The non-gap AC zinc oxide surge arrester is a new over-voltage protector with perfect performance. It is suitable for protecting electric equipment of AC system and avoiding the harm from over-voltage operation and lightning and has many advantages like, compact size, light in weight, anti-dust, burst-proof and easy installation and transportation etc. High quality composite zinc oxide arrester adopts the zinc oxide block inside, which has various merits like good steep wave response without following current and lower of operation residual voltage, less distribution of discharging, etc. High voltage post insulator has abilities of absorbing various lightning and operational over-voltages as well.