Why do cable joints require fiber optic temperature measurement-INNO

Insulation head 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. Biasanya, 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. Apabila suhu meningkat, 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. Oleh itu, 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. Dalam kes yang teruk, 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. Pada masa ini, 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;

Ciri-ciri Sistem Pengukuran Suhu Gentian Optik Pendarfluor for Cable Head

1. The cable head sistem pengukuran suhu gentian optik fully considers the dispersion of the monitoring area and the complexity of the working environment, such as strong electromagnetic interference, perubahan suhu, dll., and takes corresponding measures. It has usability and reliability in special environments, and continuous real-time temperature measurement display and upload, as well as historical records.

2. The cable head fluorescent fiber optic temperature measurement host is equipped with remote monitoring function. Dengan menggunakan rangkaian pada komputer pemantauan jauh, adalah mungkin untuk memahami situasi setiap titik pengesanan di tapak, yang sangat mudah untuk pemimpin memahami situasi di tapak dengan tepat pada masanya dan kondusif untuk membuat keputusan dan arahan mereka.

3. The fiber optic temperature measurement device for cable joints has control functions. Mampu menghantar maklumat ke bawah, mengeluarkan arahan operasi dan kawalan, dan mengendalikan beberapa peranti yang boleh dikawal untuk meningkatkan tahap automasi.

4. Pemantau suhu gentian optik kepala kabel mempunyai tahap automasi yang tinggi dan boleh mencapai pemantauan suhu keseluruhan kabel kilang pada hos pemantauan, termasuk pemantauan suhu dalam talian peralatan kuasa dan pemantauan suhu saluran kabel.

5. Sistem kawalan suhu kabel mempunyai ketepatan penggera yang tinggi dan fungsi penggera anti palsu. Dengan menggunakan algoritma penggera anti palsu, kejadian penggera palsu boleh dielakkan dengan berkesan, dan kerosakan dalam kedua-dua sistem dan pengesan itu sendiri boleh dipantau secara serentak. Dilengkapi dengan penggera bunyi dan cahaya, hos pemantauan boleh merekod dan mencetak acara, dan mempunyai pertanyaan data sejarah untuk analisis catatan yang mudah.

6. Penderia suhu gentian optik pendarfluor boleh disepadukan dengan antara muka bas kabel pengukuran suhu, dengan kelebihan seperti saiz kecil dan keupayaan anti-gangguan yang kuat.

7. The fluorescence fiber optic temperature measurement system has good compatibility. Sistem ini boleh menyambung dan menyepadukan sistem pengukuran suhu, sistem pengesan suhu, dan peralatan kuasa lain, sangat menjimatkan pelaburan sistem.