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U.2.2 Flexibility and adherence0 V4 _) _0 P+ U! k I
Test 8 in 5.1.1 of IEC 60851-3 is applied using the mandrel diameters of Table U.1. The test1 _2 C4 y+ E) c0 G
sample is then examined in accordance with 5.1.1.4 of IEC 60851-3, followed by the test of 5.2.2 `. \- C( ~" S( p: i
of this standard except that the test voltage is applied between the wire and the mandrel. The7 K5 p& x2 k+ M9 Z, l/ s
test voltage shall be not less than the appropriate voltage in accordance with 5.2.2 of this
% ]/ q9 o) b. b* f( pstandard, with a minimum of4 u' K8 K& f# `/ B
– 1 500 V a.c. r.m.s. for BASIC INSULATION or SUPPLEMENTARY INSULATION, or
9 t1 g& F( b) l7 g) t– 3 000 V a.c. r.m.s. for REINFORCED INSULATION.
+ |, @% m$ l: l1 a5 j1 W* O% qThe tension to be applied to the wire during winding on the mandrel is calculated from the wire
( ?6 j8 q1 o, v6 [diameter to be equivalent to 118 MPa ± 10 % (118 N/mm2 ± 10 %).
( r8 O! |' y2 R3 J4 W( E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?' I, _$ E8 X* ?
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