Principle and application scope of ground resistance tester
Regarding the principle and application scope of the ground resistance tester, the ground resistance tester is a commonly used instrument for inspecting and measuring ground resistance. It is also used for electrical safety inspection and grounding project completion acceptance. The working principle and application scope of the ground resistance tester.
The ground resistance tester is a commonly used instrument for testing and measuring ground resistance. It is also an indispensable tool for electrical safety inspection and completion acceptance of grounding projects. In recent years, due to the rapid development of computer technology, it is also an indispensable tool for electrical safety inspection and grounding project completion acceptance.
Therefore, the ground resistance tester also incorporates a large amount of ground resistance tester microprocessor technology, and its measurement functions, content and accuracy are incomparable to ordinary instruments.
Currently, advanced ground resistance testers can meet all ground measurement requirements.
Using the new clamp method, there is no need to install piles and set out wires for online direct measurement.
A powerful ground resistance tester is controlled by a microprocessor. It can automatically detect the connection status of each interface and the interference voltage and interference frequency of the ground network. It also has unique functions such as value retention and intelligent prompts.
The working principle of the ground resistance measuring instrument: the DC/AC converter in the machine converts DC into AC low-frequency constant current. Through the auxiliary ground electrode C and the object under test E, a loop is formed, and an AC voltage drop is generated on the object under test. The auxiliary ground electrode P is sent to the AC amplifier for amplification, and then sent to the meter for display after detection. With the help of the magnification switch, three different limits can be obtained: 0~2Ω, 0~20Ω, and 0~200Ω.
Scope of use of the ground resistance measuring instrument: It is suitable for measuring the ground resistance of various devices and measuring the resistance value of low-resistance conductors in electric power, post and telecommunications, railways, communications, mining and other departments; this meter can also measure soil resistivity and ground voltage.
