Why is temperature measurement necessary for cable joints and how is temperature measurement for cable joints necessary

In order to ensure the smooth operation of the distribution equipment and avoid the occurrence of facility damage and power failure caused by excessive temperature, the power company must assign and measure the cable joint temperature of the distribution box of the high and low voltage distribution room on time during the large load period of the power supply system in the summer. At this stage, for the measurement of cable joints in the distribution box, the key is to carry out point-by-point measurement and record according to the infrared thermometer brought by the operating staff.

With the continuous improvement of the rated voltage of electrical equipment and the continuous increase of the current flow at work, the heating phenomenon of the machine equipment of the optical fiber temperature monitoring system is becoming more and more obvious. When the problem occurs in the power equipment, it is usually accompanied by a temperature change, so the use of the temperature supervision of the power equipment, especially its key components, can immediately grasp the operating status of the power equipment. When the temperature is found abnormal, it can immediately make early warning information and do maintenance, which can also avoid the generation of more common faults.

For the temperature detection of the middle head of the cable, the temperature of the key electrical conductor can be detected immediately. Distributed fiber temperature measurement scheme to achieve this provision, the key has the following difficulties: the indoor space of the middle connector of the cable is very narrow, which has high specifications for the controller; The inside of the middle connector of the cable is in a natural environment of strong magnetic field, and the sensor must be able to operate smoothly under the working condition here; The components embedded in the middle connector of the cable should not cause harm to the electromagnetic field in the middle connector; otherwise, the initial overall design of the cable connector will be invalid, resulting in safety risks. The service life of the cable connector of the optical fiber online temperature measuring device is generally 30 years, so the service life of the embedded temperature measuring device can not be less than 30 years.