Why do cable joints require fiber optic temperature measurement

The real-time monitoring device for cable head temperature can mainly use fluorescent fiber optic temperature measurement devices. FJINNO is a manufacturer of cable head temperature warning and temperature measurement, providing an online monitoring system solution for cable head temperature.

Why do cable heads need temperature monitoring

As an essential part of power distribution facilities, the insulation reliability of cable heads plays a crucial role in the safe operation of the power distribution system. Usually, temperature plays a decisive role in the aging degree of the insulation layer of cable heads. If the temperature exceeds the safe range and lasts for a long time, it will accelerate the aging and detachment of the insulation layer of cable heads. If the cable breaks, grounding faults occur, and the cable connection is not tight, it will cause the temperature of the cable to rise. When the temperature rises, the insulation performance of the cable head will decrease or completely lose its insulation performance, which will have great safety hazards, such as cable short circuits, explosion and fire causing significant property damage and even endangering human life safety. Ji ber vê yekê, it is necessary to monitor the temperature of cable heads, and it is important to eliminate fault hazards in advance.

The faults and power outages of cable lines are mainly divided into external force damage faults and defect type faults. External force damage mainly occurs in the cable body, such as breaking and excavating, stealing cables, and defect type faults mainly occur at the cable terminals. The main cause of defect type faults is the breakdown of cable heads in the ring main unit and cable branch box, resulting in phase to phase short circuits. Once the cable terminal defect in the ring main cabinet or cable branch box develops into a breakdown fault, it often causes the entire space to be covered with dust and black ash. In severe cases, it can cause deformation of space components due to air pressure impact. After the cable head malfunctions and breaks down, emergency repairs often require cleaning, box deformation correction, or even overall replacement of the ring main unit or cable branch box, which greatly increases the time consumption compared to actively powering off to handle defects.

Why does the cable terminal in the ring main cabinet or cable branch box heat up
(1) Thermal breakdown: Due to the presence of insulation medium loss, solid insulation medium will gradually heat up in the electric field. The increase in temperature will lead to a decrease in the resistance of the solid insulation medium, a further increase in current, and an increase in loss and heating. While the insulation medium continuously heats up, there is also a process of continuously dissipating heat outward through electrodes or other media. When heating is faster than heat dissipation, the temperature of the medium will continue to rise, causing the insulation medium to decompose and carbonize, ultimately leading to breakdown.
(2) Heating defects: Due to issues with construction technology or material quality, conductor parts such as cable cores and joint terminals are often prone to heating defects. The combined effect of conductor heating and cable thermal breakdown mechanism ultimately leads to cable insulation breakdown, resulting in faults. Niha, there is no effective device or means to detect the heat condition of cables in cable branch boxes and ring main cabinets.

FJINNO has independently developed a dedicated cable head temperature online monitoring system, specifically designed to eliminate overheating accidents caused by unreliable cable installation, which can avoid hidden accidents and greatly improve the reliability of the power supply system. The data acquisition terminal can transmit the temperature data collected by the temperature probe to the control room or relevant maintenance personnel of the power supply bureau. If there is any abnormal temperature phenomenon, the fault should be promptly eliminated to avoid serious consequences;

Taybetmendiyên Pergala Pîvana Germahiya Fiber Optîka Fluorescent for Cable Head

1. The cable head pergala pîvandina germahiya fiber optîk fully considers the dispersion of the monitoring area and the complexity of the working environment, wek midaxeleya elektromagnetîk a xurt, guherînên germê, etc., û tedbîrên têkildar digire. Di hawîrdorên taybetî de bikêrbûn û pêbaweriya wê heye, û pêşandan û barkirina pîvana pîvana germahiya rast-dema domdar, û herwiha tomarên dîrokî.

2. Mêvandarê pîvandina germahiya fiber optîk a serê kabloyê ya fluorescent bi fonksiyona çavdêriya dûr ve tê stend. Bi karanîna torê li ser komputerek çavdêriya dûr, mimkun e ku meriv rewşa her xala tespîtê li ser malperê fêm bike, ku ji rêberan re pir rehet e ku rewşa li ser cîhê di wextê xwe de fam bikin û ji biryargirtin û fermana wan re alîkar e.

3. The fiber optic temperature measurement device for cable joints has control functions. Dikare agahiyê ber bi jêr ve bişîne, derxistina talîmatên operasyon û kontrolê, û hin amûrên kontrolkirî dixebitin da ku asta otomasyonê baştir bikin.

4. Çavdêriya germahiya fiber optîk a serê kabloyê xwedan astek bilind a xweseriyê ye û dikare çavdêriya germahiyê ya tevahiya kabloyên kargehê li ser mêvandarê çavdêriyê bi dest bixe., tevî çavdêriya germahiya serhêl a alavên hêzê û çavdêriya germahiya kanalên kabloyê.

5. Pergala kontrolkirina germahiya kabloyê xwedan rastbûna alarma bilind û fonksiyona alarma derewîn e. Bi karanîna algorîtmayên alarma derewîn, rûdana alarmên derewîn dikare bi bandor were dûr kirin, û xeletiyên hem di pergalê û hem jî di detektorê bixwe de dikarin bi hevdemî werin şopandin. Bi alarmên deng û ronahiyê ve girêdayî ye, mêvandarê çavdêriyê dikare bûyeran tomar bike û çap bike, û ji bo analîzkirina postê hêsan pirsên daneyên dîrokî hene.

6. Sensorên germahiya fiber optîk ên fluorescent dikarin bi navgînên otobusa kabloya pîvana germahiyê re werin yek kirin, bi avantajên wekî mezinahiya piçûk û hêza dijî-destwerdana bihêz.

7. Pergala pîvandina germahiya fiber optîk a fluorescence lihevhatinek baş heye. Ev pergal dikare pergalên pîvandina germahiyê bi hev ve girêbide û bike yek, pergalên hîskirina germahiyê, û alavên din ên hêzê, veberhênana pergalê pir xilas dike.

Sensor germahiya fiber optîk, Pergala çavdêriya hişmendî, Li Chinaînê çêkerê fiber optîkê hatî belav kirin