|
U.2.2 Flexibility and adherence
# d$ n2 {; w& {! I2 L' j0 fTest 8 in 5.1.1 of IEC 60851-3 is applied using the mandrel diameters of Table U.1. The test* L9 @! m3 d+ Y/ z" e) Q' J1 L
sample is then examined in accordance with 5.1.1.4 of IEC 60851-3, followed by the test of 5.2.2! ^; G' P% K9 h; ^0 [8 u
of this standard except that the test voltage is applied between the wire and the mandrel. The- w; p6 q; z6 I4 {; a
test voltage shall be not less than the appropriate voltage in accordance with 5.2.2 of this
& b% o9 l/ g r. \/ Q, w0 Fstandard, with a minimum of3 J ^" T, a0 W) m/ v
– 1 500 V a.c. r.m.s. for BASIC INSULATION or SUPPLEMENTARY INSULATION, or
& K+ x' g6 o" h. y% t( H– 3 000 V a.c. r.m.s. for REINFORCED INSULATION.3 X+ V* \2 P/ R7 w
The tension to be applied to the wire during winding on the mandrel is calculated from the wire
+ U# Q1 S# I3 y( G) @; v3 ?diameter to be equivalent to 118 MPa ± 10 % (118 N/mm2 ± 10 %).
# N: r Z& [2 K! k) t% a) }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?
- k' `! |' e. Z6 L$ B" M% X3 p8 \, r |
|