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我厂#2发电机(220MW)是哈尔滨电机厂生产的第36台机,1989年11月投产,先后经历了4次大修和预试检查,前3次大修前常规试验均未发现问题,1996年5月#2机按规定进行大修,5月2日对绝缘检查发现B、C相间绝缘明显偏低,A、B、A、C相间绝缘正常。我们及时请来了省中试所的工程技术人员,与我厂技术人员一起查找原因。虽然交、直流耐压试验均已通过,但B、C相间绝缘依然低,症结未找到。这一隐患成了
Our plant # 2 generator (220MW), the 36th machine produced by Harbin Electric Works, was put into operation in November 1989. It has undergone 4 overhauls and pre-test inspections in succession. No problems were found in routine tests before the 3 overhauls in 1996 May # 2 machine in May overhaul according to the provisions of May 2 on the insulation inspection found B, C phase insulation was significantly lower, A, B, A, C between the normal insulation. We promptly invited the pilot in the province of engineering and technical personnel, and I plant with the technical staff to find out the reason. Although AC and DC voltage withstand tests have been passed, but B, C phase insulation is still low, the crux can not be found. This hidden danger has become