Grounding resistance tester's working principle and its scope of use - Database & Sql Blog Articles

Kaixin micro test

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Test probe PH-5H

The grounding resistance tester is a common instrument for testing and measuring the grounding resistance. It is also an indispensable tool for the completion of electrical safety inspection and grounding engineering. In recent years, due to the rapid development of computer technology, the grounding resistance tester has also penetrated a large number of grounding resistance testers. Microprocessor technology, its measurement function, content and accuracy are incomparable to the general instrument. The advanced ground resistance tester can meet all grounding measurement requirements. With the new jaw method, there is no need to install the pile release line for direct online measurement. A powerful ground resistance tester is controlled by a microprocessor, which can automatically detect the connection status of each interface and the interference voltage and interference frequency of the ground network, and has unique functions such as numerical maintenance and intelligent prompts.

working principle:

The working principle is that the DC/AC converter in the machine converts the direct current into a low-frequency constant current of the alternating current, and the auxiliary grounding electrode C and the measured object E form a loop, and an AC voltage drop is generated on the measured object, and is sent through the auxiliary grounding pole P. The AC amplifier is amplified and then sent to the meter display after detection. With the override switch, three different limits are available: 0 to 2 Ω, 0 to 20 Ω, and 0 to 200 Ω.

Use range:

It is suitable for measuring the grounding resistance of various devices and measuring the resistance of low resistance conductors in electric power, post and telecommunications, railway, communication, mining and other departments; this table can also measure soil resistivity and ground voltage.