Armored thermal resistance PT100 WZP2-231 is a type of temperature sensor widely used in power plants. The RTD element is housed in a protective sleeve or armor made of stainless steel or other materials to provide mechanical protection, prevent damage, and enhance its resistance to harsh environments. The sheath can also be bent or formed to fit tight spaces or reach inaccessible locations.

Application of Thermal Resistance in Thermal Power Plants

Besides of the RTD WZP2-231, there are many types of thermal resistance widely used in power plants, mainly in the following areas:

Flue gas temperature measurement: Thermal resistance is used to measure the temperature of flue gas in boilers, flue gas pipelines, and other equipment in power stations to ensure normal and safe operation of the equipment.

Steam turbine temperature measurement: use thermal resistance to measure the temperature of various parts of the steam turbine, including high pressure cylinder, intermediate pressure cylinder, low pressure cylinder, etc., to monitor the operating status of the equipment and prevent failures.

Generator stator temperature measurement: The temperature of the generator stator is one of the important indicators for normal operation of the generator. Thermal resistance is used for temperature measurement to ensure safe and stable operation of the generator.

In short, thermal resistance is widely used in power plants and is an important guarantee for safe and stable operation of power plants. However, as a sensitive element, thermal resistance often has some faults. We need to learn how to judge the fault of thermal resistance to ensure the normal operation of the equipment. Here, YOYIK introduces common thermal resistance failures and their causes.

Common Thermal Resistance Faults and Causes

Line fault: Damaged or poorly contacted wires of the thermal resistance can cause distortion in the measured signal or prevent normal output.

Temperature offset: When using a thermal resistance, changes in the measurement environment and working conditions may cause the measured value of the thermal resistance to shift.

Drift: The resistance value of the thermal resistance will change with the increase of usage time, and if used for a long time, it will gradually increase the measurement error.

Environmental impact: The measurement accuracy of thermal resistance may be affected by external environment, such as temperature, humidity, electromagnetic interference, etc.

Damage: Damage to the housing or resistance wire of the thermal resistance may result in abnormal output or distortion of the measured signal.

Maintenance Method of Thermal Resistance

In order to ensure the accuracy and reliability of the thermal resistance, it is necessary to conduct regular calibration and maintenance, and avoid excessive vibration, excessive stretching, excessive bending, and other operations. Routine maintenance of thermal resistance usually includes the following aspects:

Cleaning: Regularly clean the surface and wiring terminals of the thermal resistance to avoid the accumulation of dust and corrosive substances affecting the measurement accuracy.

Calibration: Regularly calibrate the thermal resistance to ensure that its measurement accuracy meets the requirements. The verification method can be comparative method or simulation method.

Replacement: The service life of the thermal resistance is limited, and in case of damage or failure, it needs to be replaced in a timely manner.

Protection: For thermal resistance that need to be used in harsh environments, protective measures can be taken, such as installing protective covers, protective covers, etc.

Storage: When the thermal resistance is out of service, attention should be paid to the correct storage method to avoid moisture, corrosion, mechanical damage, and other conditions that affect the service life and measurement accuracy of the thermal resistance.

YOYIK recommends that users regularly maintain the thermal resistance to improve their service life and measurement accuracy, ensuring the reliability of measurement results.