Technical Specifications
| Parameter | Value |
| Model | S13-M-100/10 |
| Rated Capacity | 100 kVA |
| Phases | 3-Phase |
| Frequency | 50 Hz (60 Hz available) |
| High Voltage | 10 kV — Tap I: 10,500 V / Tap II: 10,000 V (rated) / Tap III: 9,500 V |
| Rated HV Current (Tap II) | 5.77 A |
| Low Voltage | 400 V |
| Rated LV Current | 144.3 A |
| Vector Group | Dyn11 |
| Insulation Level | LI 75 / AC 35 / LI AC 5 |
| Cooling Method | ONAN |
| Service Conditions | Outdoor |
| Applicable Standards | GB1094.1.2-2013, GB1094.3-2017, GB/T6451-2015, GB 20052-2020 |
Every parameter shown on the nameplate is verified through routine factory acceptance testing before dispatch. The nameplate above is from an actual production unit — not a stock image or a specification sheet mockup. The unit pictured complies with GB 20052-2020 Grade 3 energy efficiency requirements as standard. Grade 1 and Grade 2 versions are available on request, with Grade 1 technical performance at or above the requirements of EU Commission Regulation No. 548/2014 and Commission Regulation (EU) 2019/1783 Tier 1 and Tier 2.
Manufacturing Process — From Winding to Dispatch
Unlike suppliers who illustrate small-capacity product pages with stock photographs of larger units, every image below documents the actual 100 kVA unit: this specific capacity, wound, assembled, dried, and completed at our Sichuan facility.
Winding & Internal Assembly
The high-voltage winding uses high-quality enamelled copper wire wound to precise turn counts, with oil-impregnated insulating paper between layers. The low-voltage winding is designed to carry the rated LV current of 144.3 A at tap position II. Both coils are wound to dimensional tolerances that directly govern the no-load loss, load loss, and short-circuit impedance values stamped on the nameplate.
This is a step where shortcuts produce failures in service — and a step we do not shortcut.
Insulation Drying
The assembled active part enters the high-temperature drying oven for controlled heat treatment. This process removes residual moisture from oil-impregnated paper, inter-layer insulation, and all structural insulating materials. It is the step that establishes the finished unit’s dielectric strength — and a step that cannot be compressed without long-term reliability consequences.
Finished Product
The corrugated fin tank design provides effective ONAN natural cooling without the need for external radiator panels — a proven, compact configuration widely used at this capacity in pole-mounted and ground-mounted outdoor distribution. Once the active part is inspected and accepted, it is inserted into the tank, oil is filled, and the unit proceeds to factory acceptance testing.
Factory Acceptance Testing & Dispatch
No unit leaves our factory without a complete test report. The full routine test programme is documented and provided as standard documentation with every order.
Applicable Standards & Testing
Every 100 kVA oil-immersed transformer manufactured by Zhongxin General undergoes a full routine test programme before dispatch.
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
Type tests (reports available on request):
- Temperature rise test
- Lightning impulse test
Special tests (available on request):
- Partial discharge measurement
- Sound level (noise) measurement
- Short-circuit withstand test
All tests are conducted to IEC 60076 and GB 1094 / GB/T 6451. 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, or 35 kV; HV customisable to match local grid standards
- Low voltage: 380 V, 400 V, 415 V, 433 V, or other values on request
- Frequency: 50 Hz (standard) or 60 Hz
- Energy efficiency grade: GB 20052-2020 Grade 1, Grade 2, or Grade 3
- Tap changer: ±2×2.5% off-circuit (standard); on-load tap changer (OLTC) available on request
- Service conditions: Outdoor (standard); indoor available
- Oil type: Mineral oil (standard); silicone oil for high-fire-safety environments on request
- Nitrogen-sealed tank for long-distance sea freight
- Export wooden crating with full documentation package
Typical Applications
The 100 kVA oil-immersed distribution transformer is a standard workhorse of rural electrification, agricultural power supply, small commercial facilities, light industrial installations, and township distribution networks. At 10 kV / 400 V with Dyn11 vector group and ONAN cooling, it serves as the grid interface for end-use equipment across a wide range of project types — straightforward to specify, straightforward to install, and built to operate reliably for decades with minimal maintenance.
For larger capacity requirements in the same voltage class, see our 160 kVA oil-immersed distribution transformer and 80 kVA oil-immersed distribution transformer. For higher-voltage or higher-capacity applications, our oil-immersed transformer product range covers 30 kVA to 100 MVA across 6 kV, 10 kV, 35 kV, 66 kV, and 110 kV voltage classes.
Why Zhongxin General — Our Advantages Over Other Suppliers
Real product photographs at the actual capacity. Every image on this page documents the 100 kVA unit itself — from winding through to dispatch. Many suppliers illustrate distribution transformer pages with images of larger units or use manufacturer stock photographs that bear no relation to what is actually built and shipped. Our process photographs give you verifiable evidence of what we manufacture at 100 kVA.
Full in-house production cycle. Winding, active part assembly, insulation drying, oil treatment, tank assembly, and factory acceptance testing are all performed at our Sichuan facility. No outsourcing of critical manufacturing steps.
All energy efficiency grades available. We produce Grade 1, Grade 2, and Grade 3 versions to GB 20052-2020. Our Grade 1 units meet and exceed EU Commission Regulation No. 548/2014 and 2019/1783 Tier 1 and Tier 2 requirements, backed by CE Declaration of Conformity for international projects.
Copper and aluminium winding both available. As a manufacturing factory, we offer both configurations to match project budget and specification requirements.
Documented international project experience. Export documentation, IEC compliance, FAT witness arrangements, and logistics to international destinations are handled in-house. Browse our case studies for documented evidence — including a 1,250 kVA dry-type transformer export to Europe, a 5,000 kVA step-up transformer for a Nepal hydropower station, and a prefabricated substation for Aktau Port, Kazakhstan.
Full routine testing, every unit, test report as standard. No transformer leaves our factory without passing the complete routine test programme.
Inquire About 100 kVA Oil-Immersed Transformer
Need a quotation, technical datasheet, or Factory Acceptance Test arrangement for the 100 kVA oil-immersed distribution transformer? Tell us your grid voltage, required LV output, frequency, efficiency grade, and any special environmental or installation conditions — and we will configure the right unit for your project.
Contact Us for Price & Datasheet
About Zhongxin General — Oil-Immersed 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 oil-immersed transformer portfolio covers 30 kVA to 100 MVA, configurable to 6 kV, 10 kV, 35 kV, 66 kV, 110 kV, and higher voltage classes, in both GB and IEC standard configurations for domestic and international projects. The 100 kVA oil-immersed distribution transformer described on this page is one of our most widely produced distribution-class units — supplied to rural distribution networks, agricultural power projects, commercial facilities, and industrial installations across China and international markets.
Every transformer we manufacture undergoes full routine testing to IEC 60076 or GB 1094 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.
