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本帖最后由 qij1979 于 2018-4-8 15:23 编辑
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5.3.1.2
2 D1 A) U4 D$ u4 Z& D2 Q( [' QReplace the first dashed list item with the following new text:
8 ~" t2 s/ S3 c9 R& y/ C2 R– the minimum cross-sectional area may be less than 0,4 mm2 if overheating of the wire 5 Y3 S, _- |5 b( h8 c
conductor insulation is prevented under normal and short circuit operating conditions in
% b# c' y$ Z4 l/ Y$ [* Laccordance with the tests of 5.4;
$ C* C$ M' ^ A) p$ D" [Add, at the end of 5.3.7, the following new Clause 5.4:
& `3 O) b- w6 O4 Q: |/ s: ~5.4 Test to determine suitability of conductors having a reduced cross-sectional area
* z% @6 |3 f- n/ P Q0 rTo determine suitability of conductors having a reduced cross-sectional area, connected to
' J" O! k. X# B/ @' p0 o' fcontrolgear that limits the current to 2 A, the following test shall be conducted: ) p' r/ B; x$ C# a t
a) disconnect the conductors being evaluated as close as practical to the lights source in the
9 e/ f) m4 \: @/ X6 `luminaire and attach a resistive load using minimum 1 mm2 cross section test leads; these
3 p) a7 L$ K6 {1 ^% rleads shall be routed out of the luminaire in a manner that will have the least impact on% h8 [9 Q% C3 @# }
temperatures within the luminaire; * Y; A7 a3 D9 F; s9 M9 g6 D. c
b) adjust the resistive load to measure the maximum output current of the control gear,
2 c' V4 B w3 D2 |4 b- c1 emaximum measured current shall not exceed 2,5 A; ! E& R' N! N& p, T
c) with the resistive load set to draw maximum output current, conduct the thermal test in
! s5 \2 R7 _; Raccordance with 12.4. (see Figure 33); $ Y# J+ q1 z$ K# T. G7 a
d) the resistive load is then set to 0 Ω (short circuit) and the thermal test repeated in
- A5 T1 X9 r4 W4 L1 z/ P5 Z2 Q9 m: xaccordance with 12.4 (see Figure 33);
6 ~/ S9 W! b' ~2 c) w/ a! F3 [In no case shall the temperature of the luminaire wiring insulation exceed the limits stated in& [; I$ `4 X/ }# d) ^1 g) U. i, a0 v
Table 12.2 nor shall there be any indication of damage to luminaire wiring. : i; V+ e9 n/ t X, H
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