UL1977是用于数据、信号、控制和电力应用中使用的连接器UL认证标准，连接器UL1977认证需要进行温升测试。UL1977温升测试是测试连接器在通zui大额定电流情况下部件的温度变化情况，以确定连接器工作时可被接触到的部分，是否存在温度过高造成人身伤害的风险。
UL1977温升测试产品数量
6个新样品
UL1977温升测试方法
- The temperature measurement is to be made on the wiring terminalsof 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 stabilizedtemperatures are attained in a shorter period of time
zui少连续运行4个小时，温度在很短的时间内稳定
- Three consecutive readings, taken at 5 minute intervals indicateno 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 thesame 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)
UL1977温升测试判定标准
- The measured temperature shall not exceed the Relative ThermalIndex (electrical) of the insulating material
UL：zui高温度不能超过塑料的RTI (Elec.)值
UL+CUL：温升不能超过30K。
