I. Overview
The epoxy resin cast Dry-type Transformer material is of high quality and scientifically formulated, produced using advanced production and testing equipment according to strict processes. The product features high reliability and long service life. Depending on different usage environments, it can be equipped with enclosures of varying protection levels or not equipped with an enclosure. It can serve as an updated replacement for Oil-Immersed Transformers and is suitable for important or special environmental locations such as high-rise buildings, commercial centers, airports, tunnels, chemical plants, nuclear power stations, ships, and more.
II. Execution standard
GB1094.11-2007 Dry-type power transformer
GB/T10228-2008 Technical Parameters and Requirements for Dry-type Power Transformers
GBT17211-1998 Loading Guide for Dry-type Power Transformers
GB1094.3-2003 Power Transformers - Part 3: Insulation Levels, Dielectric Tests and External Clearances in Air
JB/T10088-2004 Sound Level of 6~500kV Transformers
JB/T56009-1998 Quality Grading of Dry-type Power Transformers
| Model | Material | Size |
| S11/S13 | Copper/Aluminum | 230*150*230cm |
III. Performance characteristics
Compared to the SCB9 model, this series of transformers exhibit lower no-load loss, no-load current, and noise.
Safe, fire-resistant, and pollution-free, it can be directly operated in the load center.
It has high mechanical strength, strong short-circuit resistance, low partial discharge, good thermal stability, high reliability, and long service life.
It has good heat dissipation performance and strong overload capacity, and can increase capacity operation when using forced air cooling.
It has good moisture resistance and is suitable for operation in high humidity and other harsh environments.
It can be equipped with a comprehensive temperature monitoring and protection system. Utilizing an intelligent signal temperature control system, it can automatically monitor and display the working temperature of each of the three-phase windings on the same screen, automatically start and stop the fan, and has functions such as alarming and tripping.
Small size, light weight, small footprint, and low installation cost.
IV. Structural characteristics
The iron core material is made of high-quality cold-rolled oriented silicon steel sheets, featuring a fully scarf joint laminated structure.
The low-voltage coil adopts a foil winding structure, wound with high-quality copper foil, while the high-voltage coil features a layered structure, molded with vacuum epoxy resin.
At Jihui Electric Group Co., Ltd., we specialize in the research, development, manufacturing, and service of medium and low voltage power transmission and distribution equipment up to 35kV. Among our transformer solutions, the 800kVA 10/0.4KV customized epoxy resin Dry-type Transformer is designed for industrial power distribution systems that require stable operation, strong insulation performance, and long-term reliability.
As modern industries continue to increase their demand for safe and efficient electricity, transformers must provide more than simple voltage conversion. They need to operate safely in factories, substations, commercial buildings, renewable energy projects, and other complex environments. The 800kVA dry-type transformer meets these requirements by combining advanced epoxy resin insulation technology with reliable electrical design.
The transformer converts 10kV medium voltage electricity into 0.4kV low voltage power for end-use equipment. With a rated capacity of 800kVA, it is suitable for medium-sized electrical distribution applications where stable power supply, low maintenance, and environmental safety are important considerations.
Compared with traditional oil-filled transformers, the epoxy resin dry type transformer uses solid insulation materials instead of liquid insulation oil. This design reduces the risk of oil leakage, improves fire safety, and allows easier installation in indoor electrical rooms, industrial facilities, and urban infrastructure projects.
An 800kVA 10/0.4KV customized epoxy resin dry-type transformer is a three-phase electrical transformer designed to reduce medium voltage electricity from 10kV to 0.4kV. It transfers electrical energy through electromagnetic induction and supplies stable power to industrial equipment, distribution panels, automation systems, and commercial electrical loads.
The transformer mainly consists of the following components:
Iron core: Provides an efficient magnetic path for energy transfer and helps reduce power loss.
High voltage winding: Receives the 10kV input voltage from the medium voltage network.
Low voltage winding: Outputs 0.4kV power for electrical equipment.
Epoxy resin insulation system: Protects windings and improves electrical safety.
Cooling structure: Helps control operating temperature during continuous operation.
The 800kVA capacity means that the transformer can continuously handle an apparent power load of 800 kilovolt-amperes under designed operating conditions. The actual application capacity depends on load characteristics, operating environment, and system design.
As a customized transformer product, the design can be adjusted according to project requirements, including voltage level, protection grade, installation method, cooling type, and specific operating conditions.
The working principle of the 800kVA 10/0.4KV dry type transformer is based on electromagnetic induction. When alternating current enters the primary winding, it creates a changing magnetic field inside the transformer core. This magnetic field transfers energy to the secondary winding and produces a different voltage level.
The transformer does not directly connect the high voltage and low voltage circuits. Instead, electrical energy is transferred through the magnetic field, which provides electrical isolation and improves system safety.
The transformer receives electricity from a 10kV distribution network through the high voltage side. The incoming voltage is applied to the primary winding to create magnetic flux inside the core.
The iron core acts as a magnetic channel that improves energy transfer efficiency. High-quality core materials help reduce energy loss and maintain stable operation.
Through the winding ratio between the high voltage side and low voltage side, the transformer reduces 10kV electricity to 0.4kV output voltage suitable for electrical equipment.
The converted electricity is supplied to distribution systems, motors, production equipment, lighting systems, and other low voltage loads.
The performance of a transformer depends on design quality, insulation technology, manufacturing accuracy, and application suitability. The following features make the 800kVA three phase dry type transformer suitable for various industrial and commercial power systems.
Epoxy resin insulation is one of the key technologies used in modern dry-type transformers. The solid insulation structure provides strong electrical insulation, mechanical strength, and resistance to environmental influence.
Compared with oil insulation systems, epoxy resin insulation requires less maintenance and provides stable performance during long-term operation.
One important advantage of dry-type transformers is the absence of insulating oil. This reduces the risk associated with oil leakage and improves safety in locations with strict fire protection requirements.
For applications such as factories, hospitals, commercial buildings, and underground facilities, fire safety is often an important factor when selecting transformer equipment.
The Medium Voltage Dry Type Transformer requires less routine maintenance compared with oil-filled transformer designs. There is no need for oil replacement or oil leakage inspection.
This helps reduce operating costs and improves the convenience of long-term equipment management.
A reliable transformer must maintain stable voltage output under different load conditions. The optimized winding design and insulation structure help improve voltage stability and operational reliability.
This is especially important for industrial users where unstable power supply may affect production efficiency and equipment performance.
Different projects have different requirements. A customized epoxy resin dry-type transformer can be designed according to:
Rated capacity requirements
Input and output voltage specifications
Installation space limitations
Environmental conditions
Protection requirements
Special customer standards
The following parameters represent common specifications for an 800kVA 10/0.4KV customized epoxy resin dry-type transformer. Actual specifications may vary according to project requirements.
| Parameter | Typical Specification | Application Value |
|---|---|---|
| Rated Capacity | 800kVA | Suitable for medium power distribution applications |
| High Voltage | 10kV | Connected with medium voltage distribution network |
| Low Voltage | 0.4kV | Provides power for industrial and commercial loads |
| Transformer Type | Three-phase epoxy resin dry-type transformer | Provides safe and reliable voltage conversion |
| Insulation Material | Epoxy resin | Improves insulation strength and environmental resistance |
| Cooling Method | Natural air cooling / Forced air cooling | Controls temperature during operation |
Source: Technical information is based on common industrial transformer design practices and medium voltage distribution system requirements.
| Comparison Item | Epoxy Resin Dry-type Transformer | Oil-filled Transformer |
|---|---|---|
| Insulation Method | Solid epoxy resin insulation | Liquid oil insulation |
| Fire Safety | Higher safety due to oil-free design | Requires additional fire protection measures |
| Maintenance | Lower maintenance requirements | Requires oil inspection and maintenance |
| Installation Location | Suitable for indoor electrical rooms and buildings | Commonly installed outdoors or dedicated transformer rooms |
| Environmental Impact | No oil leakage risk | Requires oil management |
Source: Comparison based on general transformer engineering characteristics and industrial application experience.
For industrial power distribution projects, transformer selection directly affects system safety, energy efficiency, and operating reliability. The 800kVA 10/0.4KV customized epoxy resin dry-type transformer provides several practical advantages:
Reliable 10kV to 0.4kV voltage conversion.
Strong insulation performance for long-term operation.
Lower maintenance requirements compared with oil-filled designs.
Suitable for indoor and environmentally sensitive applications.
Flexible customization for different engineering projects.
Stable operation under continuous industrial loads.
A transformer is not only a voltage conversion device; it is an important part of the entire power distribution system. Selecting an unsuitable transformer may lead to problems such as insufficient capacity, overheating, increased energy loss, or reduced equipment life.
When selecting an 800kVA 10/0.4KV customized epoxy resin dry-type transformer, engineers normally consider:
Total electrical load requirements
Future expansion possibility
Installation environment
Voltage system compatibility
Maintenance requirements
Safety standards
A properly designed transformer provides stable power supply and supports efficient operation of the complete electrical system.
The 800kVA 10/0.4KV customized epoxy resin dry-type transformer is widely used in power distribution systems where stable electricity supply, high safety, and reliable operation are required. With its compact structure, strong insulation performance, and low maintenance characteristics, this transformer is suitable for many industrial and infrastructure applications.
Different industries have different power requirements. Some applications need continuous operation for production, while others focus on safety, environmental protection, or limited installation space. The customized design of an epoxy resin dry-type transformer allows it to meet various project conditions.
Industrial manufacturing facilities are one of the most common application areas for 800kVA dry-type transformers. Modern factories require stable power for production lines, motors, automation systems, and processing equipment.
In manufacturing environments, unexpected power interruptions may affect production efficiency and increase operating costs. A reliable transformer provides stable low voltage power after converting electricity from the medium voltage network.
Typical applications include:
Automotive manufacturing plants
Electronic production facilities
Machinery factories
Food processing plants
Industrial automation systems
Metal processing workshops
The growth of renewable energy systems has increased the demand for reliable transformer solutions. Solar power plants, wind energy projects, and energy storage systems require transformers to connect generation equipment with electrical distribution networks.
The 10/0.4kV dry type transformer can be used in renewable energy facilities to provide safe voltage conversion and stable auxiliary power supply.
Because dry-type transformers do not use liquid insulation oil, they are suitable for projects where environmental safety and reduced maintenance are important considerations.
Commercial buildings require reliable electricity for lighting, elevators, HVAC systems, security systems, and building automation equipment.
The oil-free design of an epoxy resin dry-type transformer makes it suitable for locations with strict safety requirements, including:
Hospitals
Shopping centers
Office buildings
Hotels
Schools
Public transportation facilities
In medium voltage distribution systems, transformers act as a connection between the utility network and end-user electrical equipment.
The 800kVA three phase dry type transformer is commonly installed in substations to provide reliable power conversion for industrial parks, commercial areas, and infrastructure projects.
Mining, chemical processing, and heavy industries often require electrical equipment that can operate under demanding conditions.
These environments may involve dust, vibration, temperature variation, and long working hours. A properly designed customized epoxy resin dry-type transformer provides reliable performance while reducing maintenance requirements.
| Application Industry | Typical Equipment | Main Transformer Requirement |
|---|---|---|
| Industrial Manufacturing | Production lines, motors, automation equipment | Stable voltage supply and continuous operation |
| Renewable Energy | Solar systems, wind power, energy storage | Reliable conversion and environmental adaptability |
| Commercial Buildings | Lighting, HVAC, building systems | High safety and low maintenance |
| Infrastructure | Railway, transportation, public facilities | Long service life and reliable operation |
| Heavy Industry | Mining and chemical equipment | Strong mechanical and environmental resistance |
Source: Application data is summarized from common industrial power distribution practices and transformer installation experience.
The manufacturing quality of a transformer directly affects electrical performance, safety, and service life. The production of an 800kVA epoxy resin dry type transformer involves multiple controlled processes, including design analysis, material preparation, winding production, insulation treatment, assembly, and testing.
Before manufacturing begins, technical parameters are confirmed according to customer requirements and project conditions.
Important design factors include:
Rated capacity
Voltage ratio
Frequency requirements
Installation environment
Cooling method
Protection requirements
Professional design ensures that the transformer can operate efficiently under the expected working conditions.
The iron core is an important part of transformer energy conversion. It provides a magnetic path and directly affects transformer efficiency and operating temperature.
High-quality core materials help reduce magnetic loss and improve overall energy efficiency.
The winding process requires high precision because coil structure directly affects electrical performance.
During production, attention is given to:
Winding accuracy
Conductor arrangement
Insulation distance
Mechanical strength
A stable winding structure helps maintain reliable voltage conversion and improves resistance to electrical and mechanical stress.
The epoxy resin casting process is one of the key characteristics of modern dry-type transformers.
The resin insulation surrounds the winding structure and provides:
Excellent electrical insulation
Moisture resistance
Mechanical protection
Improved environmental adaptability
This technology allows transformers to operate reliably in indoor environments and locations requiring higher safety levels.
After completing mechanical assembly, each transformer undergoes performance inspection before delivery.
Common testing procedures include:
Insulation resistance testing
Voltage ratio testing
Winding resistance testing
Temperature rise testing
Load performance testing
Appearance inspection
Quality control is an important part of transformer manufacturing. A reliable transformer requires strict management throughout the production process, from raw materials to final inspection.
| Quality Control Stage | Main Inspection Content | Purpose |
|---|---|---|
| Material Inspection | Core, conductor, insulation materials | Ensure component reliability |
| Manufacturing Inspection | Winding, assembly, insulation process | Maintain product consistency |
| Electrical Testing | Voltage, insulation, performance testing | Confirm electrical safety |
| Final Inspection | Complete transformer condition | Ensure delivery quality |
Source: Quality control process is based on transformer manufacturing practices and ISO9001 quality management principles.
Jihui Electric Group Co., Ltd. is a high-tech enterprise specializing in the research, development, manufacturing, sales, and service of medium and low voltage power transmission and distribution equipment up to 35kV.
The company provides a complete range of electrical products, including Cable accessories, Cable distribution boxes, ring main units, Prefabricated Substations, combination transformers, SF6 load switches, and Vacuum circuit breakers.
With experience in medium and low voltage electrical equipment manufacturing, Jihui Electric understands the practical requirements of industrial power distribution projects, including reliability, safety, delivery control, and customized design.
For different projects, transformer selection involves many technical factors. Professional support helps customers select suitable capacity, voltage levels, and installation solutions.
The service process can include:
Technical parameter confirmation
Product configuration discussion
Manufacturing arrangement
Factory testing
Export delivery support
Jihui Electric operates according to internationally recognized management standards, including:
ISO9001 Quality Management System Certification
ISO14001 Environmental Management System Certification
ISO45001 Occupational Health and Safety Management System Certification
These systems support stable production, environmental responsibility, and safe manufacturing processes.
It is mainly used for medium voltage to low voltage power conversion in factories, commercial buildings, substations, renewable energy projects, and industrial facilities.
Epoxy resin provides strong electrical insulation, mechanical protection, moisture resistance, and improved safety compared with liquid insulation systems.
Yes. Parameters such as voltage ratio, enclosure design, cooling method, protection level, and installation requirements can be customized according to project needs.
Customers normally need to provide voltage level, rated capacity, application environment, installation conditions, frequency requirements, and special technical standards.
Transformers are usually protected with professional packaging methods to prevent moisture, vibration, and impact during transportation. Installation should follow electrical engineering requirements and project specifications.
The 800kVA 10/0.4KV customized epoxy resin dry-type transformer provides a safe, reliable, and efficient solution for medium voltage power distribution. With advanced insulation technology, stable electrical performance, and flexible customization capability, it supports various industrial and infrastructure applications.
For factories, renewable energy projects, commercial facilities, and power distribution systems, selecting a suitable dry-type transformer helps improve electrical safety, reduce maintenance requirements, and ensure long-term operational reliability.
A properly designed and manufactured 800kVA epoxy resin dry type transformer is not only a voltage conversion device but also an important part of a safe and efficient power distribution system.
JiHui Electric Group Co., Ltd , high-end website construction, foreign trade website construction, marketing website construction, website optimization, development websites, corporate network marketing, search engine promotion, wechat mini program, corporate mailbox, short video operation, etc.
No. 161 Jingliu Road, Yueqing Economic Development Zone, Yueqing City, Zhejiang Province, China
jh.power@jihuielec.com
+86 18967711966
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