​Box Type Sustations: Iterative Upgrades and Diverse Applications to Meet Needs

Box Type Sustations: Iterative Upgrades and Diverse Applications to Meet Needs

As a key piece of equipment in power transmission, Box Type Sustations are widely used in various scenarios such as residential communities, industrial and mining enterprises, and public buildings due to their advantages of integration, miniaturization, and mobility. From the mature and stable European-style Box Type Sustations to the efficient and convenient American-style Box Type Sustations, and then to the innovative adaptations of domestically produced Box Type Sustations, my country's prefabricated substation industry has undergone multiple iterations, gradually forming a product system that adapts to different needs. At the same time, it also faces pressing issues such as fire prevention and capacity expansion.

European-style Box Type Sustations: Complete Structure, Adaptable to Basic Power Supply in Multiple Scenarios

European-style Box Type Sustations are characterized by their regular structure and comprehensive functions. Their enclosure consists of three parts: a base, an outer shell, and a top cover. Materials include channel steel, steel plates, and color steel plates, strictly adhering to the "five-proof" standards of sun protection, rain protection, dust protection, rust prevention, and prevention of small animals entering. To cope with high summer temperatures, the top of the enclosure is typically filled with insulation materials such as rock wool boards and polystyrene foam. Simultaneously, optimized ventilation design and increased heat dissipation area balance insulation and heat dissipation requirements, reducing manufacturing costs.

Internally, European-style Box Type Sustations feature independent high-voltage distribution equipment, a transformer room, and a low-voltage room. The high-voltage distribution equipment is available in terminal and ring network types, with flexible options for overhead or underground cable connections. It is equipped with SF6 gas arc extinguishing or vacuum arc extinguishing switches and can be configured with high-voltage metering cabinets according to user needs. The transformer room is equipped with an automatic temperature control system, prioritizing lower-cost oil-immersed transformers, with capacities ranging from 100-1250KVA. The low-voltage room is designed with separate power and lighting supply modes or pure lighting power supply modes, depending on whether it's for industrial or residential areas, and the number of output lines can be adjusted as needed.

American-style Box Type Sustations: High efficiency and convenience, but localization needs improvement.

American-style Box Type Sustations entered the Chinese market in the 1990s, characterized by their compact size and high overload capacity. They allow for 2 hours of 2x overload and 7 hours of 1.6x overload, and utilize elbow-type connectors for easy high-voltage cable connection and live plugging/unplugging. Internally, they employ double fuse protection and high-flash-point FR3 insulating oil, integrating high-voltage load switches, fuses, and other components with the transformer core and windings into a single tank, simplifying the structural design.

However, American-style Box Type Sustations have several shortcomings in localized applications. Imported products are not adapted to my country's high-voltage metering requirements, their capacity levels do not match domestic standards, and they lack local maintenance services. Domestically manufactured imitations generally suffer from inadequate anti-corrosion treatment of the casing, exposed tanks susceptible to external damage, and lack of oil temperature protection, requiring regular inspection, maintenance, and insulating oil replacement, increasing operating costs.

Domestically Produced Box Type Sustations: Integrating Innovation, Balancing Safety and Adaptability

Addressing the shortcomings of imported American-style Box Type Sustations, domestically produced substations have achieved innovative upgrades while absorbing the advantages of European and American designs, forming a product system more suited to China's national conditions. Domestically produced substations are equipped with grounding switches and surge arresters, ensuring the personal safety of maintenance personnel through mechanical interlocking; they adopt a single-fuse protection design, where the blowing of any phase fuse triggers the load switch to trip, improving operational safety.

Structurally, domestically produced substations feature an independent cabinet design, with separate transformer, high-voltage switch, and low-voltage switch compartments. The transformer can be easily pulled out or lifted for convenient maintenance and capacity expansion; the casing undergoes special anti-corrosion treatment, providing protection for over 20 years, and the appearance can be customized in color to suit the usage environment. Furthermore, domestically produced substations can be flexibly configured with metering and compensation functions, using S9 fully sealed low-loss transformers, and some products have experimented with using amorphous alloy cores to further reduce energy consumption. Among them, the ZGS(B)9 "American-style prefabricated substation" integrates the advantages of European and American products, boasting a compact size and reliable operation, and is widely used in various important locations.

Supporting Technology Upgrades: Microcomputer-Based Integrated Protection Devices Strengthen Safety Defenses

With the intelligent development of Box Type Sustations, microcomputer-based integrated protection devices have become core supporting equipment. This device integrates protection, monitoring, control, and communication functions, and has more than twenty built-in standard protection programs. It can comprehensively collect voltage, current, analog, and switching quantities of primary equipment, adapting to various protection needs of 10KV and other user projects. Its ultra-thin body and alloy shell design are particularly suitable for small cabinets such as Box Type Sustations and ring main units. An RS485 communication interface can be selected according to requirements to further enhance the intelligent management level of the equipment.

Opportunities and Challenges Coexist; Promising Future for the Prefabricated Substation Industry

Currently, Box Type Sustations have become the main direction for rural power grid transformation and the construction of various substations, and their application is increasingly widespread in urban, rural, industrial, and mining scenarios. However, the industry still faces three major challenges: First, fire hazards are prominent; the fully sealed design is not conducive to fire fighting, and adding an automatic fire extinguishing system will increase manufacturing costs. Second, expansion is difficult; due to size and cost limitations, the expansion margin of outgoing line bays is small. Third, insufficient maintenance space is not conducive to equipment maintenance and emergency repairs. Looking ahead, with continuous technological advancements, Box Type Sustations will achieve breakthroughs in areas such as optimized fire protection design, enhanced capacity expansion, and improved maintenance conditions. Simultaneously, they will adapt to diverse application scenarios by incorporating trends towards intelligent and energy-efficient systems. As a crucial component of the power system, Box Type Sustations will help elevate the operational level of my country's power grid, providing more reliable power security for economic and social development.

CEHO Box Type Substation Promotion

Chenghe Electric Power Technology Group Co., Ltd., as a key enterprise in China's prefabricated substation industry, is committed to integrating advanced technologies at home and abroad to create high-quality, efficient, and safe box type substations that adapt to diverse application scenarios. Based on the iterative upgrading experience of European-style, American-style, and domestically produced box type substations, we have optimized and innovated to launch a full range of products covering European-style, ZGS(B)9-type American-style, and customized domestic box type substations, perfectly solving the industry pain points such as inadequate localization adaptation, insufficient safety protection, and high maintenance costs.Our box type substations strictly adhere to the "five-proof" standards, adopt high-quality anti-corrosion materials and special surface treatment technology, ensuring a service life of more than 20 years; the internal structure is scientifically designed, with independent high-voltage switch room, transformer room, and low-voltage switch room, equipped with automatic temperature control system and microcomputer-based integrated protection devices, which not only realizes intelligent monitoring and safe operation, but also simplifies maintenance and capacity expansion. We flexibly configure oil-immersed transformers (or dry-type transformers according to user needs), SF6 gas or vacuum arc extinguishing switches, and high-voltage metering cabinets, and can customize the number of output lines and appearance colors to meet the individual needs of residential communities, industrial and mining enterprises, public buildings and other scenarios. Chenghe Electric Power always adheres to the concept of "quality first, customer-oriented", providing one-stop services from product design, production and manufacturing to after-sales maintenance, escorting the stable and efficient operation of your power system.

If you are interested in box-type substations, please feel free to contact us at any time. WhatsAPP:+8613395770101 Email:yuki@ningboziyao.com