Factory nameplate of the S13-2000/6.3 oil-immersed transformer — 2000 kVA, 6.3kV/400V, Dyn11, ONAN, total weight 4,010 kg. Compliant with GB1094.1.2-2013, GB20052-2024, GB/T6451-2023, GB1094.3-2017.
Technical Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Sichuan Zhongxin General Electric Energy Co., Ltd. |
| Product Type | S13-2000/6.3 |
| Product Code | 7121B.2 |
| Rated Capacity | 2000 kVA |
| Vector Group | Dyn11 |
| Number of Phases | 3 (Three-phase) |
| Insulation Level | LI60 AC25 / LI AC5 |
| Service Conditions | Outdoor |
| Rated Frequency | 50 Hz |
| Short-Circuit Impedance | 4.94% |
| Cooling Mode | ONAN |
| Lifting Weight of Equipment | 2,410 kg |
| Weight of Insulating Oil | 780 kg |
| Total Weight | 4,010 kg |
| Standard Codes | GB1094.1.2-2013 / GB20052-2024 / GB/T 6451-2023 / GB1094.3-2017 |
Tapping Position Table
| Tap Position | HV (V) | HV (A) | LV (V) | LV (A) |
|---|---|---|---|---|
| I | 6615 | — | — | — |
| II | 6458 | — | — | — |
| III (Rated) | 6300 | 183.3 | 400 | 2886.8 |
| IV | 6143 | — | — | — |
| V | 5985 | — | — | — |
This unit complies with China GB 20052-2024 at the Grade 3 energy efficiency level as standard. Zhongxin General can also produce Grade 1 and Grade 2 versions on request — the technical standards for Grade 1 products meet and exceed the requirements of COMMISSION REGULATION (EU) No 548/2014 and Commission Regulation (EU) 2019/1783 of 1 October 2019.
2000 kVA — A Capacity Point With Its Own Engineering Demands
At 2000 kVA, the rated low-voltage current climbs to nearly 2,887 A — high enough that conductor sizing, busbar contact resistance, and cooling fin surface area all become engineering decisions rather than simple scaling. The S13-2000/6.3 sits at the upper-middle of the distribution transformer range, commonly specified for industrial workshops, commercial complexes, mid-size data halls, and dedicated substations where a single 1000 kVA or 1250 kVA unit would be undersized but a step up to 2500 kVA isn’t yet justified by load.
Every image below documents the actual 2000 kVA unit at Zhongxin General’s Sichuan factory — this specific capacity, wound, assembled, and tested. We hold dedicated production tooling across the full oil-immersed transformer range, so the 2000 kVA unit is not a smaller unit’s tank with a different nameplate, nor a larger unit photographed to stand in for it.
Manufacturing Process — From Winding to Dispatch
Foil Winding
At 2000 kVA, the low-voltage winding is built using copper foil wound by automatic foil-winding equipment under technician supervision — the foil construction minimizes axial leakage flux and gives the winding the mechanical strength to withstand fault-current forces. Two technicians work the station together: one manages tension and alignment as the foil feeds, the other monitors interlayer insulation placement. This dual-technician process is standard at this capacity, where coil diameter and foil width both increase relative to smaller-capacity units.
HV/LV Winding
The high-voltage winding uses enamelled copper wire wound to turn counts that set the five-tap voltage ratios shown in the table above (6615 V down to 5985 V, ±2×2.5% adjustment around the 6300 V rated tap). Oil-impregnated insulating paper separates each layer. The inter-winding clearance between HV and LV coils is set to meet the LI60 AC25 insulation level — the lightning impulse and power-frequency withstand ratings that determine how the transformer handles switching surges and lightning-induced overvoltage on a 6.3 kV system.
Core Assembly
In parallel with winding, the core is built from cold-rolled grain-oriented silicon steel laminations, stacked sheet by sheet to the calculated cross-section. Two technicians work the stacking process to maintain consistent lamination alignment and clamping pressure across the full core height — directly affecting no-load loss and excitation current, both of which are verified during routine testing before any unit is approved for dispatch.
Winding-to-Core Integration
With both the windings and core complete, the HV/LV coil assembly is lifted, aligned, and lowered onto the core legs. Centering at this stage determines the uniformity of the air gap and clamping pressure around the full circumference of the winding — a step that has a direct, measurable effect on the unit’s final short-circuit impedance value (4.94% on this S13-2000/6.3 configuration).
Oil Tank
The welded steel tank for the 2000 kVA unit is sized to hold the active part plus 780 kg of insulating oil, with corrugated fin walls providing natural convective cooling (ONAN) without external radiator banks. Before the active part is lowered in, the tank interior is inspected for weld quality and cleanliness — any residue left in the tank at this stage would compromise oil dielectric strength for the life of the unit.
Finished Product
The completed S13-2000/6.3 carries an oil conservator (the cylindrical pillow tank visible at the rear) which accommodates oil volume expansion and contraction as load and ambient temperature vary — a feature typically introduced at this capacity range to manage the larger oil volume reliably across the full operating range. The corrugated fin tank wall provides the surface area needed for ONAN cooling without forced-air or forced-oil assistance. Every unit passes the full routine test programme — winding resistance, ratio and vector group, no-load and load loss, impedance, and dielectric withstand — before being approved for dispatch, and no unit leaves the factory without a complete test report.
Dispatch
Once testing is complete and documentation is finalized, the unit is crane-loaded and secured for transport. Our logistics processes for distribution-class transformers like this 2000 kVA unit are the same ones used on documented export projects to Europe, Central Asia, South Asia, and Africa — see our case studies for examples at larger scale, including a prefabricated substation delivered to Aktau Port, Kazakhstan.
Key Features — 2000 kVA Oil-Immersed Transformer
Five-tap voltage adjustment. The standard off-circuit tap changer provides five HV positions from 5985 V to 6615 V (±2×5%), giving flexibility to match local 6.3 kV grid voltage variation without disrupting supply continuity.
Corrugated fin tank with conservator. ONAN natural cooling through the corrugated tank wall, paired with an oil conservator for thermal expansion management — a proven, maintenance-light configuration at this capacity.
4.94% short-circuit impedance. Impedance is verified by routine test on every unit, giving system designers a confirmed value for fault-current and voltage-drop calculations rather than a nominal estimate.
Copper winding standard, aluminium available. As a manufacturing factory rather than a trading company, Zhongxin General produces both copper and aluminium winding configurations, letting customers balance upfront cost against long-term losses according to project budget.
GB 20052-2024 efficiency grades on request. The standard unit ships at Grade 3; Grade 1 and Grade 2 versions are available, with Grade 1 meeting and exceeding EU Commission Regulation No. 548/2014 and 2019/1783 requirements for projects bound for European or EU-aligned markets.
Why Zhongxin General — Our Advantages Over Other Suppliers
Real production photographs of the actual 2000 kVA unit. Every image on this page documents this specific capacity — foil winding, core assembly, tank fabrication, and the finished product. It is common in this industry for suppliers to illustrate a given capacity’s product page using photographs of a different, often much larger, dry-type or oil-immersed unit because they lack tooling or stock at the listed capacity. The difference shows up in coil proportions, tank dimensions, and bushing spacing — and it is visible to anyone who knows what to look for. What we show here is what we ship.
Complete capacity-range production tooling. Zhongxin General holds dedicated molds, winding fixtures, and tank tooling spanning the full oil-immersed capacity range and the complete 30 kVA to 8,000 kVA dry-type range — a breadth of in-house tooling that smaller workshops and trading companies typically cannot match. For the 2000 kVA capacity specifically, this means purpose-built fixtures rather than adapted tooling from an adjacent capacity, which translates into dimensionally consistent coils and predictable delivery timelines.
Factory, not trading company. Sichuan Zhongxin General Electric Energy Co., Ltd. is a National “Little Giant” Enterprise and National High-Tech Enterprise, manufacturing at our own facility in Xinjin District, Chengdu. Winding, core assembly, tank fabrication, oil treatment, and testing all happen on one site — there is no intermediary between you and the production line.
Both copper and aluminium winding options. Many suppliers offer one or the other; as a manufacturer running both production lines, we offer genuine choice based on project economics rather than whatever happens to be in stock.
Full routine testing on every unit, as standard documentation. Test reports are issued with every order by default, not provided only when specifically requested — winding resistance, ratio verification, no-load and load loss, impedance, and dielectric withstand testing are run on every 2000 kVA unit before it leaves the factory.
EU-compliant efficiency grades available on request. Our Grade 1 efficiency products meet and exceed EU Commission Regulation No. 548/2014 and 2019/1783 requirements, making them directly usable for European, Middle Eastern, and other international projects without separate compliance engineering.
Documented international project experience. Export documentation, IEC-aligned testing, FAT witness arrangements, and shipping logistics to difficult destinations are all handled in-house, backed by real, published project case studies rather than generic claims.
Applicable Standards & Testing
Every 2000 kVA oil-immersed transformer manufactured by Zhongxin General undergoes a complete 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, and test reports are provided as standard documentation with every order.
Available Options & Configurations
Winding material: copper (standard) or aluminium. Voltage class: 6 kV, 10 kV, or 35 kV; HV 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); on-load tap changer (OLTC) available on request. Oil type: mineral oil (standard); silicone oil available for high-fire-safety environments. Nitrogen-sealed tank for long-distance sea freight. Export wooden crating with full documentation package.
Typical Applications
The 2000 kVA oil-immersed transformer is widely specified for industrial workshops and manufacturing plants, mid-size commercial buildings and shopping complexes, dedicated substations serving a single large facility, agricultural and irrigation power supply at scale, and as a step-down unit within larger multi-transformer substation projects. At 6.3 kV / 400 V with Dyn11 vector group and ONAN cooling, it serves as a reliable, low-maintenance grid interface for medium-scale loads.
Inquire About 2000 kVA Oil-Immersed Transformer
Need a quotation, technical datasheet, or Factory Acceptance Test arrangement for the 2000 kVA oil-immersed transformer? Tell us your grid voltage, required LV output, frequency, efficiency grade, winding material, and any special 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 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. 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.
