今天给大家介绍一下UL1977标准的温升测试

Method:

• The temperature measurement is to be made on the wiring terminals of each device
• 温升测试点应布在接线端子上
• The test is to continue for 4 hours even if stabilized temperatures are attained in a shorter period of time
• 最少连续运行4个小时，即使温度在很短的时间内稳定
• Three consecutive readings, taken at 5 minute intervals,indicate no further rise above the ambient temperature
• 三次连续读数，每次间隔5分钟
• All contacts are to be connected in series so as to carry the same test current.
• 所有的端子需要串成一个回路来通相同的电流
• Tested at a draft-free area having an ambient temperature of 25 ±5°C (77 ±9°F)
• 测试的环境温度应保持在25 ±5°C (77 ±9°F)

• 温升测试示意图

Result:
The measured temperature shall not exceed the Relative Thermal Index (electrical and mechanical without impact) of the insulating material

• 最高温度不能超过塑料的RTI(Elec. and mech.without impact)值

Notes:

5. A Type 0 or Type 1A device not assigned a current rating need not be tested

• Type 0或者Type 1A的连接器在不指定电流时可以不做温升测试

5. For connectors with groups of contacts with different electrical ratings, each group is to be wired as a separate series circuit and tested concurrently

• 当连接器的多种端子有不同电流时，那么每种端子的测试回路需要分开，并且同时做测试

德立弗检测是UL1977标准的免目击实验室，可以直接安排认证前的摸底和认证中的测试，无需排队，快捷完成，欢迎您的咨询！