Line-type metal oxide arrester
Line type gapped arresters have two different characteristics compared to power station type gapless arresters:
Line-type arresters protect line insulators, so the residual voltage of the arrester can be increased, which is beneficial to reducing the operating overvoltage current through the arrester.
Line-type arresters are installed on line pole sections, and their performance cannot be tested at ordinary times. A disconnection device must be provided to achieve maintenance-free.
10-110kV line-type metal oxide arrester has a unique disconnection device. The arrester is connected to the conductor through a disconnector. The detachment device consists of the core component - the thermal explosion detachment device and other components. Under normal circumstances, the arrester passes lightning current and operating overvoltage current, and the disconnector does not operate. Under abnormal circumstances, when the arrester fails and is damaged, the disconnector device can reliably operate to automatically separate the arrester from the conductor, ensuring uninterrupted power supply and maintaining sufficient insulation distance between the conductor and the arrester. (The technical parameters are the same as the previous gapless zinc oxide arrester)
Disconnector
The thermal explosion disconnector passed the action load test (4/10uS 100kA followed by secondary line discharge) and the 2mS 400A square wave test, proving that the disconnector does not operate when the arrester is working normally.
