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25 Expelled parts
: U3 H1 N t9 t, R! B2 i25.1 Where expelled parts could constitute a SAFETY HAZARD protective means shall be provided.: W! S8 I! O; r- Y# X, j6 ?
Compliance is checked by inspection for the presence of protective means.8 Q: |# X5 ~7 L2 ?) b8 J; X
25.2 A graphical display vacuum tube whose maximum face dimension exceeds 16 cm shall either be5 L/ z1 X* \* k1 `. e+ e; W
intrinsically safe with respect to effects of implosion and to mechanical impact, or the ENCLOSURE of the7 [9 l' D0 N- }6 c4 H6 H
EQUIPMENT shall provide adequate protection against the effects of an implosion of the tube.
0 q5 D$ ^/ d9 R1 yA non-intrinsically safe tube shall be provided with an effective protective screen which cannot be
, t( X& G& a$ m# r$ q9 Bremoved without the use of a TOOL; if a separate screen of glass is used, it shall not be in direct contact
, R8 I: A1 @4 ?" V' qwith the surface of the tube.
6 e) ]7 \: N' aThe tube shall be tested as specified in IEC Publication 65, unless a certificate of the testing is provided. |
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