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|  DSH 508 \6 G. x3 Z* d2 M/ j6 s! m
! [# v+ D/ x, T. A$ w | Moisture resistance
# E$ v/ I9 B [: l3 H q | 15.1.2! K' ~! ?" d. B$ R8 _8 ]
| 60335-1(ed.3)* U' M+ G- S' Y9 k. x. [! h
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% o: U0 Y" Q/ ~8 t; _Question:
# u- r/ i$ B3 a& `* d4 xWhat are the test conditions for appliances that are normally ceiling mounted ?% }. P& @9 v/ D" g9 k* U6 O$ }$ b
Rationale:; C! w, s& |4 K
See question.
5 r5 a" P: e# f4 m( `1 uDecision:
/ {- `7 j f. G6 e& L# @Ceiling mounted appliances are mounted in accordance with IEC 60335-1/1991, sub-clause! H! P$ j" C# m8 h* I/ Z; Q: Q: Y
15.1.2, as for appliances fixed to a wall. Ceiling mounted appliances are mounted in their$ |7 n* ]9 o5 a$ D+ e: k0 o, M" S
operating position. The rear part shall be covered and sealed around the mounting plate.3 W7 M: s, d' _3 \- k$ [) D! |
The requirements for IPX4 are checked in accordance with IEC 60529, sub-clause 14.2.4.7 d9 {5 \/ x4 y. L( c b' X' `) B
The requirements for IPX3 are checked in accordance with IEC 60529, sub-clause 14.2.3,
8 p3 y/ \4 k) P; vbut the oscillating tube is oscillated as for IPX4, detailed in IEC 60529, sub-clause 14.2.4.5 f0 ?) ]! F8 A, u. y# i( I- ]0 C
Alternatively, IPX3 and IPX4 requirements can be made using figure 5 of IEC 60529.
0 i# R0 n! _6 T9 J$ Q) c. I9 ~IPX2 requirements are not applicable for ceiling mounted appliances.
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发表于 2012-9-9 17:23
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