Detailed Introduction Of The Earth Resistance Tester

Thegrounding resistance testeris a common instrument to check and measure the grounding resistance, and it is an indispensable operation tool in the electrical test engineering. With the rapid development of technology, today's grounding resistance tester has made a major breakthrough, which is widely used in electric power, railway, communication, mine, post and telecommunications, meteorology, oil field, construction and industrial electrical. Next,GDZXwill introduce the grounding resistance tester in detail.

I Working principle

The working principle of the grounding resistance tester is that the DC/AC converter in the machine changes the DC into the AC low-frequency constant current. After the auxiliary grounding electrode C and the tested object e form a circuit, the AC voltage drop is generated on the tested object. The auxiliary grounding 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 multiplier switch, three different measuring ranges can be obtained: 0 ~ 2 Ω, 0 ~ 20 Ω, 0 ~ 200 Ω.

II Measuring range

In the application of electric power, railway, communication, mine, post and telecommunications, meteorology, oil field, construction and industrial electric, it can measure the grounding resistance of various devices, the conductor resistance of low resistance, and the soil resistivity and ground voltage.

III Product type

1. The clamp type ground resistance tester can measure the ground fault which can not be measured by the traditional method, and can be applied to the occasions which can not be measured by the traditional method, because the clamp type ground resistance tester measures the comprehensive value of the ground body resistance and the ground lead resistance. ETCR2000 of GDZX does not use auxiliary electrode, and there is no pole distribution error. When the test is repeated, the consistency of the results is very good.

2. The digital earth resistance tester abandons the traditional manual power generation mode. The BY2571 digital earth resistance tester of GDZX adopts the high-strength aluminum alloy as the shell in the structure, the phase-locked loop synchronous tracking detection method and the switched capacitor filter in the circuit to prevent the power frequency and radio frequency interference, so that the instrument has better anti-interference ability. In addition, advanced LSI and DC/AC conversion technology are used to convert DC into AC low frequency constant current, which is very convenient to measure.

3. The double jaw grounding resistance tester uses the new jaw method and is controlled by a microprocessor. It can automatically detect the connection status of each interface, the interference voltage and frequency of the grounding grid, and has unique functions such as numerical value retention and intelligent prompt. ZXET3006 double jaw grounding resistance tester of GDZX has not only the function of traditional auxiliary grounding resistance measurement, but also the unique function of non auxiliary grounding resistance measurement, which changes the traditional measurement principle and method of grounding resistance measurement: using the double jaw non-contact measurement technology, it does not need to play auxiliary grounding electrode, and it does not need to separate the grounding body from the load to realize online measurement. Under the condition of single point grounding system and strong interference, the measurement method of auxiliary grounding pole can be used.

4. The measurement system oflarge-scale grounding gridfrequency conversion and high current grounding characteristics: the system has high output power (2-20kw), high voltage (0-1000V), and high output current (0-50A). The measurement of ground impedance, ground reactance, ground resistance, contact voltage, step potential difference, field surface potential gradient, contact voltage, contact potential difference, step voltage, transfer potential, conduction resistance, soil resistivity and other parameters can comprehensively measure the specific parameters of large-scale grounding grid.

5. Large scale grounding grid frequency conversion and high current grounding impedance measurement system: the system has high output power (5-20KW), output voltage (0-1000V), and output current (0-50A). The parameters such as ground impedance, ground resistance, contact potential difference, ground reactance, on resistance and soil resistivity are measured.

6. Frequency conversion anti-interference grounding impedance meter: system output power 2KW, output voltage (0-200-400V), test output current (0-10A). The parameters such as ground impedance, ground resistance, ground reactance, on resistance and soil resistivity are measured. It can be used to measure the normal grounding grid.

Do you have a preliminary understanding of the earth resistance tester? Want to learn more and deeper related knowledge, please pay full attention to the dynamics of GDZX official website.