標(biāo)準(zhǔn)號：SIS SS-EN 60 439-3-1991
中文標(biāo)準(zhǔn)名稱：工業(yè)用低壓成套開關(guān)設(shè)備和控制設(shè)備．第3部分：打算安裝在讓非熟練人員有機(jī)會使用的地方的低壓成套開關(guān)設(shè)備和控制設(shè)備組件的特殊要求
英文標(biāo)準(zhǔn)名稱：Low-vo/tage switchgear and controlgear assemblies — Part 3: Particular requirements for low-voltage switchgear and controlgear assemblies intended to be installed in places here unskilled persons have access for their use
發(fā)布日期：1991/12/4 12:00:00
實施日期：1999/12/31 12:00:00
適用范圍：Replace the second note by:This standard gives supplementary requirements for such enclosed distribution boards (DBU), which are stationary, type tested assemblies (TTA) for indoor use, containing protective devices and intended for use either in domestic (household) applications or in other places where unskilled persons have access for their use. Control and/or signalling devices may also be included. They are for use on a.c, with a nominal voltage to earth not exceeding 300 V. The outgoing circuits contain short-circuit protective devices, each having a rated current not exceeding 125 A with a total incoming load current not exceeding 250 A.NOTE - The nominal voltage to earth in an IT system is taken as the nominal voltage of the system.Unskilled persons normally have access to these assemblies, e.g. for switching operations and for repiacing fuse-links.Requirements for assemblies for outdoor use are under consideration.