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U.2.2 Flexibility and adherence0 j. ^: \" W) y8 X$ W
Test 8 in 5.1.1 of IEC 60851-3 is applied using the mandrel diameters of Table U.1. The test0 N; k1 b) K8 V- Q0 j6 ~3 r
sample is then examined in accordance with 5.1.1.4 of IEC 60851-3, followed by the test of 5.2.29 g( `1 P7 Q2 x0 y8 \2 L
of this standard except that the test voltage is applied between the wire and the mandrel. The
1 ?0 s+ O/ `( B9 ltest voltage shall be not less than the appropriate voltage in accordance with 5.2.2 of this
* L' V/ @2 R" B0 b! @standard, with a minimum of
; W: Z3 f7 K. p– 1 500 V a.c. r.m.s. for BASIC INSULATION or SUPPLEMENTARY INSULATION, or
* ?$ N$ }1 f/ L' b3 R5 \" c; C1 {– 3 000 V a.c. r.m.s. for REINFORCED INSULATION.# m+ {6 c- o8 s$ @+ N
The tension to be applied to the wire during winding on the mandrel is calculated from the wire2 V' Y, q8 y, H. x
diameter to be equivalent to 118 MPa ± 10 % (118 N/mm2 ± 10 %).
" I' T# |3 e" _3 u, q6 W导线和缠绕棒是圆,按理论上来说,圆与圆缠绕是点与点接触,那么压强怎么算?: W) N3 |: e$ n$ G# n9 L
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