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25 Expelled parts( t5 b8 G1 o" D5 l* g
25.1 Where expelled parts could constitute a SAFETY HAZARD protective means shall be provided. Q" Y* a$ y2 S1 w& a: h' w3 t9 Y
Compliance is checked by inspection for the presence of protective means.
5 b% l) K- n/ Z; t25.2 A graphical display vacuum tube whose maximum face dimension exceeds 16 cm shall either be. C2 I/ K* ?" m ~% @, c, Q
intrinsically safe with respect to effects of implosion and to mechanical impact, or the ENCLOSURE of the
8 S! `/ B" Z# o1 k$ H$ u% O9 }EQUIPMENT shall provide adequate protection against the effects of an implosion of the tube.& }8 c9 P, ]9 _% e( q( a
A non-intrinsically safe tube shall be provided with an effective protective screen which cannot be3 ] K" k9 t7 \8 g' L
removed without the use of a TOOL; if a separate screen of glass is used, it shall not be in direct contact
0 s2 f! U* {6 `& t7 R" \$ jwith the surface of the tube.9 X4 l6 [. N0 w
The tube shall be tested as specified in IEC Publication 65, unless a certificate of the testing is provided. |
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