Dry Core Transformer

Zhejiang Jiangshan Hengli Electrical Co., Ltd. is one of the leading manufacturers and suppliers of dry core transformer in China. If you're going to wholesale durable dry core transformer made in China, welcome to get pricelist from our factory. All customized products are with high quality and low price.

A dry core transformer is used to transfer electrical energy between voltage levels without relying on liquid insulation or cooling oil. It is a practical option for electrical installations where fire protection, indoor installation conditions, and routine maintenance requirements are important considerations.

Zhejiang Hengli Electrical manufactures dry-type power transformers for commercial facilities, industrial plants, and infrastructure projects. Depending on the required design, the transformer can use cast-resin insulation or another suitable dry-type insulation structure. The final configuration is selected according to the rated load, operating environment, installation space, and applicable electrical standards.

For overseas buyers, selecting a transformer involves more than matching the rated capacity. Insulation class, temperature rise, cooling method, voltage ratio, and site conditions must also be considered before confirming the technical specification.

The following are typical configuration items for project evaluation. Final ratings depend on the selected model and confirmed design.

Buyers should confirm the required voltage ratio, vector group, impedance, insulation level, temperature rise, enclosure protection rating, and installation conditions before requesting a quotation.

Dry core distribution transformer
Rated Power: Up to 5000kVA
Primary Voltage: Up to 35kV

Standard accessories (bushings, conservator optional, thermometer, etc.)
Test reports and technical documentation

We provide tailored transformer solutions based on your project:
Voltage ratio customization (HV/LV)
Copper or aluminum winding options
Special loss requirements
Tap changer (off-load / on-load)
Anti-corrosion or special environmental design
Compact or lightweight structure

A dry core transformer generally consists of a magnetic core, primary and secondary windings, insulation components, supporting structures, and cooling arrangements. Depending on the design, protective enclosures, temperature monitoring devices, and terminal connections can also be specified.

No insulating oil

The absence of liquid insulation eliminates oil leakage risks and the need for oil sampling, filtration, and replacement associated with oil-immersed transformers.

Suitable for indoor installations

Dry-type designs are often considered for buildings and facilities where oil containment is undesirable. Actual fire performance depends on the insulation system, materials, installation, and applicable safety requirements.

Maintenance planning

Routine work can focus on cleaning, checking electrical connections, inspecting insulation condition, and monitoring operating temperature. Maintenance intervals should follow the manufacturer's instructions and site conditions.

Configuration flexibility

Voltage ratings, winding materials, cooling arrangements, and enclosure options can be evaluated to suit different project requirements, subject to engineering feasibility.

Dry core transformers may be specified for:

● Commercial buildings: Shopping centers, office complexes, and large residential developments.

● Industrial facilities: Manufacturing plants, workshops, and auxiliary power distribution systems.

● Infrastructure projects: Hospitals, schools, transport facilities, and public buildings.

● Renewable energy systems: Selected solar power and other energy projects where the electrical design calls for dry-type transformation.

 

For example, an industrial facility supplying several production lines may use a dry-type transformer to step down medium-voltage power to the plant's utilization voltage. The final rating should account for the combined demand, motor starting requirements, harmonic loads, and anticipated future expansion.

Before delivery, each transformer is subject to applicable routine tests to verify electrical and mechanical performance. Typical tests may include:

• Winding resistance test
• Voltage ratio and vector group test
• No-load loss and no-load current test
• Impedance voltage and load loss test
• Insulation resistance test
• Dielectric tests
• Oil leakage and pressure tests where applicable

For large EPC or utility projects, third-party inspection and witnessed factory testing can also be arranged according to the approved inspection and test plan.

We provide:

• Direct manufacturer pricing: Factory-direct (Best price for 100% upfront).Skip the middleman and the long wait.
• MOQ: 1 unit – flexible cooperation
• Large stock available, fast delivery
• Service: No bidding, no delays, direct deal for private projects.
• Quality tested. Ready for your mines & factories in your country.
• Standard production lead time: 15 days
• Focused on Chinese distribution and power transformer supply with stable quality and compliance with multiple international standards.
• Power utilities, installers, and EPC contractors are welcome for long-term cooperation.

Contact Zhejiang Hengli Electrical to discuss your dry core transformer requirements and request a configuration proposal based on your project's electrical specifications.

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