Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | S13-M-200/10 |
| Product Code | 7011B |
| Rated Capacity | 200 kVA |
| Phases | 3-Phase |
| Rated Frequency | 50 Hz |
| Connection Symbol | Dyn11 |
| Insulation Level | LI75 AC35 / LI AC5 |
| Cooling Mode | ONAN |
| Service Conditions | Outdoor |
| Short-Circuit Impedance | 3.91% |
| Lifting Weight of Equipment | 438 kg |
| Weight of Insulation Oil | 132 kg |
| Total Weight | 724 kg |
| Ex-Factory No. | A250182 |
| Ex-Factory Date | May 2026 |
| Standard Codes | GB1094.1.2-2013 / GB20052-2024 / GB/T 6451-2023 / GB1094.3-2017 |
Tapping Position Table:
| Tapping Position | High Voltage (V) | High Voltage (A) | Low Voltage (V) | Low Voltage (A) |
|---|---|---|---|---|
| I | 10500 | — | — | — |
| II | 10000 | 11.5 | 400 | 288.7 |
| III | 9500 | — | — | — |
Real Delivery Case — S13-M-200/10, 200 kVA
The specifications and images on this page are from an actual manufactured and dispatched unit — S13-M-200/10, Ex-factory No. A250182, produced at Zhongxin General’s Sichuan facility in May 2026. Every parameter on the nameplate is verified through routine factory acceptance testing before dispatch. Every image is an authentic production photograph of this specific product.
This is a meaningful distinction. Many suppliers illustrate small-capacity transformer pages with photographs of larger units — or use stock images from unrelated products. The 10 photos on this page are all genuine production-line shots of the 200 kVA oil-immersed transformer itself: from winding inspection through core assembly, final product, and loaded dispatch. What you see is exactly what you receive.
Manufacturing Process
The winding is the heart of any oil-immersed transformer. For the S13-M-200/10, the LV winding uses high-conductivity copper foil or round wire wound concentrically around the high-permeability silicon steel core limbs. The HV winding is wound on the outside of the LV coil, separated by oil-impregnated insulating paper and pressboard barriers. All inter-layer insulation is pre-dried and the complete core-and-coil assembly is vacuum oil-filled after tank enclosure.
The iron core uses cold-rolled grain-oriented silicon steel, cut and stacked with a five-stage full-oblique joint configuration to minimise no-load loss and no-load current. The completed core is surface-coated with epoxy resin for corrosion protection and noise reduction before the windings are installed.
Once the core is completed and the winding coils pass dimensional and resistance checks, the active part assembly begins. The coil sets are carefully lowered onto the core limbs, lead connections are made and insulated, and the complete active part is dried in a vacuum oven before tank insertion and oil filling.
Finished Product
The finished S13-M-200/10 transformer features a corrugated fin radiator tank — the corrugated wall design provides both structural rigidity and a large natural convection cooling surface, eliminating the need for separate radiator panels at this capacity. The oil conservator expansion tank on the top accommodates oil volume changes with temperature cycling and prevents moisture ingress.
Key Features
Low no-load loss and high energy efficiency. The S13-M-200/10 is produced to GB 20052-2024 Grade 3 as standard; Grade 1 and Grade 2 efficiency options are available. Grade 1 efficiency products meet or exceed the requirements of EU Commission Regulation (EU) No. 548/2014 and its 2019/1783 amendment — making them suitable for European market deployment without further modification.
Aluminium winding option available. As a manufacturing factory, Zhongxin General produces both copper-winding and aluminium-winding versions of the S13-M-200/10. Aluminium-winding units offer a cost advantage while meeting the same electrical performance and GB/IEC standard requirements. Winding material can be specified at order.
Outdoor-rated, sealed tank construction. The corrugated fin tank is fully welded and pressure-tested before oil filling. The ONAN cooling mode requires no external power, fans, or active cooling components — the transformer operates silently and maintenance-free throughout its service life.
Three-tap off-circuit tap changer. The standard ±5% off-circuit tap changer (positions I / II / III at 10,500V / 10,000V / 9,500V) allows voltage adjustment to match local grid conditions. Adjustment is made with the transformer de-energised. On-load tap changers (OLTC) are available as a special option.
Complete routine testing before dispatch. Every unit leaves the factory with a full test report covering winding resistance, voltage ratio and vector group, no-load loss and current, load loss and short-circuit impedance, and induced and separate-source AC withstand tests — all to IEC 60076 and GB 1094 standards.
Applicable Standards & Testing
Every 200 kVA oil-immersed transformer manufactured by Zhongxin General undergoes a full routine test programme before dispatch. No unit leaves the factory 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.
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. Factory Acceptance Test (FAT) with client witness is supported.
Available Options & Configurations
- Winding material: copper (standard) or aluminium
- Voltage class: 6 kV, 10 kV, 11 kV, 15 kV, 22 kV, 33 kV, 35 kV; customizable to match local grid
- 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; EU 548/2014 Tier 1/Tier 2
- Tap changer: ±2×2.5% off-circuit (standard); OLTC available on request
- High-altitude versions for installations above 1000 m a.s.l.
- Tropical, high-humidity, and coastal salt-spray versions available
- Nitrogen-sealed tank and export wooden crating for sea freight
Dispatch & Delivery
At 200 kVA, the transformer ships fully assembled with oil filled — requiring no field assembly beyond cable termination and earthing. The total weight of 724 kg makes standard road transport straightforward. For international export, units can be prepared with nitrogen-sealed tanks and ISPM 15-compliant wooden crating. Delivery to major Chinese ports or direct to project sites across China is available.
Why Zhongxin General — Manufacturer Advantages
Compared with other suppliers of 200 kVA oil-immersed transformers, Zhongxin General offers several concrete advantages:
Real product photographs at every capacity. Every image on this page is an authentic production photo of the 200 kVA transformer itself — not a substitute image of a larger unit. This reflects our actual production capability at this capacity, not an image library assembled for marketing purposes.
Complete capacity-range production tooling. Zhongxin General holds production tooling and dies covering the complete capacity range from 30 kVA to 100 MVA for oil-immersed transformers. The 200 kVA S13-M has its own dedicated core, winding, and tank tooling — enabling fast production turnaround and consistent dimensional quality, unlike suppliers who adapt tooling from adjacent capacity classes.
Both winding materials in-house. Copper-winding and aluminium-winding versions are both manufactured in-house at the same facility under the same quality system. You get factory-direct pricing on both options without a sub-supplier in the chain.
Grade 1 efficiency available. Our Grade 1 efficiency versions (GB 20052-2024) exceed the energy efficiency requirements of EU Commission Regulation (EU) No. 548/2014 and 2019/1783 — supporting international buyers who need EU-compliant supply from a Chinese factory.
Verified delivery track record. Our case studies and company news document real deliveries — from small distribution transformers to 63 MVA / 110 kV units — with actual factory and site photographs on every project.
National “Little Giant” Enterprise status. Zhongxin General holds China’s National “Little Giant” Enterprise designation and National High-Tech Enterprise certification — the highest innovation recognition for SME manufacturers in China.
Typical Applications
The 200 kVA oil-immersed distribution transformer is widely used in rural distribution networks, small commercial and industrial facilities, agricultural power supply, prefabricated box-type substations, and light manufacturing. Its outdoor-rated corrugated tank, self-cooling ONAN design, and 30+ year service life make it one of the most cost-effective power distribution solutions at this capacity.
For larger transformer and substation projects from Zhongxin General, see our oil-immersed transformer range and project case studies.
Inquire About 200 kVA Oil-Immersed Transformer
Need a quotation, technical datasheet, or delivery schedule? Tell us your grid voltage, required LV output, frequency, efficiency grade, winding material, and installation conditions — and we will configure the right unit and provide pricing and timeline.
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 at No. 998 Xinghua 5 Road, Xinjin District, Chengdu, Sichuan Province, the company holds National “Little Giant” Enterprise status and National High-Tech Enterprise certification. Our oil-immersed transformer portfolio covers 30 kVA to 100 MVA, configurable to 6 kV, 10 kV, 11 kV, 22 kV, 33 kV, 35 kV, 66 kV, 110 kV, and 132 kV voltage classes in copper or aluminium winding, to GB and IEC standards.
Every transformer undergoes full routine testing before dispatch. Test reports are issued as standard documentation with every order.
