10kV Three-phase Oil-immersed Low-loss Energy-saving Distribution Transformer
Key attributes
| Brand | ROCKWILL |
| Model NO. | 10kV Three-phase Oil-immersed Low-loss Energy-saving Distribution Transformer |
| Rated voltage | 10kV |
| Rated frequency | 50/60Hz |
| Rated capacity | 400kVA |
| Series | S11 |
Product descriptions from the supplier
Product Description
The 10kV Three-phase Oil-immersed Low-loss Energy-saving Distribution Transformer is a core component of modern power distribution networks, engineered for superior efficiency and reliability. Utilizing advanced core materials and an optimized design, it significantly reduces no-load and load losses compared to standard models. This transformer delivers substantial energy savings and lower operating costs over its lifespan, making it an economically smart and environmentally responsible choice for utilities and industries aiming to enhance the sustainability of their power infrastructure.
Product model
Conditions of use
Key Technical Features
Advanced Low-Loss Core Design:Constructed with high-grade, low-loss amorphous alloy or high-permeability silicon steel core, which dramatically reduces no-load (core) losses, the primary source of energy waste in transformers.
Optimized Energy Efficiency:Meets or exceeds stringent energy efficiency standards (such as IE3, IE4 or Chinese GB Standard). Its design minimizes total ownership cost by prioritizing high performance at both full and partial loads.
Robust Oil-Immersed Construction:The time-tested oil-immersed design provides excellent insulation and heat dissipation, ensuring stable operation, a long service life, and reliable performance under fluctuating load conditions.
Reduced Operating Costs:The significant reduction in energy losses translates directly into lower electricity bills, offering a rapid return on investment and a smaller carbon footprint.
Durable and Reliable Performance:Features a fully sealed tank to prevent oil oxidation, corrugated radiators for effective cooling, and high-quality components to ensure minimal maintenance and maximum uptime.
Performance Parameters: Technical Parameters of S11-30~1600/6~10/0.4 Series Oil-immersed Distribution Transformer
Rated Capacity |
Voltage Combination and Tapping Range |
Connection Group |
No-load Loss (W) |
Load Loss at 120℃ (W) |
Short-circuit Impedance % |
No-load Current % |
Outline Dimensions (Length * Width * Height mm) |
Total Weight (kg) |
Foot Mounting Dimensions (mm) |
||
High Voltage (kV) |
Tapping Range % |
Low Voltage (kV) |
|||||||||
30 |
6 6.3 6.6 10 10.5 11 |
± 5 ± 2×2.5 |
0.4 |
Dyn11 Yyn0 |
100 |
630/600 |
4.0 |
2.3 |
785 * 525 * 920 |
351 |
400 * 450 |
50 |
130 |
910/870 |
2.0 |
820 * 540 * 1000 |
442 |
400 * 450 |
|||||
63 |
150 |
1090/1040 |
1.9 |
850 * 565 * 1057 |
540 |
400 * 500 |
|||||
80 |
180 |
1310/1250 |
1.9 |
860 * 570 * 1125 |
549 |
400 * 500 |
|||||
100 |
200 |
1580/1500 |
1.8 |
910 * 635 * 1110 |
605 |
550 * 550 |
|||||
125 |
240 |
1890/1800 |
1.7 |
1020 * 645 * 1120 |
624 |
550 * 550 |
|||||
160 |
280 |
2310/2200 |
1.6 |
1045 * 675 * 1170 |
784 |
550 * 550 |
|||||
200 |
340 |
2730/2600 |
1.5 |
1105 * 745 * 1195 |
865 |
550 * 550 |
|||||
250 |
400 |
3200/3050 |
1.4 |
1145 * 745 * 1235 |
1018 |
550 * 600 |
|||||
315 |
480 |
3830/3650 |
1.4 |
1185 * 780 * 1290 |
1096 |
550 * 650 |
|||||
400 |
570 |
4520/4300 |
1.3 |
1295 * 835 * 1315 |
1466 |
550 * 650 |
|||||
500 |
680 |
5410/5150 |
1.2 |
1350 * 905 * 1410 |
1534 |
660 * 650 |
|||||
630 |
810 |
6200 |
4.5 |
1.1 |
1465 * 955 * 1475 |
1942 |
660 * 650 |
||||
800 |
980 |
7500 |
1.0 |
1505 * 970 * 1595 |
2186 |
660 * 750 |
|||||
1000 |
1150 |
10300 |
1.0 |
1675 * 1140 * 1625 |
2394 |
660 * 850 |
|||||
1250 |
1360 |
12000 |
0.9 |
1735 * 1205 * 1805 |
3254 |
660 * 850 |
|||||
1600 |
1640 |
14500 |
0.8 |
1935 * 1290 * 1855 |
3800 |
820 * 950 |
|||||
Note: for transformers rated at 500 kva and below, the load loss values above the diagonal lines in the table apply to dyn 11 or yzn 11 connection groups, and the load loss values below the diagonal lines apply to yyno connection groups.
Typical Application Scenarios
Public Utility Grids: Widely used in 10kV distribution substations for stepping down voltage to supply residential communities, commercial districts, and public facilities.
Industrial Power Supply: Serves as a dedicated power source for factories, manufacturing plants, and industrial parks where continuous operation and energy cost control are critical.
Renewable Energy Integration: Functions as a grid-connection point for distributed generation sources like solar and wind farms, where high efficiency is crucial for maximizing energy yield.
Infrastructure Projects: Provides reliable power for key infrastructure such as water pumping stations, railway systems, and airports, ensuring operational stability and energy savings.
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Related Knowledges
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Main Transformer Accidents and Light Gas Operation Issues1. Accident Record (March 19, 2019)At 16:13 on March 19, 2019, the monitoring background reported a light gas action of No. 3 main transformer. In accordance with the Code for Operation of Power Transformers (DL/T572-2010), operation and maintenance (O&M) personnel inspected the on-site condition of No. 3 main transformer.On-site confirmation: The WBH non-electrical protection panel of No. 3 main transformer reported a Phase B light gas action of the transformer body, and the reset was ineff02/05/2026 -
Faults and Handling of Single-phase Grounding in 10kV Distribution LinesCharacteristics and Detection Devices for Single-Phase Ground Faults1. Characteristics of Single-Phase Ground FaultsCentral Alarm Signals:The warning bell rings, and the indicator lamp labeled “Ground Fault on [X] kV Bus Section [Y]” illuminates. In systems with a Petersen coil (arc suppression coil) grounding the neutral point, the “Petersen Coil Operated” indicator also lights up.Insulation Monitoring Voltmeter Indications:The voltage of the faulted phase decreases (in01/30/2026 -
Neutral point grounding operation mode for 110kV～220kV power grid transformersThe arrangement of neutral point grounding operation modes for 110kV～220kV power grid transformers shall meet the insulation withstand requirements of transformer neutral points, and shall also strive to keep the zero-sequence impedance of substations basically unchanged, while ensuring that the zero-sequence comprehensive impedance at any short-circuit point in the system does not exceed three times the positive-sequence comprehensive impedance.For 220kV and 110kV transformers in new constructi01/29/2026 -
Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?Why Do Substations Use Stones, Gravel, Pebbles, and Crushed Rock?In substations, equipment such as power and distribution transformers, transmission lines, voltage transformers, current transformers, and disconnect switches all require grounding. Beyond grounding, we will now explore in depth why gravel and crushed stone are commonly used in substations. Though they appear ordinary, these stones play a critical safety and functional role.In substation grounding design—especially when multiple gr01/29/2026 -
Why Must a Transformer Core Be Grounded at Only One Point? Isn't Multi-Point Grounding More Reliable?Why Does the Transformer Core Need to Be Grounded?During operation, the transformer core, along with the metal structures, parts, and components that fix the core and windings, are all situated in a strong electric field. Under the influence of this electric field, they acquire a relatively high potential with respect to ground. If the core is not grounded, a potential difference will exist between the core and the grounded clamping structures and tank, which may lead to intermittent discharge.I01/29/2026 -
Understanding Transformer Neutral GroundingI. What is a Neutral Point?In transformers and generators, the neutral point is a specific point in the winding where the absolute voltage between this point and each external terminal is equal. In the diagram below, pointOrepresents the neutral point.II. Why Does the Neutral Point Need Grounding?The electrical connection method between the neutral point and earth in a three-phase AC power system is called theneutral grounding method. This grounding method directly affects:The safety, reliabilit01/29/2026
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