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Primary and Secondary Integrated Pole-Mounted Circuit Breaker (Enclosed Type)

A common-cabinet circuit breaker typically refers to a design in which multiple circuit-breaker units are integrated into a single shared cabinet. This design saves space and simplifies installation and maintenance. The structure of a common-cabinet circuit breaker is relatively complex, as it must accommodate several circuit-breaker units within the same cabinet while ensuring electrical isolation and thermal management between these units. Common-cabinet circuit breakers are often used in applications that require multiple circuit-breaker units to work together, such as substations or large-scale industrial facilities².

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Power Transformer

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35kV Substation-Type Lightning Arrester

Lightning arrester: An electrical device used to protect electrical equipment from the hazards of high transient overvoltages caused by lightning strikes, while also limiting the duration and often the magnitude of any follow-current.

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Isolating switch, fuse

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Box-type substation

A box-type substation, also known as a prefabricated substation or pre-installed substation, is a compact indoor or outdoor distribution device manufactured in a factory. It integrates high-voltage switchgear, distribution transformers, and low-voltage distribution units according to a specific wiring configuration. This innovative equipment organically combines functions such as transformer step-down and low-voltage power distribution into a single, fully enclosed, moisture-proof, rust-resistant, dustproof, rodent-proof, fireproof, anti-theft, heat-insulated, and mobile steel-structure enclosure. It is particularly well-suited for urban grid construction and renovation, representing a new generation of substations that has emerged following the traditional civil-engineered substations.

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Power Transformer

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High- and low-voltage complete switchgear

High- and low-voltage complete switchgear systems are modular electrical equipment clusters that cover both high-voltage (rated voltage > 1 kV, ≤ 35 kV) and low-voltage (rated voltage ≤ 1 kV) power distribution systems. Their core function is to achieve end-to-end management of electric power—encompassing “reception, conversion, distribution, control, and protection.” They serve as the “intelligent hub and neural network” of the power system, linking together all electricity-consuming scenarios, including power plants, substations, industrial enterprises, and civil buildings. These systems constitute the critical infrastructure that ensures the stable, safe, and efficient operation of the power grid.

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High and Low Voltage Complete Equipment

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