国电南瑞取得自耦变压器公共绕组CT极性和相序校核方法及装置专利

Core Insights - The State Intellectual Property Office of China has granted a patent for a method and device for checking the polarity and phase sequence of public winding CTs in autotransformers to several companies including Guodian NARI Technology Co., Ltd. and State Grid Electric Power Research Institute [1][2] Company Summaries - Guodian NARI Technology Co., Ltd. was established in 2001 and is based in Nanjing, primarily engaged in software and information technology services. The company has a registered capital of 8032.09 million RMB and has invested in 42 companies, participated in 5000 bidding projects, holds 13 trademark registrations, 5000 patents, and possesses 181 administrative licenses [1][2] - State Grid Electric Power Research Institute was also founded in 2001 and is located in Nanjing, focusing on the manufacturing of instruments and meters. The company has a registered capital of 6085 million RMB, invested in 15 companies, participated in 678 bidding projects, holds 11 trademark registrations, 3230 patents, and has 23 administrative licenses [1][2] - Guodian NARI Nanjing Control System Co., Ltd. was established in 1993, located in Nanjing, and primarily provides professional technical services. The company has a registered capital of 1500 million RMB, invested in 1 company, participated in 5000 bidding projects, holds 2898 patents, and has 12 administrative licenses [2] - NARI Group Co., Ltd. was also founded in 1993 and is based in Nanjing, focusing on the manufacturing of instruments and meters. The company has a registered capital of 2000 million RMB, invested in 25 companies, participated in 5000 bidding projects, holds 31 trademark registrations, 3342 patents, and possesses 62 administrative licenses [2]