【文章內(nèi)容簡介】 s ........................................................................................................ 32 Annex ZZ (informative) Coverage of Essential Requirements of EC Directives ......................................... 34 Page 4 EN 60079–18:2020 Figure 1 – Distances between free surface of pound and ponents or conductors .................................................................................................................................................. 14 Figure 2 – Distances between the wall or the free surface of the pound and the ponents or conductors ......................................................................................................................... 15 Figure 3 – Distances between the wall or the free surface of the pound and the ponents or conductors ......................................................................................................................... 16 Figure 4 – Minimum distances for multilayer printed wiring boards........................................................... 18 Figure – Basic requirements for pounds for ―m‖ apparatus. .......................................................... 29 Figure – Test procedure during thermal cycling test ............................................................................ 31 Table 1 – Distances through the pound ............................................................................................... 12 Table 2 – Minimum thickness of pound from free space ..................................................................... 13 Table 3 – Thickness of pound between the free surface of the pound and ponents or conductors ......................................................................................................................... 14 Table 4 – Thickness of the pound between the wall or the free surface of the pound and the ponents or conductors........................................................................................... 15 Table 5 – Thickness of the pound between the wall or the free surface of the pound and the ponents or conductors........................................................................................... 16 Table 6 – Minimum distances for multilayer printed wiring boards ............................................................ 17 Table 7 – Permissible primary cells ............................................................................................................ 20 Table 8 – Permissible secondary cells ....................................................................................................... 20 Table 9 – Test pressure .............................................................................................................................. 27 Table – Allocation of test samples........................................................................................................ 30 Page 5 EN 60079?18:2020 ! $ % amp。 39。 ( )* ( * * + .%/ + + ** * This part of IEC 60079 gives the specific requirements for the construction, testing and marking of electrical apparatus, parts of electrical apparatus and Ex ponents with the type of protection encapsulation ―m‖. This part of IEC 60079 only applies for encapsulated electrical apparatus, encapsulated parts of electrical apparatus and encapsulated Ex ponents (hereinafter always referred to as ―m‖ apparatus) where the rated voltage does not exceed 10 kV with a relative tolerance of +10 %. This standard supplements the general requirements in IEC 600790. 2 4 % 。 ( The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IE C 600790:?, IE C 600797:2020, IE C 6007911:1999, !! IE C 6007926:?, $ % amp。 39。 IE C 600861, ( ! IE C 60127 (all parts), ) IE C 602431, * ! * + IE C 60622, , ( amp。 , amp。 ( Page 6 EN 60079?18:2020 IE C 606641:1992, + + ! % Amendment 1 (2020) Amendment 2 (2020) IE C 60691, * amp。 . IE C 61150, / amp。 ( , amp。 ( ( ( ( IE C 6155826 , , + % + IE C 619511, , ( a amp。 ( ( ! 0 amp。 IE C 619512, , ( a amp。 (