Response of the infrared thermometer to shock
Faults in electrical equipment, whether they are caused by the current effect of heating faults (faults in conductive circuits), the heating power is proportional to the square of the value of the load current. Voltage effect caused by heating faults (insulation medium failure), the heating power and operating voltage is proportional to the square. Therefore, the size of the operating voltage and load current of the equipment will directly affect the effectiveness of infrared detection and fault diagnosis. The increase in leakage current can cause uneven voltage in some parts of the high-voltage equipment. If there is no loaded operation or the load is very low, it will make the equipment fault heating is not obvious, even if there is a more serious fault, it is unlikely to be exposed by the characteristic thermal anomaly form. Only when the equipment is running at the rated voltage, and the higher the load, the more serious the heating and temperature rise, and the more obvious the characteristic thermal anomalies at the point of failure are exposed. Therefore, in infrared detection, in order to achieve reliable detection results, to try to ensure that the equipment in the rated voltage and full-load operation, even if it can not do continuous full-load operation, but also should be prepared for a running programme, so that in the detection process before and during the test, the equipment can be run at full load for a period of time (eg, 4 ~ 6h), so that the faulty parts of the equipment have enough time to heat up and ensure that the surface of the stability of the temperature rise. Temperature rise.
Due to electrical equipment failure infrared diagnosis, fault judgement criteria is often based on the temperature rise of the equipment at rated current, so when the test when the actual operating current is less than the rated current, it should be the site of the actual measurement of the equipment failure point temperature rise converted to the temperature rise of the rated current.
The advantages of infrared thermometer
Convenience Infrared thermometers provide rapid temperature measurements, and in the time it takes to read one leaking connection with a thermocouple, it is possible to read temperatures at virtually all connections with an infrared thermometer. In addition, because the thermometer is solid, it is lightweight and easy to store when not in use. . lightweight and easy to carry in a holster when not in use. It can be carried during factory visits and daily inspection work.
The first infrared thermometer is usually accurate to within 1 degree. This is especially important when doing preventive maintenance, such as monitoring poor production conditions and special events that will cause equipment damage or downtime. With an infrared thermometer, you can quickly detect even small changes in operating temperatures, solving problems in their infancy and reducing the expense and scope of repairs caused by equipment failure.
Secondly, infrared thermometers can safely read hard-to-reach or inaccessible target temperatures within the range allowed by the instrument. Non-contact temperature measurement can also be carried out in unsafe or contact temperature measurement is difficult to carry out in the area, safe measurement is as easy as in the hands of the measurement.
