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U.2.2 Flexibility and adherence
$ U. S2 [* z0 U+ ?, e, BTest 8 in 5.1.1 of IEC 60851-3 is applied using the mandrel diameters of Table U.1. The test3 N4 Z5 k* B# e0 }% B# e5 m0 ~
sample is then examined in accordance with 5.1.1.4 of IEC 60851-3, followed by the test of 5.2.2+ t, |) u2 y: w1 f, G- y
of this standard except that the test voltage is applied between the wire and the mandrel. The
9 F. i0 w9 {' {% ztest voltage shall be not less than the appropriate voltage in accordance with 5.2.2 of this* |' q) K9 H; z8 v+ S: Z
standard, with a minimum of
5 ^0 c: z7 `- |2 G7 N( P– 1 500 V a.c. r.m.s. for BASIC INSULATION or SUPPLEMENTARY INSULATION, or, q) z) w9 b- O# i2 ]! L
– 3 000 V a.c. r.m.s. for REINFORCED INSULATION.
9 L- W+ p: o: e9 x- b2 R: a- C2 HThe tension to be applied to the wire during winding on the mandrel is calculated from the wire+ v. |) V* N( n9 U3 Y9 F
diameter to be equivalent to 118 MPa ± 10 % (118 N/mm2 ± 10 %).
( r. }! S( V9 U& s- ]* T/ c# @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?- T R9 y) c4 o9 u0 b Y
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