BS EN 60439-1: 1994 : Specification for Low-voltage switchgear and controlgear assemblies — Part 1. Specification for type-tested and partially type-tested assemblies
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This International Standard applies to low-voltage switchgear and controlgear assemblies (type-tested assemblies (TTA) and partially type-tested assemblies (PTTA)), the rated voltage of which does not exceed 1 000 V a.c. at frequencies not exceeding 1 000 Hz, or 1 500 V d.c.
This standard also applies to assemblies incorporating control and/or power equipment, the frequencies of which are higher. In this case, appropriate additional requirements shall apply.
This standard applies to stationary or movable assemblies with or without enclosure.
BS EN 60439-1: 1994 : Specification for Low-voltage switchgear and controlgear assemblies — Part 1. Specification for type-tested and partially type-tested assemblies