The vacuum switch vacuum degree tester plays a crucial role in the power system, and its accuracy and convenience are directly related to the stability and safety of the power system. This article will delve into the measurement principle of the vacuum switch vacuum degree tester and share some practical skills to help you better use this equipment.
1. Measurement principle
The vacuum switch vacuum degree tester adopts the magnetic discharge method for measurement. During the testing process, it is necessary to first open the two contacts of the vacuum switch arc extinguishing chamber to a certain distance, and then apply pulse high voltage. At the same time, the electromagnetic coil surrounds the outer side of the arc extinguishing chamber, passing a large current to the coil, thereby generating a pulse magnetic field synchronized with high voltage in the arc extinguishing chamber.
Under the action of a pulsed magnetic field, electrons in the arc extinguishing chamber undergo spiral motion and collide with residual gas molecules for ionization. The ion current generated is approximately proportional to the residual gas density or vacuum degree. For different vacuum tubes, the magnitude of ion current varies under the same vacuum degree conditions. The testing instrument automatically calculates the vacuum degree by measuring the ion current and combining it with the ion current vacuum degree curve, and displays the vacuum degree value.
2. Practical skills
① Set the pipe type correctly:
Before using the vacuum switch vacuum tester, it is necessary to select the appropriate tube type setting based on the diameter of the arc extinguishing chamber. Incorrect tube configuration may result in measurement deviation.
② Ensure a good testing environment:
During the testing process, it should be ensured that the tested vacuum switch is in a normal disconnected state and placed on a well insulated support frame. At the same time, the installation position of the magnetic control coil is also very important, and it should be installed slightly offset from the position of the moving contact in the middle of the arc extinguishing chamber to ensure the accuracy of the test.
③ Pay attention to the wiring sequence:
When wiring, the magnetic control coil and vacuum tube should be connected first, and then connected to the instrument. This can avoid unexpected situations during the connection process that may affect the test results.
④ Regular calibration and maintenance:
To ensure the accuracy of the test results, the vacuum switch vacuum degree tester should be calibrated regularly. At the same time, regularly clean and maintain the instruments to ensure they are in good working condition.
⑤ Timely handling of faults:
In the process of use, if there is an instrument malfunction or abnormal situation, it should be dealt with in a timely manner. Do not forcefully use faulty instruments for testing to avoid unnecessary losses.
In summary, the measurement principle of the vacuum switch vacuum degree tester is based on the magnetic discharge method, which infers the vacuum degree by measuring the ion current. Following the correct operating steps and practical skills during use can ensure the accuracy and reliability of test results. I hope this article is helpful for you to better understand and use the vacuum switch vacuum degree tester.
The ZC-313 Vacuum Interrupter Detector abandons the traditional withstand voltage method and uses the magnetic discharge method for measurement, so there is no need to disassemble the arc extinguishing chamber. The use of a single-chip microcomputer for synchronous control and data acquisition processing improves the on-site testing sensitivity of the vacuum degree in the arc extinguishing chamber. This product has a compact structure, a lightweight and compact model, shorter testing time, higher measurement reliability, stability, accuracy, and more complete functions.
Kvtester Electronics Technology Co.,Ltd. is a high-tech enterprise specializing in power testing, testing, research and development, production, and sales of testing equipment. It has been engaged in the electrical testing industry for many years, and its products are of high quality. We welcome customers to come and purchase. Service hotline: 0086-27-81778799, to learn more, visit the official website: www.kvtester.com
