Fiber optic temperature measurement system for ring main unit

Characteristics of fluorescent fiber optic temperature measurement system for cable joints of ring main unit

The internal cable joints of the ring main unit are prone to heating up due to various reasons, resulting in temperature rise and oxidation problems, which can significantly reduce the actual service life of the cables. It may also cause a series of hazards such as explosions, insulation breakdowns, and even large-scale power outages, ultimately affecting the safe operation of the entire power grid. The fluorescence fiber optic temperature measurement device independently developed by Fuzhou Huaguang Tianrui can detect the temperature of cable joints in the ring main unit. The temperature measurement system for ring main units, developed based on the principle of fluorescent fiber optic temperature measurement, can measure various joint temperatures. Multiple customer cases have also confirmed that the fluorescent fiber optic temperature measurement system can be used for temperature detection of cable joints in ring main units.

The fluorescent fiber optic temperature measurement system for the cable joint of the ring main unit is inherently safe, resistant to strong electromagnetic interference, has good electrical insulation, stable performance, corrosion resistance, and long service life; High temperature measurement accuracy, wide temperature measurement range, and flexible configuration of temperature measurement channels; Easy installation, flexible networking, standardized data transmission, high cost-effectiveness, and stable quality; The preferred products for temperature monitoring include cable joints, insulation plugs, elbow heads, etc. for power ring main units.
The system for detecting the temperature of cable joints in ring main units using fluorescent fiber optic temperature sensors can improve data management functions and also meet the practical needs of online temperature monitoring in ring main units. The fiber optic temperature measurement system for the cable joint of the ring main unit adopts a fluorescent fiber optic temperature measurement device. The sensing probe of this device is made of imported quartz fiber and has complete electrical insulation, which is not affected by high voltage and strong electromagnetic fields. It is resistant to chemical corrosion and pollution-free. In addition, the temperature measurement probe has been processed by our company to increase the temperature measurement area, which can measure the temperature of the outer wall of the cable joint. It has fast response speed, simple installation, and high temperature resistance. At the same time, the system also provides remote transmission, making it convenient for customers to install communication software on any computer and monitor remotely.

Technical parameters of fluorescent fiber optic temperature transmitter for cable joints of ring main unit

The following parameters are displayed as standard parameters and can be customized according to specific customer needs, making it easier to respond promptly to inquiries by phone:

Note: DC24V or AC220V power supply, 1-6 temperature measurement channels (expandable), standard RS485 communication interface provided, temperature information can be remotely transmitted to the background. Specially developed for real-time online temperature detection of cable joints in ring main units, with flexible installation and channel configuration that can be customized according to user needs. It can be externally connected to Huaguang Tianrui standard LCD display instruments.

Fluorescent fiber optic probe

The fiber optic probe consists of three parts: ST connector, fiber optic cable, and end temperature sensing end. The ST connector is the connection part with the optoelectronic module; Fiber optic cable is the transmission part, with quartz fiber inside. The quartz fiber has a coating and cladding on the outside, and a PTFE protective sleeve on the outermost part; The temperature sensing end contains temperature sensing rare earth materials, which are used to generate optical signals containing temperature information; The overall temperature resistance of the optical fiber is 200 ℃, with an outer diameter of 3mm. The long-term bending radius is 13.2cm. The short-term bending radius is 4.4cm. When the distance between the optical fiber lead and the ground is 0.4m, it can withstand a power frequency voltage of 100KV for 5 minutes.