Zhongxin General is a Chinese manufacturer and factory supplying S11‑M‑630/10GY 630 kVA three‑phase outdoor oil‑immersed distribution transformer. Rated 10 kV input down to 400 V output with Dyn11 vector group and ONAN natural oil cooling. It complies with GB1094.1.2‑2013, GB/T 6451‑2023, GB 20052‑2024 and IEC 60076 standards. Our Grade 1 high‑efficiency variant exceeds requirements of EU Commission Regulation No. 548/2014 and Commission Regulation (EU) 2019/1783. Both copper‑winding and aluminium‑winding configurations are available for domestic power grids and overseas distribution projects.
Technical Specifications
| Parameter | Value |
|---|---|
| Product Type | S11‑M‑630/10GY |
| Product Code | 7116B |
| Phases | 3‑Phase |
| Connection Symbol | Dyn11 |
| Insulation Level | LI75 AC35 / LI AC5 |
| Rated Frequency | 50 Hz |
| Service Conditions | Outdoor |
| Cooling Method | ONAN |
| Short‑Circuit Impedance | 4.30 % |
| Body Weight | 1050 KG |
| Insulating Oil Weight | 274 KG |
| Total Weight | 1690 KG |
| Factory No. | A240316 |
| Ex‑factory Date | Mar, 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(Rated) | 10000 | 36.4 | 400 | 909.3 |
| Ⅲ | 9500 | ‑ | ‑ | ‑ |
| Ⅳ | ‑ | ‑ | ‑ | ‑ |
| Ⅴ | ‑ | ‑ | ‑ | ‑ |
All above data comes from real‑unit nameplate. Every parameter is validated through complete routine factory acceptance testing before shipment. If you need smaller‑capacity distribution transformers, please view our 160 kVA oil‑immersed transformer and 200 kVA oil‑immersed transformer product pages.
Manufacturing Process
Many competitors reuse generic or larger‑capacity stock photos for 630 kVA transformer product pages. Every picture on this page is real‑shot production photography of this exact 630 kVA unit, taken inside our Sichuan manufacturing facility, covering winding, insulation processing, iron‑core assembly, final finished‑unit and loading‑for‑delivery. What you view matches exactly what you will receive.
High‑voltage and low‑voltage windings are the core components determining transformer loss and reliability. Our 630 kVA coils are precisely wound with high‑conductivity conductor material. After winding is finished, workers carefully handle copper‑bar insulation treatment to avoid partial‑discharge risks in long‑time outdoor running.
The iron‑core is built from high‑performance grain‑oriented silicon‑steel sheets. Our experienced workers complete core stacking strictly following process specifications to minimise no‑load loss and operational noise level.
Once silicon‑steel core stacking work finishes, the whole core assembly waits for winding hoisting‑in, followed by high‑temperature vacuum drying procedure to fully eliminate internal moisture, improving insulation performance and service life.
After drying treatment, core‑and‑winding active‑part will go through lead‑wire connection, tank installation and vacuum oil‑filling, before moving on to multi‑item factory routine tests.
Finished‑Product Overview
This S11‑M‑630/10GY oil‑immersed transformer adopts corrugated fin welded tank for outdoor application. Corrugated wall offers both mechanical strength and large natural convection cooling surface without extra radiator panels.
The off‑circuit tap‑changer supports ±5 % voltage adjustment at tap‑position I / II / III, to adapt actual local grid‑voltage conditions. Tap‑changing operation must be performed under de‑energised condition. On‑load tap‑changer(OLTC) solution can be offered as customised option upon request.
Core Advantages of Zhongxin General 630 kVA Oil‑Immersed Transformer
‑ 100 % real‑shot product photographs: All images are genuine workshop photos for this 630 kVA model, not reused stock images of other‑capacity transformers; ‑ Flexible winding‑material options: In‑house manufacturing for both copper‑winding and cost‑optimised aluminium‑winding versions, complying with identical GB / IEC performance requirements; ‑ High‑efficiency Grade 1 option available: Grade 1 efficiency product surpasses EU 548/2014 & 2019/1783 energy‑efficiency rules, convenient for European‑market projects; ‑ Complete in‑house production capacity: We own full sets of production tooling for 630 kVA oil‑immersed transformer including core, winding and tank dies, supporting stable quality and fast lead‑time delivery; ‑ Full‑set routine tests for every unit: Each transformer passes winding‑resistance test, ratio‑vector‑group check, no‑load & load‑loss measurement, short‑circuit‑impedance, withstand‑voltage test before leaving factory, with complete test report supplied; ‑ Outdoor maintenance‑free ONAN cooling: No auxiliary fan power required, quiet running for rural power network, box‑type substation and industrial distribution scenarios; ‑ Customisable technical options: We support modification for high‑altitude, coastal salt‑spray anti‑corrosion, 60 Hz frequency and other special‑working‑condition requirements.
Applicable Standards & Test Items
Each 630 kVA oil‑immersed transformer implements test system according to GB 1094 series and IEC 60076:
Routine tests (executed for every finished unit): winding‑resistance measurement; voltage ratio & vector‑group verification; no‑load loss & no‑load‑current; load‑loss & short‑circuit‑impedance; induced over‑voltage withstand test; separate‑source AC withstand‑voltage test.
Type tests: temperature‑rise test, lightning‑impulse test (test‑reports available on request).
Special tests: partial‑discharge test, noise‑level test, short‑circuit withstand‑test, available upon client requirement. Witnessed Factory‑Acceptance‑Test(FAT) can be arranged.
Dispatch & Delivery
This 630 kVA oil‑immersed transformer is fully assembled and oil‑filled before delivery. Total weight reaches 1690 KG. Domestic delivery can be transported by standard truck. For overseas export orders, we can supply nitrogen‑sealed tank and ISPM 15 export wooden crating. We deliver to major Chinese ports or directly to on‑site project locations. You can read our case‑studies page to view more completed transformer‑project references.
Typical Applications
630 kVA S11‑M‑630/10GY oil‑immersed distribution transformer is widely applied for rural power‑distribution‑networks, small‑and‑medium industrial plants, commercial zones, agricultural power‑supply, and prefabricated box‑type substations. Its outdoor‑rated sealed tank and long service‑life make it a cost‑effective power‑distribution‑solution at this power‑rating. For more oil‑immersed‑transformer series, please visit our oil‑immersed‑transformer product‑category page.
Request Quotation & Datasheet
If you need quotation, technical datasheet or delivery‑schedule for 630 kVA oil‑immersed transformer, please tell us your grid‑voltage, required low‑voltage‑output, frequency, efficiency‑grade, winding‑material and installation‑environment conditions. We will configure proper solution for you with price and lead‑time information.
Contact Us for Price & Datasheet
About Zhongxin General
Zhongxin General (Sichuan Zhongxin General Electric Energy Co., Ltd.) is a Chinese professional manufacturer specialising in oil‑immersed power transformers, dry‑type transformers, HV/MV/LV switch‑gears, prefabricated substations and energy‑storage‑substation equipment. Our factory locates in Xinjin District, Chengdu City, Sichuan Province. We hold National “Little Giant” Enterprise and National High‑Tech Enterprise qualification. Our oil‑immersed‑transformer product‑range covers capacity from 30 kVA up to 63 MVA, complying with GB and IEC international‑standards. Every finished transformer is fully tested and issued corresponding test‑reports before dispatch. View our About‑Us page for further company‑profile details.
