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EN60598-1：2004
: k/ `" n: m* G2 q4 S$ x& J4.9.2 Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical. h/ w% W/ T: [3 f$ O0 H' V
and thermal strength.
6 V0 k1 t" B: y- qCompliance is checked by inspection, by manual test and by the electric strength test in
4 B: a* ^! r7 c l" L- t) E' oaccordance with section 10. The thermal properties of wire and sleeve are checked in9 ]/ S9 F; a7 N2 O$ a
accordance with section 12. Heat resistant sleeves used as covering for wires attaining a# P$ `8 E; h" h0 ?6 z
temperature exceeding the values given in Table 12.2 of section 12 shall comply with the, u, T6 T* Y$ _# x% p, ~* s
requirements of IEC 60684, taking into account the temperature measured on the wire in+ T. G6 J9 V [5 |* z2 e
question. The sleeve shall be resistant to a temperature exceeding the temperature( Y8 X5 q" a! K. [7 }
measured on the wire by 20 °C or withstand the following test:5 A/ V7 P% x s6 D H/ D: }
a) Three test specimens of the sleeve, about 15 cm in length, are subjected to the humidity
8 t9 A% N. M" q/ y1 T3 e4 mtest of 9.3 and subsequently to the insulation resistance and electric strength tests
. c; d2 r9 q! F9 Y. H+ l5 F3 N" [according to section 10. A suitable uninsulated copper conductor or metal rod is passed3 I( F2 `+ @" q1 [+ V
through the specimens, and the outside is covered by a metal foil in such a way that no* n# p% Q" {7 [' ?$ |7 ]
flashover at the ends of the samples can occur. The measurement of the insulation' L0 a8 x( Z: l$ T: y
resistance and the electric strength test is then made between the copper
' J) f$ I1 }8 N/ cconductor/metal rod and the metal foil. v, `9 G: ]' K$ E$ @ L
b) After the copper conductors/metal rods and metal foils have been removed, the
# L" i5 y5 x5 }1 Bspecimens are placed in a heating cabinet for 240 h at a temperature of T + 20 °C,- \0 {. [# E" j& n2 z
T being the measured temperature of the wire.
- [$ z& a5 y" h' Gc) The specimens are allowed to cool to room temperature and are then prepared as
2 H$ B' S R% z2 x, ]9 Y* Lindicated under item a) above., q, O: s# B$ X
Measurement of the insulation resistance and electric strength is then made between the
1 W Y, j0 o5 X. ycopper conductor/metal rod and the metal foil.
0 ] w* s( g8 G/ tCompliance is checked by the insulation resistance values and test voltages specified in
# j# z( g+ G7 {& PTables 10.1 and 10.2 in section 10.* N' e F8 K0 T$ L8 r6 B
: }* b7 _: o# f9 R. q问：是否只要套管的耐热温度高于电线实测温度20 °C，就不需要做电气强度测试。还是任何套管都要经过相应的电气强度测试，以满足Insulated linings, sleeves and similar parts shall have adequate mechanical, electrical，and thermal strength. |
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