Market pushes high-voltage electrical technology innovation

Since the reform and opening up, China’s electrical industry has developed rapidly in the national economy, entered a new era of historical development, and made great progress in the production process. The following is a detailed introduction.

In the area of ​​high-voltage electrical appliances, SF6 technology, vacuum technology, and combination technology have been applied to the product structure, and basically achieved "oil-free". Processes have introduced the introduction of shell production lines, vacuum epoxy casting and injection molding equipment, machining centers, welding robots, cabinets with numerical control and plastic coating equipment. At present, domestic equipment with a voltage rating of 500kV and below has been able to meet domestic needs, and its technical parameters have approached or reached foreign advanced levels.

The low-voltage electrical appliance industry will first apply the computer technology and product structure to the high-pressure industry. Intelligent and networked products have been implemented, and intelligent low-voltage circuit breakers, motor controllers, overload relays, switch cabinets and other products have been introduced; in addition, domestic low-voltage electrical appliances in reliability studies, contactless switches, vacuum technology, current limiting Technology, zero arcing, high performance and miniaturization, composition, modularization, and modularization have all achieved encouraging results.

China's high-voltage switchgear has been developed into a metal-enclosed type (including armouring, spacing, and box type), and low-pressure is based on closed-pull type units. Various types of high-pressure trolleys, mid-mounted, RMUs, FC cabinets, cabinets, and low-voltage drawer cabinets, motor control centers and other products have been marketed in large quantities.

China's high and low voltage complete sets of equipment have all been equivalent or equivalent to IEC standards, and are also stricter than IEC standards in terms of their national conditions.

Many companies in the electrical industry in China have adopted advanced technologies such as CAD, CAPP, CAM, CAE, and MIS. Some key and key enterprises already have CIMS technology. It is worth mentioning that until the end of the 20th century, the whole electrical science theory has not yet reached a stage of maturity and perfection, whether it is domestic or foreign, especially for the establishment of the arc process and its mathematical model, remains to be further studied. The design of electrical products has some sporadic empirical formulas in addition to heat, electrical power, electrical contact, electromagnetic properties, etc., but in the final analysis, it is an analogy optimization and experiment method.