UL1598 15.2 Non-IC 温升测试问题
本帖最后由 Mark.Li 于 2014-6-10 10:23 编辑请教各位下？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？
15.2.3 For ceiling-mounted luminaires, the thermal insulation specified in Clause 19.16 shall be placed
around the luminaire in the test box as follows:
(a) the initial depth of the thermal insulation shall be 100 mm (4 in) above the bottom of the
test 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
(c) if more than one test iteration is required to achieve the results specified in Clause 15.2.7,
an additional 50 mm (2 in) of thermal insulation shall be added for each successive iteration.
The 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
thermal insulation level, the test shall be restarted with all temperatures at room ambient.
SEPTEMBER 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
216 mm (8.5 in) of thermal insulation.
15.2.5 The test lamp type and wattage for:
(a) an incandescent luminaire shall be as marked on the luminaire and as specified in Clause
19.8 and Table 19.8.2; and
(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
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
(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,
in which case the test shall be repeated with the next hotter trim installed.
15.2.7 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
(b) does not operate within 3 h and the temperature limits specified in Table 14.1.2 are not
exceeded 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.
怎么没人回答呢？ 求人指点 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。 写的真麻烦。前后矛盾费事。加一次就够了。还要加多少次。
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