The cable joint is the most weakness of power system 'safe operation. So it is significant to inspect the temperature of cable joints on-line.
电缆接头是电力系统安全运行中的最薄弱环节，实时的掌握电缆接头的运行温度对电力系统的安全运行有十分重要的意义。
Consequently, pitting corrosion resistance of the welded joint declines obviously and pitting preferentially occurs at ferrite phase in the high temperature HAZ near the fusion line.
焊接接头的耐点蚀性能明显下降，点蚀优先发生在高温热影响区所在的铁素体晶粒内。
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