zishengelectric
Project Partners
Phone/WhatsApp: 8619131285373
Email: info@zishengtransformer.com
Factory Headquarters: No. 118, Jingyi Street, Economic Development Zone.
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Project Partners
Phone/WhatsApp: 8619131285373
Email: info@zishengtransformer.com
Factory Headquarters: No. 118, Jingyi Street, Economic Development Zone.
The 100kVA Dry Type Transformer is a three-phase, oil-free transformer designed for safe and reliable electrical power distribution. It uses air as the cooling medium and can be supplied in cast resin, VPI, or other dry-type configurations according to project requirements.
A typical configuration is 10kV / 0.4kV, 100kVA, 50Hz, Dyn11, although the primary and secondary voltages, vector group, impedance, enclosure and other parameters can be customized.
The transformer complies with IEC 60076-11, the international standard covering dry-type power transformers.
| Parameter | Standard Specification |
|---|---|
| Rated Capacity | 100 kVA |
| Phase | Three Phase |
| Frequency | 50 / 60 Hz |
| HV Voltage | 10 kV |
| LV Voltage | 0.4 kV / 400 V |
| Voltage Ratio | 10 / 0.4 kV |
| Vector Group | Dyn11 |
| Cooling Method | AN / AF |
| Insulation Type | Cast Resin |
| Insulation Class | F / H |
| Impedance | 4% typical |
| HV Tapping | ±2 × 2.5% or ±5% |
| Winding Material | Copper / Aluminum |
| Temperature Rise | ≤100 K typical |
| Installation | Indoor / Outdoor with enclosure |
| Protection | IP00 / IP20 / IP21 / IP31 etc. |
| Standard | IEC 60076-11 |
| Ambient Temperature | Typically -25°C to +40°C |
| Altitude | ≤1000 m standard; higher altitude available |
Actual loss, dimensions, weight, noise level and other values should be finalized according to the selected design and applicable efficiency standard. Published 100kVA designs show considerable variation in these parameters.
For a standard 100kVA / 10kV / 0.4kV transformer, a representative technical configuration is:
| Item | Typical Value |
|---|---|
| Rated Power | 100 kVA |
| HV | 10 kV |
| LV | 400 V |
| Frequency | 50 Hz |
| Vector Group | Dyn11 |
| Impedance | 4% |
| No-load Loss | Approx. 200–400 W |
| Load Loss | Approx. 1.4–1.8 kW |
| Cooling | AN |
| Insulation | Class F |
| Temperature Rise | ≤100 K |
| HV Tap | ±2 × 2.5% |
| Noise | Approx. 50–60 dB(A) |
| Core | Grain-oriented electrical steel |
| Winding | Copper / Aluminum |
For example, published 100kVA designs list 220W no-load loss and 1,400W load loss, while other IEC-oriented designs specify 252W and 1,800W respectively. This demonstrates why the final datasheet should use the manufacturer's project-specific guaranteed values rather than generic figures.
No transformer oil is required, eliminating oil leakage and significantly reducing fire and environmental risks.
Cast-resin insulation provides strong fire-retardant characteristics and is particularly suitable for buildings and indoor electrical rooms.
The dry-type structure eliminates oil testing, oil replacement and many maintenance requirements associated with oil-immersed transformers.
Vacuum-cast epoxy resin provides strong electrical insulation and mechanical protection for the windings.
The cast windings have strong mechanical stability and can withstand electromagnetic forces during short-circuit conditions.
Optimized magnetic core and winding structures help reduce operating noise, making the transformer suitable for commercial and industrial buildings.
HV/LV voltage, vector group, impedance, winding material, enclosure, cooling method and monitoring system can be customized.
The transformer core is manufactured from high-quality grain-oriented electrical steel with optimized magnetic flux distribution.
Typical construction includes:
The HV winding can use copper or aluminum conductors and is insulated using cast resin or VPI technology depending on the selected transformer design.
For cast-resin transformers, vacuum casting helps reduce internal voids and improve insulation reliability.
The LV winding is designed to provide:
For cast-resin versions, the winding is encapsulated with epoxy resin to protect the conductor and insulation system against moisture, dust and environmental contamination.
The standard cooling method is:
AN — Air Natural
Natural air circulation removes heat from the transformer during normal operation.
An optional:
AF — Air Forced
system can be installed using cooling fans. Forced-air cooling can increase the transformer's available output under appropriate operating conditions, but the actual permissible capacity must be determined by the manufacturer's thermal design.
Optional components include:
A temperature monitoring system can be supplied for projects requiring enhanced protection.
Typical configuration:
PT100 Sensors → Temperature Controller → Alarm / Trip → Cooling Fan Control
Functions can include:
Temperature monitoring and communication options are commonly available for modern dry-type transformer designs.
The basic transformer can be supplied as an IP00 open type unit for installation inside a dedicated transformer room.
For greater protection, it can be equipped with a metal enclosure.
Typical options:
IP20 → IP21 → IP31 → IP41
The enclosure can be customized according to:
IEC 60076-11 specifically addresses environmental, climatic, fire-behavior and enclosure-related considerations for dry-type transformers.
The 100kVA Dry Type Transformer can be customized according to EPC and project specifications.
LV options:
Factories, workshops, manufacturing plants and machinery power distribution.
Shopping centers, office buildings, hotels and commercial complexes.
Suitable for locations where fire safety and reliable indoor power distribution are important.
Can be integrated into low-voltage and medium-voltage power distribution systems.
Suitable for solar PV systems, energy storage systems and other renewable-energy applications.
Airports, railway systems, tunnels, ports and public facilities.
Special configurations can be designed for demanding industrial and mining environments.
Dry-type transformers are widely used in buildings, industrial plants, hospitals, airports and other applications where oil-free and fire-safe power distribution is advantageous.
Each transformer should undergo appropriate factory testing before shipment.
Depending on project requirements:
For EPC projects, the manufacturer can provide a Factory Test Report (FAT) and supporting quality documentation.
The transformer should be properly protected before international transportation.
Typical packaging:
Transformer → Moisture Protection → Shock Protection → Wooden Case / Steel Frame → Container Loading
Export packaging can include:
For EPC projects, packing can be customized according to the destination country, transportation method and site requirements.
For a typical overseas EPC project, I would recommend presenting the product specification like this:
100kVA Dry Type Transformer
10kV / 0.4kV | 50Hz | 3 Phase
Cast Resin | Dyn11 | AN/AF
IEC 60076-11
Copper / Aluminum Windings
Custom Voltage & Enclosure
Factory Tested Before Delivery
This is more suitable for an international product page than simply listing “100kVA Dry Type Transformer”, because EPC buyers usually need to quickly confirm capacity + voltage + standard + cooling + vector group + customization capability.
100kVA Dry Type Transformer | 10kV to 0.4kV | IEC 60076-11
Safe. Oil-Free. Custom-Engineered.
Designed for industrial, commercial, infrastructure and renewable-energy power distribution projects, with customized voltage, insulation, enclosure, cooling and protection options.
The following specification is suitable for a 100kVA Cast Resin Dry Type Transformer product page and can be adjusted according to the actual project requirements.
| Item | Technical Specification |
|---|---|
| Transformer Type | Dry Type, Cast Resin |
| Rated Capacity | 100 kVA |
| Number of Phases | Three Phase |
| Rated Frequency | 50 / 60 Hz |
| Rated HV Voltage | 6kV / 6.6kV / 10kV / 11kV / 13.8kV / 20kV / 22kV / 33kV |
| Rated LV Voltage | 380V / 400V / 415V / 440V / 460V / 480V / 690V |
| Standard Voltage Ratio | 10kV / 0.4kV |
| HV Tapping Range | ±2 × 2.5% or ±5% |
| Vector Group | Dyn11 / Yyn0 / Customized |
| Insulation Material | Epoxy Resin |
| Winding Material | Copper / Aluminum |
| Cooling Method | AN / AF |
| Insulation Class | F / H |
| Temperature Rise | ≤100K, or as specified |
| Impedance Voltage | 4% typical, customizable |
| Core Material | High-Quality Grain-Oriented Silicon Steel |
| Core Construction | Step-Lap / Mitred Core |
| Installation | Indoor / Outdoor |
| Enclosure Protection | IP00 / IP20 / IP21 / IP31 / IP40, etc. |
| Temperature Monitoring | Optional PT100 + Digital Temperature Controller |
| Cooling Fans | Optional |
| Noise Level | Low-Noise Design |
| Altitude | ≤1000 m standard; higher altitude available |
| Ambient Temperature | -25°C to +40°C standard |
| Relative Humidity | ≤90% |
| Insulation Level | According to rated voltage and applicable standard |
| Standards | IEC 60076-11 / IEC 60076 Series |
| Efficiency | High-Efficiency Design |
| Application | Industrial, Commercial, Infrastructure, Renewable Energy |
| Customization | Voltage, Frequency, Impedance, Tapping, Enclosure, Cooling, Protection, Dimensions |
Rated Power: 100 kVA
Primary Voltage: 10 kV
Secondary Voltage: 0.4 kV
Frequency: 50 Hz
Phase: 3 Phase
Vector Group: Dyn11
Cooling: AN
Impedance: 4%
HV Tapping: ±2 × 2.5%
Winding: Copper / Aluminum
Note: Final guaranteed values for no-load loss, load loss, impedance, temperature rise, noise, dimensions and weight should be confirmed in the project-specific technical datasheet, because these values vary with voltage, material, efficiency class and design configuration.
The 100kVA Dry Type Transformer can be customized according to project specifications, local grid requirements, installation conditions, and EPC technical standards.
Optional intelligent monitoring systems include:
The transformer can also be engineered for:
For EPC and utility projects, Zisheng can provide project-specific transformer design and documentation, including:
Custom Voltage • Custom Protection • Custom Enclosure • Custom Cooling • Project-Specific Engineering
Every 100kVA Dry Type Transformer undergoes comprehensive factory testing before shipment to verify its electrical performance, insulation integrity, mechanical condition, and overall manufacturing quality.
Routine tests are performed on each transformer before delivery and typically include:
For cast-resin dry-type transformers, insulation performance is particularly important.
Testing can include:
Partial Discharge (PD) testing can be provided according to project requirements to verify the quality and reliability of the cast-resin insulation system.
The transformer design is evaluated for thermal performance, including:
Before shipment, the transformer is inspected for:
According to customer or EPC project requirements, additional tests may include:
For large EPC and utility projects, a Factory Acceptance Test (FAT) can be arranged before shipment.
The FAT can include:
Document Review → Visual Inspection → Electrical Tests → Insulation Tests → Functional Tests → Test Report → Customer Approval
Customers or third-party inspectors can participate in the inspection according to the agreed inspection plan.
After testing, the manufacturer can provide:
100% Factory Tested Before Delivery
IEC-Compliant Testing • Quality Verification • FAT Support • Complete Test Documentation
Each 100kVA Dry Type Transformer is subjected to routine testing before delivery to verify that the finished transformer meets the specified electrical, insulation, and performance requirements.
| Test Item | Purpose |
|---|---|
| Winding Resistance Test | Verifies winding resistance and connection quality |
| Voltage Ratio Test | Confirms the correct HV/LV transformation ratio |
| Vector Group Test | Verifies phase displacement and winding connections |
| Polarity Test | Confirms correct winding polarity |
| No-Load Loss Test | Measures core loss under rated voltage |
| No-Load Current Test | Checks magnetizing current and core condition |
| Short-Circuit Impedance Test | Verifies impedance and winding characteristics |
| Load Loss Test | Measures winding losses under specified conditions |
| Applied Voltage Test | Verifies insulation withstand capability |
| Induced Voltage Test | Checks turn-to-turn and inter-layer insulation |
| Insulation Resistance Test | Evaluates insulation condition between windings and ground |
| Partial Discharge Test | Optional test for cast-resin insulation quality |
| Temperature Monitoring Test | Checks PT100 and temperature controller operation |
| Cooling Fan Test | Verifies AF cooling system operation when equipped |
| Appearance Inspection | Checks resin, terminals, enclosure and overall assembly |
| Nameplate Verification | Confirms rated voltage, capacity, frequency and other data |
The testing process verifies key parameters including:
Special attention is given to the insulation system of the dry-type transformer.
Testing verifies:
HV Winding → LV Winding → Ground
to ensure adequate electrical insulation and withstand capability.
For cast-resin transformers, partial discharge testing can be included as an additional quality-control requirement when specified by the customer or EPC contractor.
After electrical testing, the transformer undergoes a final inspection covering:
A complete Routine Test Report can be supplied with the transformer, recording the actual measured values and acceptance results.
100% Routine Tested Before Shipment
Electrical Performance • Insulation Integrity • Manufacturing Quality • Test Documentation
The 100kVA Dry Type Transformer is designed for reliable medium-voltage to low-voltage power distribution where high safety, low maintenance, compact installation, and oil-free operation are required.
Used for power distribution in:
The dry-type design is suitable for installations requiring reliable power supply with reduced fire and maintenance risks.
Suitable for:
Its oil-free construction makes it suitable for installation close to electrical loads and inside dedicated electrical rooms.
Used in:
The high fire-safety characteristics of dry-type transformers make them suitable for buildings where safety and continuity of power supply are important.
The 100kVA transformer can be integrated into:
Customized voltage ratios can be provided according to the inverter, collection system, and grid requirements.
Special configurations can be supplied for:
For harsh environments, options such as enhanced enclosure protection, corrosion-resistant treatment, high-altitude design, and customized cooling can be considered.
Dry-type transformers can be used in data-center electrical distribution systems where:
Optional temperature monitoring and communication systems can support centralized power-management requirements.
Suitable for:
The transformer can be customized for:
High Humidity • Coastal Areas • Dusty Environments • High Altitude • Tropical Climate • Desert Conditions
Additional protection, enclosure and insulation configurations can be designed according to the actual installation environment.
Medium Voltage Grid
↓
100kVA Dry Type Transformer
↓
400V / 415V Low Voltage Distribution
↓
Industrial / Commercial / Infrastructure Loads
For EPC contractors, the 100kVA dry-type transformer can be configured according to:
Industrial Power Distribution • Commercial Buildings • Renewable Energy • Infrastructure • Mining • Data Centers
A 100kVA Dry Type Transformer is an oil-free electrical transformer with a rated capacity of 100kVA. It is commonly used to step medium voltage down to low voltage for industrial, commercial, infrastructure, and renewable-energy applications.
A common configuration is:
10kV / 0.4kV — 100kVA — 50Hz — 3 Phase — Dyn11
Other voltage ratios such as 6kV, 6.6kV, 11kV, 13.8kV, 20kV, 22kV and 33kV can be customized.
Yes. The transformer can be manufactured with copper or aluminum windings according to the customer's requirements, project specifications, and budget.
For cast-resin versions, the windings are encapsulated with epoxy resin insulation. The insulation system can be designed according to the required voltage class, environmental conditions, and applicable standards.
Yes. A dry-type transformer does not use transformer oil for insulation or cooling, reducing the risks associated with oil leakage and fire.
The standard cooling method is:
AN — Air Natural
An optional:
AF — Air Forced
cooling system with fans can also be supplied when required.
Yes. The basic open-type transformer is normally intended for indoor installation. For outdoor applications, it can be supplied with a suitable weatherproof protective enclosure and environmental protection.
Yes. The transformer can be customized for different HV/LV voltages, 50Hz or 60Hz frequency, vector groups, tapping ranges, impedance and insulation levels.
The dry-type transformer can be designed and manufactured according to IEC 60076-11 and applicable IEC 60076 series requirements. Other standards can be considered according to the destination market and project specification.
Each transformer undergoes routine factory testing, which may include:
Additional partial discharge, temperature-rise, impulse, noise, and other special tests can be arranged when required.
Yes. Factory Acceptance Testing (FAT) can be arranged according to the agreed inspection and test plan. Customer or third-party inspection can also be supported when required.
Yes. Special designs can be provided for:
The insulation, cooling, enclosure, materials and other components can be adjusted accordingly.
Optional monitoring and protection systems include:
The transformer can be protected with waterproof wrapping, reinforced wooden cases or steel-frame packaging, with additional protection for terminals, accessories and sensitive components.
Packaging can be customized according to the transportation method and destination.
Yes. Depending on the project requirements, documentation can include:
Yes. Zisheng can provide project-specific engineering and manufacture the 100kVA Dry Type Transformer according to customer drawings, technical specifications, voltage requirements, applicable standards, installation conditions, and project documentation requirements.
Custom Design • Factory Tested • EPC Support • Global Delivery
100kVA Dry Type Transformer