Technical Specifications
| Parameter | Value |
| Product Type | SCB14-5000/10 |
| Standard Code | GB1094.1.2-2013, GB20052-2024, GB/T10228-2023, GB1094.3-2017 |
| Product Code | 1ZX.710.1530 |
| Vector Group | Dyn11 |
| Rated Capacity | 5000 kVA |
| High Voltage (HV) | 10500V / 10250V / 10000V / 9750V / 9500V |
| HV Current | 288.7 A |
| Low Voltage (LV) | 690 V |
| LV Current | 4183.7 A |
| Insulation Level | LI 75 AC 35 / LI AC3 |
| Rated Frequency | 50 Hz |
| Number of Phases | 3 (Three-phase) |
| Thermal Class | Class H |
| Temperature Rise Limit | 125 K |
| Cooling Mode | AN/AF |
| Service Conditions | Indoor |
| Short-circuit Impedance | 8.2% |
| Protection Degree | IP00 |
| Total Weight | 9360 KG |
This is a product that complies with the China GB 20052-2024 standard at the Level 2 energy efficiency rating. Our company can also produce products at Level 1 and Level 3 energy efficiency ratings. Among them, the technical standards for GB Level 1 energy efficiency products are equivalent to or higher than the relevant provisions of COMMISSION REGULATION (EU) No 548/2014 and Commission Regulation (EU) 2019/1783 of 1 October 2019.
Why 5000 kVA Is a Demanding Capacity Class
A 5000 kVA cast resin dry-type transformer occupies a capacity tier where engineering precision separates reliable long-term performers from units that will develop problems under sustained load. At this rating, the LV winding must reliably carry rated currents exceeding 7,200 A; the vacuum epoxy casting process must achieve void-free encapsulation across a substantially larger winding volume than mid-range units; and the short-circuit withstand forces during fault conditions demand a structurally robust core-and-coil clamping design.
This capacity class is chosen for large industrial facilities, heavy manufacturing parks, major data centre campuses, new energy step-up installations, petrochemical and LNG plants, rail transit substations, and significant commercial infrastructure projects — wherever continuous high power density, indoor fire safety, and long service life without maintenance are required simultaneously.
Zhongxin General’s Sichuan production lines support the complete 5000 kVA dry-type manufacturing cycle in-house: silicon steel core preparation, LV foil winding, HV coil winding, vacuum epoxy casting, controlled hot-air curing, surface grinding, final assembly, and full factory acceptance testing.
Manufacturing Process
Low-Voltage Foil Winding — Ventilation Strip Insertion
The low-voltage winding of the 5000 kVA transformer adopts a copper foil winding structure. High-quality copper foil is wound by automatic foil winding machine, with DMD epoxy resin pre-impregnated interlayer insulation between winding layers. Ventilation channel strips are inserted during winding to define the axial cooling passages; these are removed after epoxy casting and curing, leaving the finished air channels that enable the ANAF cooling mode. The LV output copper busbars are connected to the foil winding via argon-arc protected welding, achieving low contact resistance — a critical requirement for the sustained delivery of the very high rated LV current at 5000 kVA.
HV Winding Coil Winding
The high-voltage winding is wound with precision enamelled copper conductor. The winding geometry and interlayer insulation are controlled to meet the impulse withstand and partial discharge requirements of IEC 60076-11. After winding is complete, the HV coil enters the vacuum casting mould for epoxy encapsulation.
LV Winding Post-Cure — Ventilation Strip Removal
After the full epoxy cure cycle in the controlled hot-air oven, the ventilation strips are removed to expose the axial cooling channels in the LV coil. The uniform epoxy resin surface confirms a void-free vacuum casting result. The coils are subsequently surface-ground to dimensional tolerance before final assembly. This post-cure inspection stage is critical for confirming dielectric quality before assembly proceeds.
Final Assembly — HV Terminal End
Final assembly integrates the iron core and HV/LV coil assemblies, installs structural clamping components, fits the temperature control system and ANAF cooling fans, and completes all busbar and terminal connections. The HV terminal arrangement is rated for 10 kV class service, with creepage and clearance distances verified to IEC 60076-11 insulation level requirements.
Final Assembly — LV Busbar End
The LV copper busbars at 5000 kVA are dimensioned to handle sustained high-current output with minimum resistive heating. The busbar cross-section and connection point design reflect the thermal and mechanical demands of continuous operation at this capacity rating.
Core Lamination Detail
The iron core uses imported high-quality cold-rolled grain-oriented silicon steel sheets with a five-stage full-oblique joint structure. The core is bound with F-class non-woven tape and surface-coated with epoxy resin to reduce no-load loss, no-load current, and audible noise. Automated shearing and stacking equipment ensures tight lamination tolerances across the full core column height of the 5000 kVA unit.
HV Copper Busbar Connection Set
The six HV-side copper busbars form the complete three-phase connection set for the 5000 kVA unit. Each piece is precision-machined and silver-plated at contact surfaces to minimise contact resistance and ensure stable performance throughout the service life of the transformer.
Completed Units — Three-Quarter Views
The three-quarter views reveal the cooling fan framework, LV busbar exit arrangement, core clamping structure, and overall unit depth. At 5000 kVA, the ANAF cooling system is designed to support sustained overload operation beyond nameplate capacity when the forced-air fans are running, providing a practical operational margin for facilities with variable peak demand profiles.
Applicable Standards & Testing
Every 5000 kVA dry-type transformer manufactured by Zhongxin General undergoes a full routine test programme before dispatch. No unit is dispatched without a complete test report.
Routine tests (every unit):
- Winding resistance measurement
- Voltage ratio and vector group verification
- No-load loss and no-load current
- Load loss and short-circuit impedance
- Induced overvoltage withstand test
- Separate-source AC withstand test
- Partial discharge measurement
Type tests (reports available on request):
- Temperature rise test
- Lightning impulse test
Special tests (available on request):
- Sound level (noise) measurement
- Short-circuit withstand test
All tests are conducted to IEC 60076-11 and GB/T 10228-2023. Factory Acceptance Test (FAT) with client witness is supported. Test reports and ITP documentation are provided as standard with every order.
Available Options & Configurations
- Winding material: copper (standard) or aluminium
- Voltage class: 6 kV, 10 kV, 35 kV; customizable to match local grid standards
- Low voltage: 380 V, 400 V, 415 V, 433 V, or other values
- Frequency: 50 Hz (standard) or 60 Hz
- Energy efficiency grade: GB 20052-2024 Grade 1, Grade 2, or Grade 3
- Tap changer: ±2×2.5% off-circuit (standard); OLTC available on request
- Protection degree: IP00 / IP20 / IP30 with metalwork enclosure
- Temperature control: intelligent controller standard; RS485/Modbus optional
- High-altitude versions for installations above 1000 m a.s.l.
- Tropical, high-humidity, and coastal salt-spray versions available
Typical Applications
The 5000 kVA cast resin dry-type transformer is specified wherever large power demand, indoor fire safety, and long-term maintenance-free operation must be achieved simultaneously:
- Large industrial facilities — Heavy manufacturing, chemical plants, metallurgical operations
- Data centres — High-density power supply with zero oil-spill risk
- New energy projects — Large-scale solar PV step-up and wind farm collection substations
- Petrochemical & LNG — Fire safety critical environments, offshore and onshore
- Rail transit — Traction substations and station power distribution infrastructure
- Major commercial development — Airports, large mixed-use complexes, hospitals
For examples of Zhongxin General delivering power infrastructure at this scale, see our 16,730 kVA intelligent power system for Xinjin District People’s Hospital, which included 12 dry-type transformers across multiple capacity ratings, and our 22 KYN28-12 switchgear units and 2 SCB18 transformers shipped for a CATL supply chain project in Zigong.
Inquire About 5000 kVA Dry-Type Transformer
Need a quotation, technical datasheet, or Factory Acceptance Test arrangement? Tell us your grid voltage, required LV output, frequency, efficiency grade, voltage class, winding material, and installation conditions — and we will configure the right unit for your project.
Contact Us for Price & Datasheet
About Zhongxin General — Dry-Type Transformer Manufacturer & Factory
Zhongxin General (Sichuan Zhongxin General Electric Energy Co., Ltd.) is a China-based manufacturer and factory specialising in oil-immersed power transformers and dry-type power transformers, HV/MV/LV switchgear, prefabricated substations, and energy storage systems.
Headquartered in Xinjin District, Chengdu, Sichuan Province, the company holds National “Little Giant” Enterprise status — China’s highest SME innovation designation — alongside National High-Tech Enterprise certification.
Our dry-type transformer portfolio covers 30 kVA to 8000 kVA, configurable to 6 kV, 10 kV, and 35 kV voltage classes in copper or aluminium winding, to GB, IEC 60076-11, and EU standards. Every unit undergoes full routine testing before dispatch; test reports are issued as standard documentation with every order.
Browse all case studies and company news to evaluate Zhongxin General as a supplier. For our European export experience with dry-type transformers, see how we navigated EU standards compliance on a real 1250 kVA export project.
