本标准涵盖了封闭式低压交流电源电路保护器的试验程序。 注？在本标准中，术语a？电路保护器？应被视为是指a？封闭式低压交流电源电路保护器，a？除非有其他描述性术语限定。

This standard covers the test procedures for enclosed low-voltage ac power circuit protectors. NOTE — In this standard, the term "circuit protector" shall be considered to mean "enclosed low-voltage ac power circuit protector," unless qualified by other descriptive terms.