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U.2.2 Flexibility and adherence% D; G6 j2 ?' _! v+ F) [8 C, ?
Test 8 in 5.1.1 of IEC 60851-3 is applied using the mandrel diameters of Table U.1. The test4 P4 q% y A6 x2 E
sample is then examined in accordance with 5.1.1.4 of IEC 60851-3, followed by the test of 5.2.2
! ~" N2 H) ]+ }. Aof this standard except that the test voltage is applied between the wire and the mandrel. The/ F0 F* O+ s' P. o/ C' l
test voltage shall be not less than the appropriate voltage in accordance with 5.2.2 of this
8 b" W( i8 Q/ R4 ]standard, with a minimum of
# x1 m, Q/ q7 w9 }, A- M* c" z– 1 500 V a.c. r.m.s. for BASIC INSULATION or SUPPLEMENTARY INSULATION, or
& G9 L, P9 }; i3 r– 3 000 V a.c. r.m.s. for REINFORCED INSULATION.- {9 w7 c# y0 D4 u
The tension to be applied to the wire during winding on the mandrel is calculated from the wire- K! C; Z" r* B. l
diameter to be equivalent to 118 MPa ± 10 % (118 N/mm2 ± 10 %).
1 m6 k3 h# X2 q' r2 D' P) n4 {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?
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