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U.2.2 Flexibility and adherence/ i6 |, q! e# B* `# d7 ]7 A f
Test 8 in 5.1.1 of IEC 60851-3 is applied using the mandrel diameters of Table U.1. The test& g6 K6 _- O2 O8 y+ h( W
sample is then examined in accordance with 5.1.1.4 of IEC 60851-3, followed by the test of 5.2.2( Y, Q- g6 S3 T, s) {
of this standard except that the test voltage is applied between the wire and the mandrel. The* }8 e% B+ q9 D% G& T
test voltage shall be not less than the appropriate voltage in accordance with 5.2.2 of this
) H. P8 Q. L* T- k( V5 tstandard, with a minimum of$ J+ Q6 {: M7 S& L0 z* M
– 1 500 V a.c. r.m.s. for BASIC INSULATION or SUPPLEMENTARY INSULATION, or- _ g c* n3 n! p, @9 O
– 3 000 V a.c. r.m.s. for REINFORCED INSULATION.
: L% ?" N: x% ?, @The tension to be applied to the wire during winding on the mandrel is calculated from the wire
% j2 Z" G5 J) F/ e9 Idiameter to be equivalent to 118 MPa ± 10 % (118 N/mm2 ± 10 %). . u4 D: Z8 N @" {9 S4 H4 F! C, M4 D
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?; r( ]$ }( d/ }+ R5 C( @
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