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The best distributed fiber optic temperature measurement system for cable tray temperature measurement

The cable tray temperature measurement system is a necessary and important component of the cable tray, and the cable trough type cable tray is used to place cables in the air. The problem with existing cable tray systems is that cable heating can easily generate high temperatures, leading to accidents such as circuit short circuits or fires.

Cable tray products are a new type of cable laying device developed in industrialized countries in the early 1960s. With the high development of electrification and automation, especially the change in power distribution methods, direct burial in trenches and cable support installation can no longer meet the requirements for use. Instead, cable trays have been replaced, accelerating construction progress, ensuring quality, and achieving product standardization, serialization, and generalization.

In the field of nuclear power, the fire safety protection of cable trays is very important. In the event of an accidental fire, they can temporarily protect the normal operation of cables, thereby ensuring the safe operation of nuclear power plants. When thick insulation materials are used for cable trays, the problem that comes with it is that the internal temperature rise of the cable will be relatively high when it is powered on normally, which also creates another safety hazard; How to control the normal temperature rise inside cable trays while ensuring their fire safety is a problem that nuclear power facilities must solve. Therefore, it is important to experimentally test the temperature difference between the inside and outside of cable trays equipped with protective devices during normal operation, or to determine the maximum internal temperature that can be reached at a specific external temperature, in order to ensure the safe operation of cables. But currently, there is no good testing method or means to solve the above problems.

The commonly used cable tray is a closed body composed of a main body and a cover plate. Due to the inability to dissipate the heat generated by the cable during long-term operation, the current carrying capacity of the cable is greatly reduced, and it is prone to fire.

In the field of nuclear power, the fire safety protection of cable trays is very important. In the event of an accidental fire, they can temporarily protect the normal operation of cables, thereby ensuring the safe operation of nuclear power plants. When thick insulation materials are used for cable trays, the problem that comes with it is that the internal temperature rise of the cable will be relatively high when it is powered on normally, which also creates another safety hazard; How to control the normal temperature rise inside cable trays while ensuring their fire safety is a problem that nuclear power facilities must solve. Therefore, it is important to experimentally test the temperature difference between the inside and outside of cable trays equipped with protective devices during normal operation, or to determine the maximum internal temperature that can be reached at a specific external temperature, in order to ensure the safe operation of cables. But currently, there is no good testing method or means to solve the above problems.

Cable trench is an underground pipeline used to place and protect cable facilities, and is an indispensable infrastructure in power plants, substations, municipal engineering, and large factories and mines. However, due to the influence of terrain, design structure, or environmental factors, there may be a large temperature difference between the inside and outside of the cable trench after a period of time, which can easily cause condensation or water accumulation, corrode the cables in the trench, damage the insulation of the cables, affect their lifespan, and in severe cases, even cause explosions due to cable water ingress.

Distributed fiber optic temperature measurement system for cable tray

1. Real time performance: The system monitors the temperature of cable trays in real-time 24/7, timely detects and locates temperature anomalies, and achieves early warning;

2. Distributed: The system provides continuous dynamic monitoring signals for distributed temperature measurement, which can measure the temperature changes of the monitored object at various points every 1 meter in real-time;

3. Progressiveness: The optical fiber itself is not only used for signal transmission, but also for temperature detection, that is, communication and sensing integration. By using different outer sheath materials, the system can adapt to various environments;

4. Accuracy: The temperature measurement accuracy of the system is ± 1 ℃, and the positioning accuracy is 1m;

5. Flexibility: Various functional settings are implemented by the application software on the system host, and multi-level temperature alarms can be set, and can be adjusted according to different environments; Each alarm zone can be programmed separately and designed according to user requirements;

6. Scalability: The system can simultaneously measure multiple optical fibers, and multiple devices can be selected according to actual needs, with multiple options available;

7. Compatibility: The system supports Ethernet port and RS232 interface, providing partition, temperature, and alarm information to end user control systems (such as tablet PCs);

8. Long service life: Armored temperature sensing cables can have a service life of up to 25 years without being damaged by external forces;

9. Easy to use: The system provides a visual interface, which is simple and concise, and will not bring additional management costs to customers;

10. Intrinsic safety: The system has characteristics such as intrinsic safety, explosion-proof, resistance to strong electromagnetic interference, and lightning protection;

11. The system has a wide range of applications: power plants, transmission and distribution grids, high-rise buildings, large shopping malls, warehouses, teaching buildings, residential areas, subways and other public places.

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