On December 22, Pinggao Group Co., Ltd. held a new product (new technology) appraisal meeting in Beijing in 2018. The six new products (new technologies) independently developed by the group were appraised by the China Machinery Industry Federation. More than 30 experts from Tsinghua University, Xi'an Jiaotong University, Shenyang University of Technology, State Grid Co., Ltd. and China Southern Power Grid Corporation attended the appraisal meeting.
After the expert review, "LW10B-1100/Y4000-63 sulphur hexafluoride circuit breaker" "ZKYN1-12 (G) / D2000-20 DC metal-enclosed switchgear" two leading technical standards; "TD64-126/ The overall performance of the 2500-40 (VI126400) vacuum interrupter and other international achievements is internationally advanced.
In 2018, Pinggao Group adhered to the high-end technology leadership and successfully developed a 1100 kV SF6 circuit breaker for the filter bank in the UHV field. This product requires a very low probability of heavy breakdown and is first proposed. The 5-cycle electric life breaking requirement, the product has passed the full type test, and won the bid for Linyi Station and Guquan Station. In the field of high voltage, the 126 kV vacuum interrupter developed by the group has filled the technical gap of the State Grid Co., Ltd. in the high-voltage vacuum interrupter; the self-developed environmentally friendly 126 kV high-voltage circuit breaker uses a 126 kV single-break The vacuum interrupter is used as the main breaking unit, and the arc insulation outdoor insulation achieves zero emission of greenhouse gases.
In terms of distribution network technology, ZKYN1-12(G)/D2000-20 DC metal-enclosed switchgear is a new intelligent DC distribution network switch based on the research results of DC switch technology. Different from the previous AC isolation switchgear, this product can realize fast automatic opening in 5 milliseconds, with complete control and protection function, and has good interaction with the upper control system; ZKN1-1.8/D4000-80 (PGDB-1800) The type DC circuit breaker is the first DC circuit breaker for rail transit with independent intellectual property rights in China; the PGDA-1800/D4000-80 DC switchgear is the first rail transit DC cabinet developed in China from the main components to the complete machine. .
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