Cable online monitoring device and system

The invention relates to a cable online monitoring device and system. The cable online monitoring device comprises a first temperature sensor and a heat shield, wherein the first temperature sensor isused for monitoring the temperature information of a cable, the heat shield covers the cable, the heat shield is provided with an accommodating cavity, and the first temperature sensor is arranged inthe accommodating cavity. The cable online monitoring device is advantaged in that influence of the environment temperature on the temperature information of the cable monitored by the first temperature sensor can be avoided through the heat shield, so the temperature of the cable monitored by the first temperature sensor is more accurate. 本申请涉及一种电缆在线监测装置和系统。所述电缆在线监测装置包括第一温度传感器和隔热罩。所述第一温度传感器用于监测电缆的温度信息。所述隔热罩罩设于所述电缆，所述隔热罩开设有容纳腔，所述第一温度传感器设置于所述容纳腔内。本申请实施例提供的所述电缆在线监测装置通过所述隔热罩可以避免环境温度对所述第一温度传感器监测的所述电缆的温度信息的影响，从而使得所述第一温度传感器监测的所述电缆的温度更加准确。