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参考(IEC60598-1 4.21)
, Q* a, [: T# W" o \6 P6 R+ E1 S Z/ [
4.21 Protective shield/ ]! h2 ]) F$ X: K& a& A/ d: h
& P$ [ ~4 S4 Y2 T; k* o5 M( a; w
4.21.1 Because of the possible risk of lamp shattering, luminaires designed for tungsten halogen lamps and luminaires designed for metal halide lamps shall be fitted with a protective shield. For tungsten halogen lamps, the shield shall be of glass. Luminaires designed to be used with self-shielded lamps only are exempt from this requirement, but shall be marked with the appropriate symbol (see Figure 1).
* \2 ]' W7 {4 P. u: a9 V" ?; [8 {# ?NOTE 1 Lamps needing a protective shield as part of the luminaire construction are supplied with an appropriate
# A4 j7 H) r( ^+ ~cautionary notice or their packaging is marked with the symbol shown hereafter:6 g) {8 F. O, D( U- \8 z: h3 h
NOTE 2 For lamps not needing a protective shield as part of the luminaire construction (self-shielded lamps) their
) y$ J8 Y# \' ^packaging is marked with the symbol shown hereafter:5 k. X4 R. V6 P4 Y2 }, a0 E& S6 C
; w/ R1 h( X; \, M9 E2 a2 y4 C
4.21.2 Parts of the lamp compartment shall so be designed that particles from a shattering
5 z5 ^$ U* p) ^3 p6 Y# \; ~lamp cannot impair safety.
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) W3 V5 ^; W4 N" ~0 v4.21.3 All openings in the luminaire shall be such that no parts of a shattered lamp can leave( K u# |. P; }
the luminaire by a direct path (direct line of sight), including the rear of recessed luminaires.3 a6 l) t0 e& m! b, F# ^# C
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& b/ p: ?) F* ?' Q6 o8 a4.21.4 Compliance with 4.21.1 to 4.21.3 is checked by inspection and by the following tests:
& k! O2 i Y. p T- I/ U" i– the protective shield shall comply with the impact test of 4.13.1 with the impact energy of
1 l" p! g% r4 _+ q' t- s! WTable 4.3 for fragile parts;
% O8 z3 _& x: W2 Y5 t0 k– parts of the lamp compartment, if of insulating material, shall comply with the resistance to4 ~, D6 X! G# { l0 @: G
flame and ignition test of 13.3.2.. l: k( E0 R# G9 p: m& `% M' E; t
NOTE 1 This requirement is intended to improve safety by eliminating the hazards due to chance failure of a lamp
o+ ]/ ~/ H4 |9 x6 D; vor incorrect application. Existing open luminaires not fitted with a protective shield do not necessarily present a
: h7 N5 Z! G8 F3 Ohazard.
* P4 ?- c: t4 xNOTE 2 The impact test of 4.13.1, which is performed from the outside, is regarded to be more severe than the w2 ^2 P* S7 l, c( N! e) {
impacts of glass particles. A specific test simulating the latter is therefore not necessary. In case the mounting7 O' `: N0 x9 A# x9 ]1 W8 W
means of the glass shield is solely designed to withstand impacts from the inside, the test of 4.13.1 should be5 L' m6 n* ^) \; j
performed in that direction. |
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