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25 Expelled parts& ?6 _4 { a5 P- j9 s- x
25.1 Where expelled parts could constitute a SAFETY HAZARD protective means shall be provided.% w8 A+ x5 m+ @2 H+ v& N( F
Compliance is checked by inspection for the presence of protective means.; W8 r6 c- h4 a/ B! G0 t. y" L7 H
25.2 A graphical display vacuum tube whose maximum face dimension exceeds 16 cm shall either be/ F+ s- F/ |0 l$ ?3 ?
intrinsically safe with respect to effects of implosion and to mechanical impact, or the ENCLOSURE of the
* z- u4 a+ f6 u+ J4 uEQUIPMENT shall provide adequate protection against the effects of an implosion of the tube.
3 S" A5 M1 R4 S1 q0 C4 OA non-intrinsically safe tube shall be provided with an effective protective screen which cannot be
0 M1 q2 {+ I5 v* J. h2 C$ u* Jremoved without the use of a TOOL; if a separate screen of glass is used, it shall not be in direct contact
# A) `7 Y0 g( r+ Xwith the surface of the tube.
4 U! j3 {4 s+ c x( U+ u) V7 a! TThe tube shall be tested as specified in IEC Publication 65, unless a certificate of the testing is provided. |
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