Box-Type Substation BOX SUBSTATION

Anhui Wanxiang Electric Power Equipment Co., Ltd.

Anhui Wanxiang Electric Power Equipment Co. LTD

summary :

The ZGS11-22H (Z)series combined transformers, commonly known as American-style box-type substations, differ from traditional box-type substations in that their transformers, voltage load switches, fuse elements, and other protective components are housed within insulating oil; this design results in a compact structure and utilizes highflash-point insulating oil (>312°C), making them suitable for special application scenarios. These units can be configured with low-voltage distribution, metering, and compensation devices as required.

This product series has been widely deployed acrossChina in residential communities, public venues, industrial and mining enterprises, and other power distribution applications.

characteristic :

1、This series is of the common-tank type. The fuse, high-voltage load switch (or high-voltage load transfer switch), and no-excitation voltage regulation tap changer are all installed as transformer components within the transformer oil tank

2、The capacity range is 100-1600 kVA. This product is suitable for 10 kV distribution networks operating under a neutral-point-insulated system, while the 400 V system employs a three-phase four-wire system with a directly grounded neutral point.

3、The key technical and economic indicators meet international advanced levels for products of this type. It features high integration, reliable power supply, compact size, light weight, and low noise levels.

4、It features both ring-type (ZGS11-13H) and terminal-type (ZGS11-13Z) cable output configurations.

5、 This solution enables the 10 kV power grid to extend deeper into load centers, reduces line losses, improves power supply reliability, enhances the urban environment, and is particularly suitable for urban grid upgrades. By employing a specialized wiring configuration, when a fuse on the high-voltage side of the transformer blows, the non-faulted phase on the low-voltage side of the transformer can still maintain normal voltage supply. Its key advantages include superior voltage quality, no neutral point drift, no heat generation within the enclosure, low noise levels, and excellent lightning protection performance.

6、 It is specially designed such that the transformer core, high-voltage load switch (or high-voltage load transfer switch), fuse, and no-excitation tap changer are all housed within a fully sealed oil tank. This design improves space utilization; its volume is approximately only one-third that of a box-type substation (also known as an EUtype substation) with the same voltage level and capacity, while its weight is significantly reduced.

7、Excellent safety performance. The high-voltage room is fully insulated from the low-voltage room; the two rooms are isolated from each other, and interlocking mechanisms are implemented such that the high-voltage room door may only be opened after the low-voltage room door has been opened.

8、 This system employs a full fault protection scheme utilizing a combination of two-stage fuses (backupcurrentlimiting fuse and insert-type fuse), offering high safety and reliability, flexible operation, and easy fuse replacement.

9、Plug-and-socket cable terminations offer convenient and flexible operation.

10、 The fuel tank features a fully sealed structure with no separate storage tank; the fuel inside the tank is isolated from the external environment. It is leak-proof and requires no maintenance.

11、Low losses. The performance parameters of this series of modular transformers are essentially identical to those of transformers with the same loss level designation.

12、It exhibits strongshort-circuit withstand capability and high overload capacity.

service condition :

Ambient air temperature: \scriptscriptstyle - 3 5 ^ { \circ } \mathbb { C } to + 4 0 ^ { \circ } \mathsf { C }

Maximum daily average temperature: + 3 0 ^ { \circ } \mathsf C

Maximum monthly average temperature: + 2 0 ^ { \circ } \mathsf C

Altitude: Not greater than 2,000 m

Wind speed: Not greater than35 m/s

Seismic horizontal acceleration: not greater

than 0.3g

Installation site inclination: not greater than 3 ^ { \circ }

Pollution Level: Level 3

Relative humidity: shall not exceed 50% at + 4 0 ^ { \circ } \mathsf { C } ; shall not exceed 90% at + 2 0 ^ { \circ } \mathsf C

Product Model Description:

The transformer numbering principles are established in accordance with the JB/T 3837 standard "Method for Model Numbering of Transformer Products" issued by the Ministry of Mechanical and Electrical Engineering.

Technical Performance Parameters of the 10 kV-grade ZGS13-H (Z) Modular Transformer

Chassis Features:

1、Excellent mechanical properties, including high bending resistance, impact resistance, and tensile strength.

2、Exhibits exceptional resistance to sun exposure, radiation, and thermal insulation properties.

3、Excellent anti-freezing, anti-cracking, and anti-corrosion properties.

4、Exhibits excellent moisture-proof and flame-retardant properties, and does not form condensation under sudden cooling or heating conditions.

5、The "all-weather" performance ensures seamless integration with its surrounding environment.

6、The exterior design and decorative colors offer a wide range of options.

7、The enclosure exhibits exceptional weathering resistance, with a service life that can extend up to 50 years.

YBM (P) series

Box-Type Substation (European-Style Box-Type Substation)

summary :

The YBM series box-type substations integrate high-voltage electrical equipment, transformers, and low-voltage electrical equipment into a compact integrated power distribution system. These substations are suitable for various applications, including urban high-rise buildings, residential communities, industrial zones, mining sites, oil fields, off-site work environments, and temporary construction sites, where they serve as components of power distribution systems for receiving and distributing electrical energy. This product features robust performance, a compact structure, safe and reliable operation, easy maintenance, and mobility; compared with conventional earth-based substations, a box-type substation of equivalent capacity typically occupies only 1/10 to1/5 of the space required by a conventional substation. This significantly reduces both the design workload and construction effort, while lowering overall construction costs, making it one of the preferred choices for the construction and retrofitting of substations in urban and rural areas.

service condition :

Environmental temperature: not higher than + 4 0 ^ { \circ } \mathsf C , and not lower than- { * 2 5 ^ { \circ } } \mathsf C ; Altitude: not exceeding 1,000 m; Outdoor wind speed: not exceeding35 m/s:

Relative air humidity: not exceeding90% ( + 2 5 ^ { \circ } \mathsf { C } ) ; seismic horizontal acceleration: 0.4 { \mathsf { M } } / { \mathsf { S } } ^ { 2 } ; verticalacceleration:0.2 { \mathsf { M } } / { \mathsf { S } } ^ { 2 } ; no fire or explosion hazards, severe contamination, chemical corrosion, or intense vibration present in the installation site.

Product Model Description:

The transformer numbering principles are established in accordance with the JB/T 3837 standard "Method for Model Numbering of Transformer Products" issued by the Ministry of Mechanical and Electrical Engineering.

design feature :

1、 This product is composed of a high-voltage distribution device, high-voltage electrical equipment, and a low-voltage distribution device, interconnected to form three functional compartments: the high-voltage compartment, the transformer compartment, and the low-voltage compartment; both the high-voltage and low-voltage compartments are fully equipped with all necessary functions. The primary power supply system on the high-voltage side can be configured in various modes, such as ring-network power supply, terminal power supply, or dual-power supply; it may also be equipped with high-voltage metering components to meet high-voltage metering requirements. For the transformer compartment, options include S11, S13, SCB10, SCB12, as well as other low-loss oil-immersed transformers and dry-type transformers. The transformer compartment is equipped with a high-efficiency self-starting air-cooling system and an illumination system. The low-voltage compartment can adopt either a panel-mounted or cabinet-mounted configuration based on the user's reguirements to implement the desired power supply solution. This system offers a wide range of functions, including power distribution, lighting distribution, no power compensation, electric energy metering, and current measurement, thereby meeting diverse user needs while facilitating power supply management and enhancing power quality.

2、 The high-voltage room features a compact and well-designed structure, equipped with comprehensive anti-misoperation interlocking functions. When requested by the user, the transformer can be fitted with tracks that allow convenient access from both sides of the transformer room doors. Each compartment is equipped with automatic lighting systems; furthermore, all components selected for the high-voltage and low-voltage rooms are characterized by reliable performance and ease of operation, ensuring safe and dependable product operation, as well as straightforward operation and maintenance.

3、 The transformer room employs both natural ventilation and forced ventilation systems to ensure effective cooling. All lowvoltage sections of the transformer room are equipped with ventilation ducts; the exhaust fans are fitted with temperature control devices that can automatically start and stop according to a preset temperature setting, thereby ensuring the transformer operates at full load.

4、The enclosure structure effectively prevents rainwater and contaminants from entering; it is constructed from specialized steel plates or aluminum alloy, treated for corrosion resistance, and designed for long-term outdoor use. This ensures excellent corrosion resistance, waterproofing, and dustproof performance, along with a long service life and an aesthetically pleasing appearance.

Technical Performance Parameters of the YBM(P) Series Box-type Substation

Enclosure structural characteristics:

The enclosure's base frame is fabricated from structural steel and undergoes anti-corrosion treatment; the specifications of the structural steel are selected based on the enclosure size and transformer capacity. The user may choose between a recessed base or an oil-filled base. The walls and roof cover are constructed using "alkali-resistant glass fiber-reinforced special cement with other additives." The external protective door can be configured in two versions: one utilizing "colored galvanized steel plate combined with polystyrene flame-retardant insulation material," and the other utilizing "enhanced external protective spray-applied hard plastic decorative material." The transformer room features a double-layer protective door, with the inner door made of aluminum alloy; all exposed metal components are manufactured from stainless steel. Inside the enclosure, the structure is divided into a high-voltage switchgear room, a transformer room, and a low-voltage switchgear room by means of metal steel plates, ensuring strict isolation between these individual rooms

The structural layout can be categorized into "P-shaped" and "M-shaped" configurations; the operating modes are divided into "internaloperated" and "external-operated" types; overall box-type substations are classified into "single-transformer configuration" and "double-transformer configuration"; high-voltage switches include "terminal-type" power supply and "loop-type" power supply options; primary wiring configurations consist of "cable-type" and "busbar-type" arrangements; the electric energy metering secondary instrument system comprises both internalmounted and external-mounted variants; each compartment is equipped with lighting fixtures, a locking switch, and a forced ventilation unit.

Depending on the specific requirements of the user, various structures and components may be selected from our company. The bottom sides of the enclosure are equipped with sliding lifting devices, facilitating lifting, transportation, and installation. All four sides of the base frame feature general grounding points, allowing users to select the configuration at their discretion. The high-and low-voltage switchgear room can adopt either a standard configuration or a panel-mounted or frame-type structure; the former offers greater system integration capability, while the latter provides a compact and space-efficient overall design.

Technological Innovation Has Forged the Century-Long Legacy of Wanxiang.

Anhui Wanxiang Electric Power Equipment Co., Ltd.