SC(B) Series Epoxy Resin Cast Dry-Type Transformer

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  • SC(B) Series Epoxy Resin Cast Dry-Type Transformer

SC(B) Series Epoxy Resin Cast Dry-Type Transformer

SC(B) Series Epoxy Resin Cast Dry-Type Transformer is designed for safe, reliable, and low-maintenance indoor power distribution applications. It is suitable for projects requiring high fire safety, environmental protection, and stable electrical performance.

The transformer adopts vacuum epoxy resin casting technology for high and low voltage windings, forming a solid insulation structure with high mechanical strength and resistance to moisture, dust, and pollution.

As a type of Dry Type Transformer, the SC(B) Series does not use insulating oil, eliminating oil leakage risks and reducing maintenance requirements compared with oil immersed transformers. This Cast Resin Dry Type Transformer is widely used in indoor substations, commercial buildings, industrial facilities, infrastructure projects, and other applications where safety and reliability are critical.

The product can be customized according to project requirements, including capacity, voltage level, winding material, insulation class, cooling method, protection enclosure, monitoring system, and electrical parameters.

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  • Product Details
  • FAQ
Parameter Standard
 Optional Range
Product Type
SC(B) Series Epoxy Resin Cast Dry‑Type Transformer
Rated Capacity
10KVA‑6300KVA
Voltage Level
6KV‑35KV
Winding Conductor
Copper or Aluminum
Insulation Class
F Class or H Class
Partial Discharge
≤5 pC under agreed test conditions
Cooling Method
AN; AF with fan control system optional
Protection Enclosure
IP20 or IP23
Temperature Monitoring
Digital temperature controller, PT100 sensor, alarm/trip function, automatic fan control
Efficiency Series
SCB10 / SCB11 / SCB12 / SCB13 / SCB14 / SCB18
Design Standard
IEC, GB, or customer/project technical specifications

1. What is the difference between SC(B) Series Epoxy Resin Cast Dry-Type Transformer and oil immersed transformers?
The SC(B) Series Epoxy Resin Cast Dry-Type Transformer uses solid epoxy resin insulation and does not contain insulating oil.
This design eliminates oil leakage risks and reduces maintenance related to oil sampling, filtration, and replacement.
Oil immersed transformers may still be preferred for certain outdoor, grid, or higher-capacity applications depending on project requirements.

2. Where can SC(B) Series Epoxy Resin Cast Dry-Type Transformers be used?
The product is suitable for indoor commercial, industrial, and infrastructure applications.
For environments with high humidity, dust, pollution, high temperature, high altitude, salt fog, or outdoor exposure, enclosure, cooling, and protection requirements should be confirmed before selection.

3. What does partial discharge ≤5 pC mean?
Partial discharge refers to localized electrical discharge occurring inside or around insulation materials.
A low partial discharge value under agreed testing conditions is an important indicator for evaluating insulation quality and manufacturing consistency.

4. Can AF forced air cooling permanently increase transformer capacity?
AF forced air cooling improves heat dissipation capability.
However, allowable load level and operating duration depend on transformer design, environmental conditions, and temperature limits.

5. What maintenance is required for a Cast Resin Dry Type Transformer?
Routine maintenance mainly includes:
Cleaning ventilation passages and winding surfaces
Checking electrical connections and grounding
Inspecting fans and temperature sensors
Reviewing temperature records
Performing electrical inspections according to site requirements
No oil sampling or oil replacement is required.

6. How are high temperature and high altitude projects handled?
High altitude and temperature conditions are important design inputs.
Engineering evaluation may require adjustments to insulation distance, cooling capacity, temperature rise limits, and enclosure ventilation according to actual installation conditions.

  • Product Features

Reliable Epoxy Resin Cast Insulation Structure
The Epoxy Resin Cast Transformer uses vacuum epoxy resin casting technology to form a rigid insulation system for high and low voltage windings.
The casting process reduces internal air gaps and improves resistance to moisture, dust, and pollution. The integrated cast resin winding structure also provides strong mechanical support under short-circuit conditions.
Partial discharge performance of ≤5 pC under agreed testing conditions provides a measurable indicator for insulation quality evaluation.

Oil-Free Design with Lower Maintenance Requirements
Unlike oil immersed transformers, the Dry Type Transformer does not contain insulating oil, eliminating oil sampling, oil filtration, and leakage management.
The oil-free structure reduces maintenance requirements and is suitable for hospitals, data centers, high-rise buildings, transportation facilities, and other projects where maintenance access is limited.

Flexible Cooling and Temperature Monitoring
The SC(B) Series supports AN air natural cooling under normal operating conditions.
For applications requiring higher heat dissipation capability, AF forced air cooling with temperature-controlled fans can be configured.

Optional monitoring solutions include:
Digital temperature controller
PT100 temperature sensor
Alarm and trip functions
Automatic fan control system
These configurations improve operational monitoring and system reliability.
The transformer adopts optimized magnetic circuit design and high-quality silicon steel sheets to reduce no-load loss and load loss.
Different efficiency series including SCB10, SCB11, SCB12, SCB13, SCB14, and SCB18 are available according to project requirements.
Flexible Configuration for Different Projects

The Cast Resin Dry Type Transformer can be customized according to application requirements, including:
Copper or aluminum windings
F Class or H Class insulation
AN or AF cooling
IP20 or IP23 protection enclosure
Temperature monitoring systems
Customized electrical parameters

  • Application Fields
Application Area
Typical Applications
Industries Served
Commercial Buildings & Public Facilities
Hospitals, schools, high-rise buildings, hotels, data centers, indoor substations
Building contractors, electrical contractors, project developers
Industrial Facilities
Manufacturing plants, industrial parks, petrochemical facilities, factory power systems
Industrial companies, EPC contractors, electrical system integrators
Infrastructure Projects
Airports, rail transit systems, transportation facilities, municipal projects
Infrastructure contractors, engineering companies
Renewable Energy Systems
Solar power projects, wind power projects, auxiliary power supply systems
Renewable energy developers, EPC companies
Electrical Equipment Integration
Switchgear assemblies, box substations, integrated power distribution systems
Switchgear manufacturers, OEM suppliers, system integrators
  • OEM·ODM
Jiangsu Xinxin Electric provides OEM, ODM, and project customization services for distributors, switchgear manufacturers, EPC contractors, and equipment integrators.
Customized Cast Resin Dry Type Transformer solutions are developed according to approved technical specifications, drawings, and project requirements.
Customization Module Available Options Electrical Design Capacity, voltage ratio, frequency, vector group, impedance, tap range, loss level, temperature rise
Mechanical Design Dimensions, terminal direction, cable entry, busbar connection, wheels, lifting points, anti-vibration base
Materials & Accessories Copper/aluminum windings, insulation class, sensors, temperature controller, fans, alarm/trip contacts
Market Adaptation OEM brand, nameplate, language, labels, manuals, drawing templates, packaging marks
System Integration Medium/low voltage switchgear, box substations, busbars, protection and monitoring systems
Documentation Support Technical submission documents, assembly drawings, electrical drawings, inspection records
  • Why Choose Us

Complete Transformer Product Capability
Jiangsu Xinxin Electric provides transformer solutions covering:
Cast Resin Dry Type Transformers
Dry Type Transformers
Oil Immersed Transformers
Box substations
Related power distribution equipment
This allows EPC contractors, OEM customers, distributors, and system integrators to coordinate multiple equipment requirements through one supplier.

Manufacturing & Quality Control
Production is managed through controlled manufacturing and inspection processes, including:
Technical review
Incoming material inspection
Winding manufacturing
Vacuum casting and curing process control
Assembly inspection
Electrical routine testing
Final document approval
Key materials including conductors, silicon steel sheets, epoxy resin insulation materials, and purchased components are inspected according to technical requirements.

Quality control focuses on:
Winding dimensions and connections
Casting process parameters
Curing records
Assembly accuracy
Electrical performance verification
Final product inspection
Engineering Support & International Projects
Jiangsu Xinxin Electric supports international projects with technical documents prepared according to IEC, GB, or customer-specific requirements.

Available documents include:
Technical data sheets
Assembly drawings
Wiring diagrams
Nameplates
Test reports
Packing documents
Project submission files
The company can coordinate requirements related to voltage systems, installation conditions, documentation, packaging, and delivery.

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About Xinxin Electric

Xinxin Electric operates a 30,000 m2 manufacturing facility and specializes in transformers and prefabricated substations. With a commitment to quality and integrity, we provide equipment and technical support for power projects worldwide.
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  • 2026/08.25 Exhibitions

    Jiangsu XinXin Electric Co., Ltd. Shines at the 2025 Indonesia International Power Exhibition—Showcasing China's Smart Manufacturing Power and Supporting Indonesia's Green Energy Transition

    From September 17 to 20, 2025, Mr. Zhan Chungen, Chairman of Jiangsu XinXin Electric Co., Ltd., along with Sales General Manager Mr. Wang Hua and their team, attended the "Electric & Power Indonesia 2025," the International Exhibition on Power Generation, Renewable Energy, and Electrical Equipment held in Jakarta, Indonesia. This year’s event focused on upgrading Southeast Asia’s power infrastructure and advancing renewable energy development. This exhibition highlights our company's latest Energy‑efficient transformer series These products include the S14‑M, S20‑M, and S22‑M series oil‑immersed power transformers, as well as the SCB14 and SCB18 series dry‑type transformers, among others. XinXin Electric's transformer products feature High protection level and excellent thermal design, capable of adapting to Indonesia's hot and humid environmental conditions. Several Indonesian power industry experts made a special trip to the XinXin Electric booth to engage in in‑depth technical exchanges and discuss potential collaborations. This year's exhibition holds significant strategic importance for XinXin Electric in expanding into the Southeast Asian market. Indonesia, as the largest economy in Southeast Asia, is actively promoting a transformation of its energy structure. Chairman Zhan Chungen stated during the exhibition: " Southeast Asia is a key component of our globalization strategy. "We will contribute China's strength to Indonesia's power development, leveraging advanced technology and reliable product quality." Xinxin Electric also plans to leverage this exhibition to connect with power equipment importers, distributors, and agents from Indonesia and Southeast Asia, discussing new business opportunities in this rapidly growing industry. Leveraging this exhibition, XinXin Electric has further expanded its brand presence in the Southeast Asian market, laying a solid foundation for deeper penetration into the local market in the future.
  • 2026/08.25 Company News

    Deepening School‑Enterprise Cooperation to Cultivate Industrial Talents — Jiangsu XinXin Electric Co., Ltd. Receives Visiting Leaders from Nanjing University

    Jiangsu XinXin Electric Co., Ltd. (hereinafter referred to as "XinXin Electric") has always attached great importance to industry‑university‑research collaborative innovation, as well as the recruitment and cultivation of high‑quality talents. On June 12, the company was honored to receive a delegation from Nanjing University, led by Professor Zhu Songqing, Member of the Standing Committee and Vice‑President of the University Party Committee. Both sides held fruitful exchanges on deepening school‑enterprise cooperation and advancing the integration of production and education. During the on‑site exchange, Mr. Zhan Chungen, Executive Director of XinXin Electric, gave the delegation led by Vice‑President Zhu Songqing a detailed introduction to the company’s development history, core business layout, advanced production processes, and technological strengths in the R&D and manufacturing of new‑energy electrical equipment. Mr. Zhan highlighted the company’s urgent demand for and long‑term planning of university talents. He expressed sincere expectations for further in‑depth and extensive substantive cooperation with Nanjing University in key areas, including close school‑enterprise integration, joint construction of high‑level internship and training bases, and joint incubation of innovation and entrepreneurship projects. Mr. Zhan stated that XinXin Electric’s development relies on innovation and talent support. Universities serve as an important source of talent and innovation, promising broad prospects for bilateral cooperation. After the briefing, Vice‑President Zhu Songqing spoke highly of XinXin Electric’s industry standing and achievements. He introduced Nanjing University’s disciplinary features, industry‑university‑research cooperation foundation, as well as student employment and entrepreneurship work. Vice‑President Zhu noted that the university will give full play to its disciplinary advantages and industry influence, integrate scientific research and talent resources with industrial resources, and align them with XinXin Electric’s technical strengths to jointly build a high‑level platform for talent training and innovative practice. He emphasized that this initiative aims to implement the integrated development strategy of education, science & technology and talent, so as to boost the sound development of the local economy and society. Vice‑President Zhu’s positive response has boosted XinXin Electric’s confidence in future cooperation. This high‑level exchange marks an important step for XinXin Electric to deepen its strategic partnership with universities. The company firmly believes that close cooperation with Nanjing University will effectively expand talent recruitment channels, optimize its talent structure, accelerate the transformation of scientific and technological achievements, and enhance its core competitiveness. It will also contribute “XinXin” strength to local industrial upgrading and economic growth. XinXin Electric will keep seizing opportunities and looks forward to conducting pragmatic multi‑dimensional and in‑depth cooperation with universities, jointly opening a new chapter for win‑win school‑enterprise collaboration.
  • 2026/08.25 Industry News

    How to Install the Transformer

    1. Construction Prerequisites (1) Drawings shall be reviewed, and detailed operating instructions shall be prepared and approved in accordance with the manufacturer’s technical data. (2) Construction quality for works related to box‑type transformer installation shall comply with current national codes for construction and acceptance of building works. (3) Positions of embedded parts and pre‑buried cable conduits shall satisfy design requirements, and all embedded parts shall be securely fixed. 2. Construction Preparation 2.1 Transformer Foundation Inspection (1) Inspect the construction quality of the transformer foundation and fill in the inspection record sheet. The record shall be signed and confirmed by all relevant parties. Any defects found shall be reported and rectified promptly. (2) Carefully verify the horizontal and longitudinal axis dimensions of the transformer foundation as well as the positions of pre‑buried conduits, and cross‑check against drawing dimensions. Proceed with subsequent work only after all dimensions are confirmed correct. 2.2 Transformer Unpacking Inspection (1) Upon arrival, the transformer shall be unpacked and inspected jointly by representatives of the owner, supervisor and manufacturer. (2) Measure and record the reading of the shock recorder before unloading; the impact value shall be less than 3G. (3) Inspect the transformer exterior for damage and confirm complete paint finish, and keep relevant records. (4) Check internal components of the transformer for displacement, contamination and other abnormalities. 3. Transformer Positioning & Installation (1) Mount the channel‑steel foundation onto embedded parts. Perform levelling and alignment. Weld the channel‑steel foundation firmly to embedded parts. Remove welding slag from welds and apply anti‑corrosive paint. (2) After hoisting the fan unit, hoist the transformer directly onto the foundation, then use jacks for levelling and alignment. (3) Connect the transformer to the foundation following the fixing method (bolted connection or welding) specified by the manufacturer. (4) In case of split delivery, install the enclosure after the transformer is positioned and oriented. (5) Affix nameplates and clean the interior of the transformer cabinet. (6) Implement finished‑product protection prior to commencing subsequent procedures.
  • 2026/08.25 Industry News

    Do Dry‑Type Transformers Need to Be De‑energized?

    Dry‑type transformers are widely applied for local lighting, high‑rise buildings, airports, wharves, CNC machinery and other facilities. Simply put, a dry‑type transformer is a transformer whose core and windings are not immersed in insulating oil. Under what conditions shall a dry‑type transformer be immediately de‑energized? Fire occurs on the dry‑type transformer; the unit must be shut down immediately. Severe damage or discharge phenomena are observed on the transformer bushing. Stop operation immediately and arrange inspection by qualified professionals. Heavy smoke is emitted from the transformer. Abnormal, loud internal noise accompanied by explosion‑like sounds inside the transformer. Immediate shutdown is mandatory to prevent hazardous accidents. Abnormally high and continuously rising temperature under normal load and cooling conditions. When any of the above‑mentioned symptoms appear, the dry‑type transformer must be de‑energized right away. Continuing operation under such faults may cause personal injury as well as permanent damage to the transformer. These issues shall be addressed promptly. Exercise great caution when encountering any of the above‑mentioned conditions to avoid hazards. Yizheng Hongxin Transformer Co., Ltd. specializes in transformers, including dry‑type transformers, power transformers and oil‑immersed transformers. As a transformer manufacturer based in Jiangsu Province, our plant produces dry‑type transformers, power transformers and oil‑immersed transformers. The company is situated in the Economic Development Zone of Yizheng City, Jiangsu Province, within the Yangtze River Delta. It lies at the geographic heart of the Nanjing‑Zhenjiang‑Yangzhou Silver Triangle region. To its west is Nanjing, to its east Yangzhou; it borders the Yangtze River in the south and faces Zhenjiang across the river. Close to the Nantong‑Nanjing Expressway, it enjoys distinctly advantageous geographic conditions. Boasting years of experience in power transformer design and manufacturing, the company is equipped with advanced production facilities and mature manufacturing techniques. We deliver reliable‑quality products and maintain a solid market reputation. We look forward to cooperating with customers for mutual development and shared success!
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