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2.7.3 Short-circuit backup protection(EN60950 2.7.3) j2 H) [: o/ O: F1 P
Unless appropriate short-circuit backup protection is provided, protective devices shall have
6 Z; A( i* p3 [3 F0 Radequate breaking (rupturing) capacity to interrupt the maximum fault current (including shortcircuit
9 l4 Y) W, r1 C, ncurrent) which can flow.) Z9 I9 U; G& ` b+ d; d- b
For PERMANENTLY CONNECTED EQUIPMENT or PLUGGABLE EQUIPMENT TYPE B, it is permitted for
, G" Z0 c1 l+ c/ Gshort-circuit backup protection to be in the building installation.
$ w, I+ X; [1 m* DFor PLUGGABLE EQUIPMENT TYPE A, the building installation is considered as providing shortcircuit, S' n" [6 ^( `
backup protection
# h1 W+ K- f' ?' ^3 W& }8 y除非具有适当的短路后备保护装置,保护装置应当具有足够的分断(遮断)能力,能切断可能
' i( O, C. `; H# A- o6 l流过的最大故障电流(包括短路电流)。
( J2 y8 J& [) h: H4 {1 e对永久性连接式设备或B型可插式设备,允许在建筑设施中提供短路后备保护装置。) S: |: n; t$ c& j) f; i0 B# S
对于A型可插式设备,可认为建筑设施提供了短路后备保护
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按这句话的意思是,设备可以不用保险丝,但仍然不是很确定,望高手解答 |
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