Box-Type Substation

BOX SUBSTATION

Anhui Wanxiang Electric Power Equipment Co., Ltd.

Anhui Wanxiang Electric Power Equipment Co. LTD

State Grid Grid-connected Enterprises

Yuanxiang Electric

Power

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Anhui Wanxiang Electric Power Equipment Co. LTD Technological Innovation: Building a Century-Old Wanxiang

summary ：

10 kV-level ZGS11-22-H (Z) series

Combination Transformer (American-Style Box-Type Transformer)

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 across China 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 EU-

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Anhui Wanxiang Electric Power Equipment Co. LTD Technological Innovation: Building a Century-Old Wanxiang

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.

Ambient air temperature: -35°C to +40°C

Maximum daily average temperature: +30°C

Maximum monthly average temperature:

+20°C

Altitude: Not greater than 2,000 m

Wind speed: Not greater than 35 m/s

Relative humidity: shall not exceed 50% at +40°C; shall not exceed 90% at +20°C

Seismic horizontal acceleration: not greater

than 0.3g

Installation site inclination: not greater than

3°

Pollution Level: Level 3

Primary rated voltage (kV)

Transformer rated capacity (KVA)

High-voltage wiring scheme (where H denotes the ring-type configuration and Z denotes the

terminal-type configuration)

Three boxes

Deterioration level code

Common-box type

Combination Transformer

Z G S /

Product Model Description:

service condition ：

type 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 (backup currentlimiting 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 strong short-circuit withstand capability and high overload capacity.

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Anhui Wanxiang Electric Power Equipment Co. LTD Technological Innovation: Building a Century-Old Wanxiang

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

Chassis Features:

High voltage

(kV) Step range (%)

Low pressure （kV）

50 1.1 0.91/0.87 2 4

63 0.11 1.09/1.04 1.9 4

80 0.13 1.31/1.25 1.9 4

100 0.15 1.58/1.50 1.8 4

125 0.17 1.89/1.80 1.7 4

160 0.2 2.31/2.20 1.6 4

200 0.24 2.73/2.60 1.5 4

250 0.29 3.2/3.05 1.4 4

315 0.34 3.83/3.65 1.4 4

400 0.41 4.52/4.30 1.3 4

500 0.48 5.41/5.15 1.2 4

630 0.57 6.2 1.1 4.5

800 0.7 7.5 1 4.5

1000 0.83 10.3 1 4.5

1250 0.97 12 0.9 4.5

1600 1.17 14.5 0.8 4.5

No-load

current %

Short-circuit

impedance

%

6

6.3

10

10.5

11

±5

±2×2.5 0.4

Dyn1

1

Yyn0

Capacity

Specified

（kVA）

Voltage Combination Connect

ion

Group

No-load

loss (kW)

Load losses

（kW）

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.

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Anhui Wanxiang Electric Power Equipment Co. LTD Technological Innovation: Building a Century-Old Wanxiang

Environmental temperature: not higher than +40°C, and not lower than-25°C;

Altitude: not exceeding 1,000 m; Outdoor wind speed: not exceeding 35 m/s:

Relative air humidity: not exceeding 90% (+25°C); seismic horizontal

acceleration: 0.4 M/S²; vertical acceleration: 0.2 M/S²; no fire or

explosion hazards, severe contamination, chemical corrosion, or

intense vibration present in the installation site.

summary ：

YBM（P） series

Box-Type Substation (European-Style Box-Type

Substation)

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 to 1/5 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 ：

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Anhui Wanxiang Electric Power Equipment Co. LTD Technological Innovation: Building a Century-Old Wanxiang

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.

Primary system maximum voltage (KV)

Transformer Rated Capacity

(KVA) Design Serial Number

Eye-shaped structure (where P denotes

a triangle-shaped structure); substation

Pre-installed

Y B /

Product Model Description:

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 requirements 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.

design feature ：

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Anhui Wanxiang Electric Power Equipment Co. LTD Technological Innovation: Building a Century-Old Wanxiang

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.

Transformers can be designed as oil-immersed or dry-type; the former has a larger volume but is more cost-effective; the latter features a smaller size, superior reliability, does not pose a risk of combustion or explosion, and is suitable for various applications.

Suitable for use in various environments.

Name Unit High-voltage electrical equipment Transformer Low voltage equipment

Rated voltage kV 10 10/0.4 0.4

Rated current A 630 100-2000

Rated frequency HZ 50 50 50

Rated capacity kVA 30–600

Rated thermal withstand current kA 20 /4S 30-1S

Rated dynamic stability current (peak

value)

kA 50 63

Rated closing short-circuit current (peak

value)

kA 50 15-30

Rated short-circuit breaking current kA 31.5 (Circuit breaker)

Rated breaking load current A 630

It is rated for power-frequency

withstand voltage.

kV Earth-to-phase 42; inter-breaks between

phases 48 35/28(min) 3.0/2.5

Lightning impulse withstand voltage kV To Earth, between phase IHI75 break points

5

75

Enclosure protection rating IP IP23 IP23 IP23

Noise level dB Oil dielectric constant ≤55;

Dielectric constant ≤65

Available methods Individual 3 2 8-15

Minimum reactive power compensation requirement for lowvoltage systems kvar 300

Anhui Wanxiang Electric Power Equipment Co., Ltd.

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

Address: No.19 Xingyu Road, High-tech Industrial Development

Zone, Lu'an City, Anhui Province

Tel: 0564-3616257 | Fax: 0564-3616259

Website:www.ahwanxiang.com

Email:anhuiwanxiang959@163.com