With the continuous development of science and technology, the types and functions of testing instruments in the power industry are constantly enriched and improved.
The following will introduce some common cable testing instruments and their characteristics.
1. Cable fault locator.
A cable fault locator is an instrument used to quickly and accurately locate the fault point of a cable. It uses the high-frequency signal injection method, which uses the signal reflected from the fault point to locate the fault by injecting a high-frequency signal into the cable. The instrument has the characteristics of accurate positioning, easy operation and wide range of application, and is widely used in cable fault detection in the fields of electric power, communication and transportation.
2. Cable insulation resistance tester.
The cable insulation resistance tester is used to measure the insulation resistance value of the cable and is an important tool to evaluate the insulation performance of the cable. The instrument uses a high-voltage DC or AC power source to calculate the insulation resistance value by measuring the voltage and current at both ends of the cable. It has the characteristics of accurate measurement, easy operation, safety and reliability, and is a commonly used testing instrument in cable maintenance and management.
3. Cable partial discharge detector.
The cable partial discharge detector is used to detect the partial discharge phenomenon in the cable, which is an important means to evaluate the operation status of the cable. The instrument uses a high-frequency current sensor and a high-speed data acquisition system, which can monitor the partial discharge signal in the cable in real time, and obtain the location and intensity of the discharge through analysis and processing. It has the characteristics of high sensitivity, accurate positioning, strong anti-interference ability, etc., which is of great significance for timely detection and treatment of cable hidden dangers.
Fourth, cable sheath protection performance tester.
The cable sheath protection performance tester is used to evaluate the protection performance of the cable sheath, including the corrosion resistance, wear resistance, aging resistance and other aspects of the sheath. By simulating the actual operating environment, the instrument conducts accelerated aging, salt spray corrosion and other tests on the cable sheath to evaluate the performance and service life of the sheath. It has the characteristics of short test cycle, reliable results and easy operation, which provides an important basis for the selection and maintenance of cables.
5. Cable conductor resistance tester.
The cable conductor resistance tester is used to measure the resistance value of the cable conductor and is a key instrument to evaluate the electrical conductivity of the cable. The instrument uses a four-wire measuring principle that eliminates the effects of contact resistance and lead resistance, resulting in a more accurate conductor resistance value. It has the characteristics of high measurement accuracy, good stability and easy operation, which is of great significance for ensuring the transmission performance and safety of the cable.
6. Cable appearance inspector.
The cable appearance inspector is an instrument used to check the appearance quality of cables, including the detection of cable surface defects, sheath damage, insulation layer damage, etc. The instrument uses high-definition camera and image processing technology, which is able to capture and display the appearance image of the cable in real time, and quickly and accurately find the appearance defects of the cable through automatic analysis and identification. It has the characteristics of fast detection speed, high accuracy and easy operation, which plays an important role in improving the quality of cable production and reducing the failure rate.
To sum up, there are many types of cable testing instruments, each with its own unique functions and characteristics. In practical applications, appropriate instruments should be selected for testing according to specific needs and scenarios to ensure that the quality and performance of the cable meet the requirements. At the same time, with the continuous development of science and technology, cable testing instruments are also constantly upgraded and improved, providing strong support for the development and progress of the cable industry.