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China Manufacture Digital Earth Resistance Tester with Voltmeter and Ammeter1
Meter for ElectricityGround Resistance MeterLarge Grid Tester
Wuhan Hertz Power Equipment Co., Ltd
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Product Description Product DescriptionAt present, in the power system, the earth network grounding resistance test is mainly used in the industrial frequency high current three-pole method of measurement. In order to prevent the power grid operation frequency interference, improve the accuracy of the measurement results, insulation preventive test regulations: frequency current method of the test current shall not be less than 30 A. As a result, the test equipment is bulky, the test process is complex, the test personnel work intensity, test time is long and many other problems.Large ground network grounding resistance tester adopts a new type of frequency conversion AC power supply, and the use of microcomputer processing control HZDW-III large ground network grounding resistance tester and signal processing and other measures, a good solution to the problem of anti-interference in the test process, simplify the test operation process, improve the accuracy and precision of the test results, and greatly reduce the labour intensity of the test personnel and test costs.HZDW-III large ground network grounding resistance tester is a special instrument for measuring ground network grounding resistance and grounding conductivity between the grounding point. The instrument adopts frequency conversion anti-interference technology without high current measurement, can be measured in the substation under the strong interference environment of 50Hz accurate data, the measurement results by the large screen LCD display, comes with a micro-printer can be printed out. The instrument can measure the ground impedance and ground resistance at the same time, which can truly reflect the actual characteristics of the ground network.Product Features1. Good power frequency equivalence2. Strong anti-interference capability3. High precision.The basic error is only 0.005Ω 4. Can measure the grounding resistance of current piles,voltage piles,ground grids,continuity resistance and resistance,and soil resistivity.When used with the dedicated frequency selective voltmeter,it can measure step voltage,transfer potential,and contact voltage with higher anti-interference capability and accuracy5. Full English menu operation,directly displaying measurement results.6. Low wiring labor:No need for large current lines.7. Full touch LCD display, large full graphic interface, every process is very clear and concise.8.The internal calendar chip and large capacity memory allow the results to be saved at any time.Detailed PhotosTechnical ParametersI. HZDW-III Technical Parameters:1. Measuring range: 0~5000Ω (including current pile impedance);2. Resolution: 0.001mΩ;3. Measurement error: ± (reading × 2% + 0.005Ω);4, anti-industrial frequency 50Hz voltage interference capability: 10V interference suppression ratio: ≥ 60dB;5. Test current waveform: sine wave;6. Test current frequency: single-frequency: 40-70Hz resolution 0.1Hz arbitrary settings; Dual-frequency: 50±0.1Hz to 50±10.0Hz arbitrary settings; 60±0.1Hz to 60±10.0Hz arbitrary settings;7. Output current: 5A or external power supply 30A;8. Output voltage: 400V or external power supply 1000V;9. Measuring line requirements: current line copper core cross-sectional area ≥ 1.5mm2; voltage line copper core cross-sectional area ≥ 1.0mm2.10. Test power supply: built-in 2kW frequency conversion power supply or external high-power frequency conversion power supply;11. Power supply: AC220V±10%, 50Hz;12. External dimensions: 500mm * 377mm * 330mm Instrument weight: 20kg.II. HZ-80D Frequency Selection Voltage and Current Meter Technical Parameters:1.Voltage measurement range: 0-200V Resolution: 0.001mV;Error: ± (reading × 2% + 0.1mV).2. Current measurement range: 0-20A Resolution: 0.001A;Error: ± (reading × 2% + 0.01A).3. Frequency selection range: any frequency within 40-70Hz can be measured.4. Input impedance: >500kΩ Human body analogue resistance: 1500Ω±5%.5. Wireless transmission: field of view distance 5000m. 1000 metres in the substation.6. Resistance to industrial frequency 50Hz interference: 10000 times interference, the measurement accuracy can reach 5%.7.Battery working time: about 8-12 hours Charging time: about 3 hours.8. Charging power supply: AC220V±10%, 50Hz/60Hz.9.External dimension: 320mm*275mm*140mm .10.Instrument weight: 3kg.Product DimensionCompany ProfileSimilar RecommendationFAQQ1:Is your company a sales or a manufacturer? We are an integrated trade and manufacturing company with our own factory. Q2:If we need to customize our own brand or if there are special requirements for the built-in software of the machine, can it be customized?Yes, we accept OEM/ODM/OBM and can customize the built-in software of the product according to the customer's special requirements.Q3:What is the usual lead time? How long can we receive the order after placing it?In normal circumstances, products in stock can be received within 5 to 7 days via the fastest international express. Other situations may vary depending on the quantity of products ordered, whether there are special customization requirements, and the delivery time chosen.Q4:How can we ensure that the product will not be damaged during transportation, considering the large size of the product?We have professional internal and external packaging to ensure the safety and stability of the products during transportation. For fragile or other special parts, we will include an extra set to ensure that the customer can use the product immediately upon receipt.Q5:How do you handle after-sales service? What if there is a quality problem with the product or if the customer does not know how to operate it? For quality issues that are not caused by human error, we provide a one-year warranty from the time the product is delivered, and lifetime technical support. Other after-sales issues will be addressed by our professional technical staff within 24 hours. The product comes with a user manual and an operation video.
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