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HZDW-5A Large Grounding Resistance Tester for Grounding Grid
Product Introduction Currently, in the power system, the grounding resistance of large grounding grids is mainly measured using the power frequency hi
Product details
Product IntroductionProduct Introduction
At present, in the power system, the grounding resistance of large grounding grids is mainly measured using the power frequency high current three pole method. In order to prevent power frequency interference during the operation of the power grid and improve the accuracy of measurement results, the insulation preventive test regulations stipulate that the test current of the power frequency high current method shall not be less than 30 amperes. As a result, there are many problems such as bulky testing equipment, complex testing processes, high workload of testing personnel, and long testing times.
The HZDW-5A high-frequency high current large-scale grounding resistance tester can measure the grounding resistance of substations (4 Ω), hydro thermal power plants, microwave stations (10 Ω), and lightning rods (10 Ω). It adopts a new type of high-frequency AC constant current and constant voltage power supply, and adopts measures such as microcomputer processing control and signal processing, which effectively solves the anti-interference problem in the testing process, simplifies the experimental operation process, improves the accuracy and precision of the test results, and greatly reduces the labor intensity and testing cost of the testing personnel.
The HZDW-5A high-frequency high current large-scale grounding resistance tester can measure the grounding resistance of substations (4 Ω), hydro thermal power plants, microwave stations (10 Ω), and lightning rods (10 Ω). It adopts a new type of high-frequency AC constant current and constant voltage power supply, and adopts measures such as microcomputer processing control and signal processing, which effectively solves the anti-interference problem in the testing process, simplifies the experimental operation process, improves the accuracy and precision of the test results, and greatly reduces the labor intensity and testing cost of the testing personnel.
Product ParametersProduct Parameters
| Instrument measurement range | 0~40Ω |
| measurement accuracy | <3% |
| Measure output current | AC 5A |
| Measurement line requirements | ≥Φ4mm2 |
| power supply | AC220V/50HZ |
| Instrument weight | 8kg |
Note:
1. The appearance of the product is subject to the actual product. Technical parameters and models are subject to change without prior notice. If there is any act of theft or copying, legal responsibility will be pursued.
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Product featuresProduct Characteristics
The measured power frequency equivalence is good. The test current waveform is a sine wave with a frequency difference of only 5Hz from the power frequency. Two frequencies, 45Hz and 55Hz, are used for measurement
●Strong anti-interference ability. This instrument adopts the frequency difference method for measurement, combined with modern software and hardware filtering technology, making the instrument have high anti-interference performance and stable and reliable test data
●High precision. The basic error is only 0.005 Ω, which can be used to measure large grounding grids with very low grounding impedance
●Powerful functionality. Measurable current pile, voltage pile, grounding resistance (optional frequency meter for measuring step voltage and contact voltage)
●Easy to operate. Fully Chinese menu style operation, directly displaying measurement results
●Low wiring workload, no need for high current wires
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