Compared with the traditional voltage and current test method, the superior performance of the clamp earth resistance tester is as follows:
Easy to operate:
The grounding resistance value can be read from the LCD screen by wrapping the nipper of the nipper earth resistance tester around the measured grounding wire. However, the traditional voltage and current measurement method must separate the grounding wire from the grounding system and drive the voltage and current poles into the soil as auxiliary electrodes according to the specified distance.
Accurate measurement:
The accuracy of the traditional voltage and current measurement method depends on the position between the auxiliary electrodes and their relative position with the grounding body. In addition, the heterogeneity of soil resistivity between the voltage and current poles and the grounding body will affect the measurement results. If the position of the auxiliary electrode is limited and does not conform to the calculated value, the so-called pole distribution error will occur. For the same grounding body, different auxiliary electrode positions may make the measurement results have a certain degree of dispersion, thus affecting the accuracy of measurement. Using clamp earth resistance tester there is no pole error, as long as in the measurement, the test ring attached to the clamp earth resistance tester is measured, if the reading is accurate, then the measured grounding resistance value is accurate.
Not restricted by the surrounding environment:
The traditional voltage and current test method requires two auxiliary electrodes with relative position requirements, so it has requirements on the surrounding environment, otherwise it will affect the accuracy of measurement. With the development of China's urbanization, it is sometimes difficult to find the soil around the grounding body, they are all covered by cement, and it is sometimes more difficult to find the soil to meet the requirements of the relative position.
The clamp earth resistance tester does not have these limitations. The correct grounding resistance value can be obtained by opening and closing the nipper once. In some cases, the earth fault that cannot be measured by traditional method can be measured.
For example, in multi-point grounded systems (e.g. towers, etc. In addition, some buildings also use more than one grounding body), although the grounding resistance of their grounding body is qualified, but the connection line between grounding body and overhead ground wire may be used for a long time after contact resistance is too large or even circuit breaker. Although the grounding resistance of the grounding body meets the requirements, the grounding system is not qualified.
This is a situation that cannot be measured by conventional methods. It can be measured correctly with the clamp earth resistance tester, because the clamp earth resistance tester is to measure the grounding resistance and the integrated value of the line resistance.
Xin Sheng neng specializes in the production of grounding/insulation series of test equipment, the production of products, models complete, cost-effective products, welcome to call 0312-3188565 consultation!
