Cradle to Gate
Identity ID
f56fd36f-5709-45d2-bf7a-1e995f7f1e05
Materials
Associated ID
5a54312a-9d55-46e0-b4b4-f58a4d639412
Included activities starts
Included activities ends
Description
The product represented by this dataset is a vacuum circuit breaker, namely a mechanical switching device whose contacts open and close in a high-vacuum tube, with a single-unit weight of about 267.55 kg and a nominal voltage of 25 kV, mainly composed of a vacuum interrupter, an operating mechanism and a housing, etc., manufactured through processes such as steel machining, assembly and inspection. The key upstream raw materials of this product are steel, stainless steel and parts and components such as silica gel, ceramics and electronic components, and the downstream is mainly applied to the control and protection of power systems and distribution networks. As for the system boundary, the packaging of the product and its post-delivery transport, use, scrapping, recycling and final disposal, as well as infrastructure such as the manufacture of production equipment and plant construction, are not included within the dataset boundary. In terms of data sources and data processing, the data inventory is formed by merging data from multiple sources.
Activity Description
The system boundary covers the vacuum circuit breaker from cradle to gate, starting with raw-material inputs and ending when the finished vacuum circuit breaker leaves the factory. The main stages, in sequence, are steel processing (steel, stainless steel, etc.), assembly (silicone rubber, ceramics, electronic components, etc.), and inspection.
Process Description
Circuit breaker refers to a mechanical switching appliance that can connect, carry and break current under normal circuit conditions, and can also connect, carry and break current under specified abnormal circuits (such as short circuits) for a certain period of time. It is mainly divided into air circuit breakers, vacuum circuit breakers, SF6 circuit breakers and plastic case circuit breakers. Vacuum circuit breaker refers to a circuit breaker whose contacts are opened and closed in a high vacuum tube. It is mainly composed of a vacuum arc extinguishing chamber, an operating mechanism and a shell. It is small in size, light in weight, suitable for frequent operations, and does not require maintenance for arc extinguishing. It is in the form of cabinet-mounted or bench-mounted switchgear and is widely used in the control and protection of distribution networks.
Time period
2022
2026
Geography
China
Macroeconomic value
Business-as-Usual
Data validation
Yes
Technology
Current Technology
Technology comment
The production of vacuum circuit breakers mainly includes steel processing, assembly and inspection. After the purchased steel is machined and surface treated, it is assembled with purchased parts, components, etc. on the equipment production line. After passing the inspection, the finished vacuum circuit breaker is obtained.