S11-DM Series (10 kV) Underground Transformer
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S11-DM Series (10 kV) Underground Transformer
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Product Description
Product Overview:
Structure of Underground Transformers and Billboard‑Style Low‑Voltage Units: Underground transformers are divided into aboveground and underground sections. The main body is installed in a concrete pit, occupying no surface space. Both the transformer and its enclosure are equipped with high‑voltage bushings and low‑voltage terminals, high‑voltage load switches and backup fuses, plug‑in surge arresters, pressure relief valves, vacuum pressure gauges, temperature controllers, and oil level indicators—all accessible for observation and operation from ground level. The tank is fabricated from stainless steel, featuring a fully sealed design and a hermetically welded flange to minimize sealing surfaces, ensuring long‑term safe operation even in challenging underground environments. The aboveground portion of the underground transformer adopts a hybrid structure that integrates a billboard with a low‑voltage switchgear cabinet. Inside the enclosure is a low‑voltage distribution panel, while both sides serve as neon‑lit advertising billboards, suitable for public service announcements, traffic guidance, road information, and more, delivering striking visual impact. Employing underground transformers combined with billboard‑style low‑voltage units aligns with urban ecological design principles: they enhance the urban landscape, occupy minimal ground space, and are well suited for use along major city thoroughfares, at airports, on highways, and in residential neighborhoods.
Product Features:
1. Suitable for urban environments (installable in basements or cellars), particularly well-suited to densely populated central cities.
2. Suitable for lighting and power systems in streets, highways, bridges, tunnels, parking lots, airports, ports, tourist attractions, and more.
3. The high- and low-voltage incoming and outgoing lines employ a fully sealed, fully insulated, and fully shielded wiring configuration.
4. The enclosure is constructed from corrosion-resistant stainless steel, fully sealed, and can be immersed in water for a specified period.
5. The protection system gives full consideration to ease of operation and safety, with components sourced from the U.S.-based COOPER company.
6. The underground transformer is operated using an operating rod and features the same operating mode as a combined transformer.
7. Taking into full account the specific thermal‑dissipation requirements, the transformer has been designed for low losses and low operating temperatures.
8. Install waterproof ingress protection and automatic drainage measures inside the transformer vault.
Ordering Instructions:
When placing your order, please provide the following parameters:
1. Product Model
2. Rated Capacity
3. Voltage Combination
4. Scope of Adjustment
5. Frequency
6. Connection Group Designation
7. Short-circuit impedance
8. For products with special requirements, specify the technical specifications.
Technical Data Sheet for the S11-DM Series (10 kV) Underground Transformer
Rated Capacity (kVA) | Rated voltage | Connection Group | No-load current (%) | No-load loss (W) | Load loss (W) | Impedance Voltage (%) | |
High voltage (kV) | Low voltage (kV) | ||||||
30 | 6 ±2×2.5% or 6.3 ±2×2.5% or 10 ±2×2.5%
| 0.4 | Yyn0 Dyn11 | 2.1 | 100 | 600/630 | 4
|
50 | 2.0 | 130 | 870/910 | ||||
80 | 1.8 | 180 | 1250/1310 | ||||
100 | 1.6 | 200 | 1500/1580 | ||||
125 | 1.5 | 240 | 1800/1890 | ||||
160 | 1.4 | 280 | 2200/2310 | ||||
200 | 1.3 | 340 | 2600/2730 | ||||
250 | 1.2 | 400 | 3050/3200 | ||||
315 | 1.1 | 480 | 3650/3830 | ||||
400 | 1.0 | 570 | 4300/4520 | ||||
500 | 1.0 | 680 | 5150/5410 | ||||
630 | 0.9 | 810 | 6200 | 4.5 | |||
800 | 0.8 | 980 | 7500 | ||||
1000 | 0.7 | 1150 | 10300 | ||||
1250 | 0.6 | 1360 | 12000 | ||||
1600 | 0.6 | 1640 | 14500 | ||||
2000 | 0.6 | 1960 | 17800 | 5.5 | |||
2500 | 0.5 | 2310 | 20700 | ||||
Note: For transformers with a rated capacity of 500 kVA or less, the load loss values above the diagonal line in the table apply to the Yyn0 connection group, while those below the diagonal line apply to the Dyn11 connection group.
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Product Inquiry
Company Address: Hai’an Industry Park, Hai’an County, Jiangsu
Sales Hotline:0086-0513-88780188
After-sales service:0086-0513-88782288
Fax: 0086-0513-88782959
Postal code: 226600
Website:www.jsmadq.com
Email:jsmadq@sina.com 2930515310@qq.com
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