The ceramic seals further realize hermetic sealing with a ceramic cap of posterior part. 陶瓷塞与后部的陶瓷帽实现进一步的气密封接。
The methods of ceramic cap and pin insulator monitoring such as spark gap detecting voltage distribution testing, insulation resistance measurement, aerosurveying and ground surveying were reviewed. 讨论了检测盘形悬式瓷绝缘子的火花间隙法、电压分布法、测量绝缘电阻法、航测法和地面初判法。