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dengwx 发表于 2013-6-22 09:05  ) l) }; g/ ~1 q4 X7 h
反问，怎么判定产品是否需要防火型外壳呢？
8 J7 `" _ F, U/ I5 B: |8 |下面这些都需防火外壳：
- I3 u# ]# v( H: _: X$ Y* ^/ F– components in PRIMARY CIRCUITS;
+ V: O" ?3 s0 n+ E– components in SECONDARY CIRCUITS supplied by power sources that exceed the limits
1 n% E% s- ?& @specifie in 2.5;
. O0 O; w0 K! F1 _. ?, R– components in SECONDARY CIRCUITS supplied by limited power sources as specifie in
) L5 N' E' K D1 x- q2.5, but not mounted on material of V-1 CLASS MATERIAL;
3 ^6 I9 C9 H2 I0 H' T– components within a power supply unit or assembly having a limited power output
! K4 V, Y2 d8 L! }" j& p3 A( yas specifie in 2.5, including overcurrent protective devices, limiting impedances,
# W7 p' ?( n; U4 |0 Bregulating networks and wiring, up to the point where the limited power source output n8 V& [- b! k5 N
criteria are met;3 `: ~2 ~# ?4 C7 h
– components having unenclosed arcing parts, such as open switch and relay5 j0 c. D* w/ i, K
contacts and commutators, in a circuit at HAZARDOUS VOLTAGE or at a HAZARDOUS ENERGY- L9 c) c2 p. S; h8 Q
LEVEL; and
. O; n) D2 ]8 ^0 Q- k7 T1 n– insulated wiring. |
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发表于 2013-6-22 09:38
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