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请看标准中的定义:8 N/ H3 S7 U+ U' R* i* K: X
supplementary insulation {# G7 j4 ]9 e2 r- k
independent insulation applied in addition to basic insulation in order to provide protection against electric shock in the event of failure of the basic insulation9 [, [$ o+ \* a6 C5 D+ ?1 v
[IEC 61140, definition 3.10.2, modified]9 \) R( K7 E. E. U& |/ J4 k
& |: l% T# p, f2 Z2 Xreinforced insulation
9 ^3 a6 D. @0 y; x |) J/ esingle insulation system applied to hazardous live parts, which provides a degree of protection against electric shock equivalent to double insulation1 |, H- ~& w& V' k4 n6 {9 [/ G
NOTE The term "insulation system" does not imply that the insulation is one homogeneous piece. It may comprise several layers which cannot be tested singly as supplementary or basic insulation. |
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