|
25 Expelled parts9 g! _- {6 y' O5 i7 v' ?9 I
25.1 Where expelled parts could constitute a SAFETY HAZARD protective means shall be provided.
& o4 Z; T V; K/ ^! hCompliance is checked by inspection for the presence of protective means.
; Z& H4 V! y8 c! P7 n25.2 A graphical display vacuum tube whose maximum face dimension exceeds 16 cm shall either be4 ^7 J" W! ~, _, y1 P( j/ a
intrinsically safe with respect to effects of implosion and to mechanical impact, or the ENCLOSURE of the: g/ g! P) C: B* j
EQUIPMENT shall provide adequate protection against the effects of an implosion of the tube.( ]! a, x# I, w( \: l' i8 M" Q
A non-intrinsically safe tube shall be provided with an effective protective screen which cannot be( ]& N1 }# E% U# r
removed without the use of a TOOL; if a separate screen of glass is used, it shall not be in direct contact
! z0 q" |# G! Gwith the surface of the tube.
, a2 q/ b& B5 j CThe tube shall be tested as specified in IEC Publication 65, unless a certificate of the testing is provided. |
|