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25 Expelled parts! [/ G% C# d- r4 K
25.1 Where expelled parts could constitute a SAFETY HAZARD protective means shall be provided.3 T0 t7 Z! i! z8 j' p
Compliance is checked by inspection for the presence of protective means.
7 ~2 ]9 F/ I6 O7 a$ Z% z$ s; n* Y25.2 A graphical display vacuum tube whose maximum face dimension exceeds 16 cm shall either be7 p) t1 k* J9 d3 s5 ?) M+ V; ]
intrinsically safe with respect to effects of implosion and to mechanical impact, or the ENCLOSURE of the" G; ~' Y, D8 f4 k( S; b8 i+ C/ w; h
EQUIPMENT shall provide adequate protection against the effects of an implosion of the tube.
7 Q! o5 A3 B' ^$ W! v1 [5 }A non-intrinsically safe tube shall be provided with an effective protective screen which cannot be/ l7 f3 }1 ~# I
removed without the use of a TOOL; if a separate screen of glass is used, it shall not be in direct contact
# D) |5 i" y& J7 m6 X$ ewith the surface of the tube.: D5 I) P7 u2 A" C- f& v( j
The tube shall be tested as specified in IEC Publication 65, unless a certificate of the testing is provided. |
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