What are the disadvantages of thermal resistors in the hydropower industry? What should we do if they are affected by sparks or arcs?

In the hydropower industry, unstable performance and poor reliability of temperature measuring thermal resistors are very common problems. The temperature signal false alarm caused by unstable performance has been troubling the operators and maintenance personnel of the power plant. In severe cases, it can cause the unit to shut down due to accidents, which will have an immeasurable impact on the life of the unit and the safety of the power grid. Therefore, it is very urgent to analyze the causes of temperature measuring resistor failures and improve the long-term stability and reliability of temperature measuring resistors.
Because the electron density of thermal resistors is different, a certain amount of electron diffusion is generated. When they reach a certain balance, the potential formed and the size of the contact potential depend on the material properties of the two different conductors and the temperature of their contact points. The thermocouples currently used internationally have a standard specification. However, the electrical signal of the thermocouple requires a special wire to be transmitted, which we call a compensation wire. Different thermocouples require different compensation wires, and their main function is to connect with the thermocouple to keep the reference end of the thermocouple away from the power supply.
The explosive mixed gas inside the shell of the thermal resistor is affected by sparks or arcs. The circuit breaker repair of the resistor body will inevitably change the length of the resistance wire and affect the resistance value. For this reason, it is better to replace the new resistor body. If welding is used for repair, it must be calibrated before it can be used. The change of the measured temperature is directly measured by the change of the resistance value of the thermal resistor. Therefore, the change of the resistance of various wires such as the lead wire of the thermal resistor body will affect the temperature measurement. This method is usually used in conjunction with the bridge, which can better eliminate the influence of the lead resistance and is the most commonly used in industrial process control.
When the explosion of the thermal resistor caused by sparks or arcs is confined to the junction box, the production site will not cause an explosion, and it is close to the end face of the thermometer. Compared with general axial thermal resistors, it can more accurately and quickly reflect the actual temperature of the measured end face, and is suitable for measuring the end face temperature of bearings and other parts.
What are the advantages and disadvantages of using thermal resistors in the hydropower industry?
People's lives are widely used. With the development of technology, thermal resistors are not only used in daily life, but also play a very important role in the hydropower industry.
Advantages of thermal resistors in the hydropower industry: With the development of industry, thermal resistors have been widely used in industrial production measurements. Thermistors are the most important sensors in hydropower plants. It can be said that they play a vital role because the operation of thermometers in hydropower plants directly affects whether the generator sets can operate safely. Disadvantages of thermal resistors in the hydropower industry: In the hydropower industry, unstable performance and poor reliability of thermometers are very common problems. False alarms of temperature signals due to unstable performance have always troubled the operators and maintenance personnel of power plants. In severe cases, they can cause unit accidents and shutdowns, which will have an immeasurable impact on the life of the unit and the safety of the power grid. Therefore, it is a very urgent task to analyze the causes of thermometer failures and improve the long-term stability and reliability of thermometers.