
- โAgriculture: Irrigation systems, farm equipment, and rural substations.
- โTypical Capacities: 25kVAโ630kVA (depends on load density).
- โExamples:
- โ25kVA 10kV/0.4kV: Single-family homes, small clinics.
- โ315kVA 10kV/0.4kV: Shopping malls, community centers, medium-sized workshops.
11kV Distribution Transformer
- โApplication Scenarios:
- โIndustrial Parks: Power high-voltage motors (6kV/10kV), electric furnaces, and compressors.
- โCommercial Complexes: Supply power to elevators, escalators, and large HVAC systems.
- โMining/Oil Fields: Underground machinery, oil extraction pumps, and drilling rigs.
- โTypical Capacities: 100kVAโ2,500kVA (higher capacities for industrial use).
- โExamples:
- โ100kVA 11kV/0.4kV: Small processing plants, gas stations.
- โ250kVA 11kV/0.4kV: Medium-sized manufacturing facilities, data center UPS systems.
11kV 433V Distribution Transformer
- โApplication Scenarios:
- โSpecialized Industries: Equipment in Europe/regions using 433V (e.g., motors, compressors).
- โMaritime/Shipping: Shipboard power systems, port cranes, and offshore platforms.
- โRetrofit Projects: Upgrade legacy 433V systems in older urban areas.
- โTypical Capacities: 50kVAโ500kVA (match load requirements).
- โExamples:
- โ200kVA 11kV/433V: Chemical reactor motors, subway traction power systems.
By Capacity
25kVAโ50kVA
- โApplication Scenarios:
- โResidential: Single-family homes, villas, or apartment complexes.
- โSmall Businesses: Hair salons, cafes, printing shops.
- โAgriculture: Greenhouse lighting, small water pumps.
- โCommon Voltages: 10kV/0.4kV or 380V/0.22kV.
50kVAโ100kVA
- โApplication Scenarios:
- โCommercial Spaces: Stores, restaurants, supermarket refrigeration units.
- โOffice Buildings: Floor power panels, emergency lighting.
- โPublic Infrastructure: Streetlights, park billboards.
- โCommon Voltage: 10kV/0.4kV.
100kVAโ250kVA
- โApplication Scenarios:
- โMedium-Sized Factories: Production line motors, air compressors, packaging machines.
- โHospitals/Schools: Surgical rooms, classroom lighting, computer labs.
- โData Centers: Server racks (requires UPS integration).
- โCommon Voltages: 10kV/0.4kV or 11kV/0.4kV.
250kVAโ630kVA
- โApplication Scenarios:
- โHeavy Industry: Steel rolling mills, cement kilns, port gantry cranes.
- โLarge Commercial Complexes: Shopping malls, hotel HVAC systems.
- โRegional Substations: Power distribution hubs for multiple neighborhoods.
- โCommon Voltage: 10kV/0.4kV or 11kV/0.4kV.
Key Selection Guidelines
Voltage Matching:
- โ10kV: Ideal for end-of-line distribution in urban/rural grids (wide coverage but higher losses).
- 11kV: Better for short-distance, high-power industrial applications (reduces voltage drop).
Capacity Calculation:
- โFormula:ย Transformerย Capacityโฅ3โรVoltageย (kV)Totalย Loadย (kW)โร1.2ย (safety margin).
- โExample: For a 50kW three-phase load at 0.4kV:
1.732ร0.450,000โโ72kVAโChooseย 100kVA.
- โExample: For a 50kW three-phase load at 0.4kV:
Environmental Considerations:
- โOil-Immersed (ONAN): Outdoor use (e.g., farms, roads).
- Dry-Type (ODAF/OFAF): Indoor use (e.g., malls, hospitals) for fire safety.
Typical Use Cases
| โTransformer Specification | โApplication | โLoad Type |
| โ10kV/0.4kV 315kVA | Shopping mall | Central AC, store lighting, food prep |
| โ11kV/0.4kV 250kVA | Cement plant | Roller mill motors, dust collection |
| โ11kV/433V 200kVA | Chemical factory | Reactor motors, pump systems |
| โ10kV/0.4kV 100kVA | Community hospital | MRI machines, operating room lights |
โApplications of Distribution Transformers
Residential Buildingsโ rely on โsingle-phase pad mounted transformersโ (10โ250 kVA) to deliver stable, low-voltage power while minimizing noise for comfort.
Commercial Complexesโ often use โthree-phase overhead transformersโ (100โ500 kVA) to support high-load operations like lighting systems and HVAC equipment, prioritizing energy efficiency.
Industrial Facilitiesโ require โamorphous three-phase transformersโ (315โ500 kVA) to handle heavy machinery and power-intensive processes, with features like harmonic resistance and short-circuit withstand capability.
Rural Infrastructureโ benefits from โpole-mounted transformersโ (10โ50 kVA) due to their cost-effectiveness and weather resistance, making them ideal for areas with limited access to maintenance services.
| โScenarioโ | โRecommended Transformer Typeโ | โKey Considerationsโ |
| โResidential Buildingsโ | Single-phase pad mounted transformers (10โ250 kVA) | Noise control, low voltage output |
| โCommercial Complexesโ | Three-phase overhead transformers (100โ500 kVA) | High load capacity, energy efficiency |
| โIndustrial Facilitiesโ | Amorphous three-phase transformers (315โ500 kVA) | Harmonic resistance, short-circuit withstand |
| โRural Infrastructureโ | Pole-mounted transformers (10โ50 kVA) | Cost-effectiveness, weather resistance |
What Is A Three Winding Distribution Transformer?
A โthree-winding transformerย is a specialized power transformer featuring โthree independent windingsย (primary, secondary, and tertiary) designed for โmulti-voltage power systemsย or โcomplex load distribution scenarios. Compared to traditional dual-winding transformers, it offers greater flexibility in power supply but comes with higher structural complexity and cost.
Core Structure and Working Principle
โThree Independent Windings
Each winding connects to different voltage levels (e.g., 110kV/35kV/10kV):
- โPrimary winding: Inputs from the power grid or generator.
- โSecondary winding: Outputs for medium-voltage loads.
- โTertiary winding: Supplies low-voltage equipment or isolated circuits.
Voltage ratios between windings depend on the โturns ratio.
โCommon Connection Methods
Winding configurations use โstar (Y) or โdelta (ฮ) patterns, forming various โconnection groups (e.g., YNyn0, Yd11):
- โYNyn0:
- High-voltage and low-voltage windings in star (Y) configuration.
- Neutral points directly grounded.
- โYd11:
- High-voltage winding in star (Y), low-voltage in delta (ฮ).
- 30ยฐ phase shift between windings for harmonic suppression.
Main Application Scenarios
Power System Hubs
- โPower Plants:
- Step up generator output (e.g., 10kV) to transmission voltages (e.g., 220kV/500kV).
- Simultaneously power plant auxiliary equipment (e.g., lighting, control systems) at low voltage (e.g., 400V).
- โRegional Substations:
- Interface between transmission (e.g., 220kV), distribution (e.g., 110kV), and local networks (e.g., 35kV).
Industrial Distribution
- โLarge Factories:
- Supply high-voltage motors (e.g., 6kV) and low-voltage control systems (e.g., 380V).
- Isolate factory internal grids from external supplies.
- โData Centers:
- Provide multi-voltage backups (e.g., 400V/230V) for redundancy.
โSpecialized Applications
- โRailway Systems:
- Isolate traction power (e.g., 27.5kV) from station loads (e.g., 10kV).
- โOffshore Platforms:
- Integrate platform internal power (e.g., 440V) with land-based transmission (e.g., 110kV).
Advantages and Challenges
| โAdvantage | โChallenge |
|---|---|
| โMulti-functional: Supports multiple voltage conversions and loads. | โComplex Structure: Higher manufacturing costs due to multiple windings and core design. |
| โHigh Reliability: Electrical isolation between windings prevents cascading failures. | โMaintenance: Requires advanced protection systems (e.g., differential relays). |
| โEnergy Efficiency: Ideal for dense multi-voltage grids. | โLower Efficiency: Increased no-load losses due to inter-winding flux leakage. |
Why Choose Tengyi?
At Tengyi, we provide:
- โCompetitive pricing.
- โHigh-quality distribution transformersโ for all applications.
- โTailor-made service. Request bespoke voltage, capacity, and phase configurations to meet unique project requirements.
Contact us todayโ to request a โdistribution transformer quoteโ or learn more about our โpower distribution transformer manufacturers!
Quote Tengyi Transformer
We offer custom-designed products with varying voltage levels to meet the requirements of different national power grids and provide OEM services.
Your main parameters of the transformer (voltage, capacity, loss and others)?
Your transformer operating environment (altitude, temperature, humidity, location, etc.)?
Other customized requirements (tap changer, color, oil pillow, etc.)?
Minimum order quantity: 1 unit
