标题: 过压等级是怎么分类的 [打印本页] 作者: 诗心竹雨 时间: 2011-11-23 01:51 标题: 过压等级是怎么分类的 It is permitted to use either the requirements of 2.10.3 for Overvoltage Category I or
Overvoltage Category II, using the PEAK WORKING VOLTAGE; or the requirements in Annex G for
Overvoltage Category I, Overvoltage Category II, Overvoltage Category III or Overvoltage
Category IV, using the REQUIRED WITHSTAND VOLTAGE, for a particular component or
subassembly or for the whole equipment.
For equipment to be supplied from an AC MAINS SUPPLY, the value of the MAINS TRANSIENT
VOLTAGE depends on the Overvoltage Category and the AC MAINS SUPPLY voltage. In general,
CLEARANCES in equipment intended to be connected to the AC MAINS SUPPLY shall be
designed for Overvoltage Category II.