作用于轿厢和对重的上行超速保护装置的比较

Comparing the Ascending Car Overspeed Protection Means Acting to the Car with It Acting to the Counterweight

GB7588—2003《电梯制造与安装安全规范》第9．10．4条规定的上行超速保护装置4种作用方式中的a）、b）两种作用方式均为采用安全钳系统，这里针对这两种作用方式的保护装置从优劣性、制停工况、制停力、平均制停减速度、日常检验的试验工况、作用于同一地方但用途不同的安全钳系统等方面进行比较分析，找出两者的区别。

According to the clause 9.10.4 a） and b） of GB 7588-2003 ＂Safety rules for the construction and installation of electric lifts＂, this paper compares the ascending car overspeed protection means acting to the car with it acting to the counterweight from its virtues and defects, stopping case, stopping force, retardation and daily test,etc.