UL1598 15.2 Non-IC 温升测试问题

Mark.Li

广东安规检测
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! }, a  X3 X; J& X& }: `  请教各位下？UL1598 第15.2章节中的异常温升测试怎么理解？特别是15.2.6 求大师们解读下？
0 D% N4 T) E! m' c
15.2.3 For ceiling-mounted luminaires, the thermal insulation specified in Clause 19.16 shall be placed
8 g; @* {! P8 }around the luminaire in the test box as follows:
. S7 Z) P3 w8 a5 Z6 o(a) the initial depth of the thermal insulation shall be 100 mm (4 in) above the bottom of the
  r0 H* r/ ^  x) K! p' e, qtest box or 50 mm (2 in) above the lowest glass portion of the test lamp, whichever is higher;
(b) the initial depth of the insulation shall not exceed the height of the lamp compartment; and
4 c! d" Z9 d8 o' }(c) if more than one test iteration is required to achieve the results specified in Clause 15.2.7,
/ P6 H* N/ v, r5 L" A6 v2 T' o6 tan additional 50 mm (2 in) of thermal insulation shall be added for each successive iteration.
2 M4 N0 R6 E3 ZThe last increase in thermal insulation may be less than a 50 mm (2 in) increment, to ensure
that the maximum 216 mm (8.5 in) height requirement is not exceeded. For each additional
( c  c* y1 |5 v3 K, a4 jthermal insulation level, the test shall be restarted with all temperatures at room ambient.
% Q6 G. y1 f- i2 RSEPTEMBER 17, 2008 NMX-J-307/1-ANCE ¨ C22.2 NO. 250.0-08 ¨ UL 1598 151
15.2.4 For recessed wall-mounted luminaires, the thermal insulation specified in Clause 19.16 shall be
placed over a recessed luminaire mounted in the test wall so the topmost portion of the luminaire is under
* p+ P: w5 v4 D6 H- {( _6 s216 mm (8.5 in) of thermal insulation.
15.2.5 The test lamp type and wattage for:
; Z) w+ d. @; K, o! n6 F(a) an incandescent luminaire shall be as marked on the luminaire and as specified in Clause
8 |# |* _# r: e( h, E- f19.8 and Table 19.8.2; and
% ~$ k; Q, t5 E3 `1 g! \( K(b) an HID luminaire shall be as marked on the luminaire and ballast, and as specified in
Clause 19.8.
15.2.6 A luminaire shall be operated until the thermal protector trips or for a maximum of 7.5 h. If the
) z$ l6 }$ t8 p2 h5 `protector does not trip within 3 h, the test shall be repeated with an additional 50 mm (2 in) of thermal
insulation, until:
(a) the thermal protector trips within 3 h; or
(b) the temperature limits in Table 14.1.2 are exceeded; or
% S1 g& \* d# q+ Q2 V! l(c) the thermal insulation height is 216 mm (8.5 in) above the highest projection of the
luminaire, the thermal protector does not operate, and the temperature limits are not exceeded,
1 C6 r6 F1 J5 E! _$ ^in which case the test shall be repeated with the next hotter trim installed.
7 g: g7 r2 t! l0 G15.2.7 Test results shall be acceptable if the thermal protector:
(a) operates within 3 h and no part of the luminaire in contact with thermal insulation or the test
box exceeds 160 °C; or
' b0 @/ X1 m5 N+ a(b) does not operate within 3 h and the temperature limits specified in Table 14.1.2 are not
- T0 g% O+ g& e& z& B. Y, r% g0 zexceeded during the test. Any part of the luminaire in contact with thermal insulation or the test
box shall not exceed 90 °C. The test shall be terminated after 7.5 h.

Mark.Li

怎么没人回答呢？

Mark.Li

求人指点

jayjie729

基本原则就是，做异常时最好选用一个性能好的温控器，在首次加入隔热棉时就3H内动作，测试就OK了，不然50mm重复添加隔热棉很难保证外壳温度不超过限制。

Mark.Li

写的真麻烦。前后矛盾费事。加一次就够了。还要加多少次。