The protection reliability of the zinc-oxide arrester and that of the type FZ-35 valve attester have been calculated respectively, When any one of the two devices is adopted in substation.
并分别计算了变电所内采用氧化锌避雷器和FZ-35型避雷器保护时变电所的可靠性；
2
If the vibration is caused by the occurrence of shock in the piping system it can be avoided if a properly sized water hammer arrester is installed near the quick closure valve.