MS 1445 Pt.3-1998

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标准号:MS 1445 Pt.3-1998
发布日期:1998/1/1 12:00:00
实施日期:1999/12/31 12:00:00
适用范围:This Standard gives requirements for 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 signaling 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 nominal voltage for system.Unskilled persons normally have access to these assemblies, e.g. for switching operations and for replacing fuse-links.

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