The best temperature measurement system for cable joints in ring main unit cabinets

High voltage switchgear busbar contacts, ring main unit cable joints, transformer winding temperature monitoring, and anti electromagnetic interference in microwave thermal therapy RF environments can all be used.

The failure rate of cable joints in ring main unit cabinets in distribution networks is relatively high, mainly affected by factors such as cable joint materials and construction techniques. The main hidden dangers are poor contact and insulation degradation. The development of hidden dangers to a certain extent will lead to malfunctions.

At present, real-time online monitoring of the temperature at the inlet and outlet cable joints of the ring main unit is achieved through the use of fiber optic temperature measurement technology, in order to solve the following problems.

(1) Identify potential hazards in cable joints as early as possible, handle them promptly, and prevent them from escalating into accidents.

(2) Reduce the workload of distribution network inspections, temporary inspections, and scheduled inspections, and improve the efficiency of operation and maintenance work.

The failure of cable joints is mainly caused by local heating and partial discharge, which leads to insulation breakdown and operational accidents. The main reasons are: poor crimping of the cable connecting pipe during the joint production process, increased contact resistance leading to poor contact and overheating, defects caused by non-standard joint installation and production process, aging of insulation materials, etc.

Overheating of cables can cause carbonization and aging of insulation materials, leading to a decrease in insulation strength and damage to the insulation layer; Partial discharge accelerates insulation layer damage.

Characteristics of Fluorescent Fiber Optic Temperature Measurement System for Ring Main Cabinet Cable Joint

1. Fluorescent fiber optic temperature sensors are naturally immune to strong electric and magnetic fields, providing precise temperature management solutions for power cable applications;

2. The fiber optic temperature measurement system has high measurement accuracy and fast response;

3. Supports uploading upper computer and RS485 communication, with a universal standard protocol;

4. Provide optional LCD display screens for intuitive display of temperature data;

5. Industrial structural design, convenient system installation, stable and reliable operation;

6. Through industrial environmental adaptability testing, it ensures adaptability to harsh environments in industrial applications;

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