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2.10.5 Solid insulation
( @' {" B1 |0 \* U5 ?8 v1 W2.10.5.1 General e; q4 R7 u5 J3 ~) `6 |4 R, ~
In 2.10.5, the requirements for SOLID INSULATION (except those for thin sheet material) and for+ j/ h+ `4 T) M9 G3 U) B
insulating compound also apply to gel materials, used for this purpose.
. L0 I e. _+ Q: NSOLID INSULATION shall be:
4 T; b% |. w$ [# D− so dimensioned that overvoltages, including transients, that enter the equipment, and) C/ Z# o4 ^6 U
peak voltages that may be generated within the equipment, do not break down the SOLID
" S1 n. t x8 T; eINSULATION; and3 M9 J, A! @. Z
− so arranged that the likelihood of breakdown occurring due to the presence of pinholes in- N# D8 w7 k3 `. g1 |
thin layers of insulation is limited.7 \+ k- T4 P/ `+ k O. @
Solvent-based enamel is accepted only on winding wire as described in 2.10.5.13.
% c' x% h, `# m7 h+ sExcept for printed boards, SOLID INSULATION shall either
6 D# I: B# }4 ?( g" J' ^− comply with minimum distances through insulation in accordance with 2.10.5.2; or( H% h( A) l9 z2 Y, @8 ~
− meet the requirements and pass the tests in 2.10.5.3 to 2.10.5.13, as applicable.
0 |' R! y, X$ G8 [( ]+ W3 }- H- LNOTE 1 For printed boards, see 2.10.6.+ _, n; [4 u! a: l+ S
NOTE 2 For SOLID INSULA TION on internal wiring, see 3.1.4.
4 I% l/ Y4 e( @Compliance with the requirements of 2.10.5.2 to 2.10.5.14 for the adequacy of SOLID
- |3 U2 \$ B4 |- A/ [- bINSULATION is verified by inspection and measurement, taking into account Annex F, by the
8 }+ g8 p! p! W. \( felectric strength tests of 5.2 and by any additional tests required in 2.10.5.4 to 2.10.5.14.: H, y! A$ j. j; g, p2 q/ o |& Q
2.10.5.2 Distances through insulation
( ?3 t2 }7 o- t7 ?, a! b7 uIf a design is based on distances through insulation, these distances shall be dimensioned
# ~& H! w# l% D* H) W) Daccording to the application of the insulation (see 2.9) and as follows (see Figure F.14):8 o4 \* m) } n! [+ q1 v2 M
− if the PEAK WORKING VOLTAGE does not exceed 71 V, there is no requirement for distance
9 q* K9 |$ D/ e' W( u; f( T8 Othrough insulation;
3 V& g' c+ w+ V) G* K− if the PEAK WORKING VOLTAGE exceeds 71 V, the f ollowing rules apply:/ X' P! f( x8 b1 H9 }
• for FUNCTIONAL INSULATION and BASIC INSULATION there is no minimum distance through0 p5 w- V# R$ [
insulation;' Z2 ?" @6 a! C) n
• SUPPLEMENTARY INSULATION or REINFORCED INSULATION shall have a distance through7 o+ D( M4 B2 e% L$ }
insulation that is 0,4 mm or greater, provided by a single layer.
4 ~6 D* P6 {. x! r$ u. TFor compliance criteria, see 2.10.5.1. |
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