Product introduction
Wuhan UHV Power Technology Co.,Ltd., is a professional manufacturer and supplier of high-voltage power testing equipment in China.Didital ground resistance tester rejects the traditional manual manual power generation method, adopts advanced medium and large scale integrated circuit, and applies DC/AC conversion technology to combine the three-end button and four-end button measurement mode into a new type of Ground Resistance meter..
The working principle is that the DC/AC converter in the machine changes DC into low-frequency constant current of AC, and the circuit is formed by auxiliary ground electrode C and measured object E, which generates AC voltage drop on the measured object, and is fed into AC amplifier for amplification through auxiliary ground electrode P, and then sent to the meter head for display through detection. With the aid of multiplying power switch, three different quantity limit can be obtained: 0 ~ 2 Ω, 0 ~ 20 Ω, 0 ~ 200 Ω.
Didital ground resistance tester is suitable for measuring Ground Resistance of various devices and conductor Resistance of low Resistance in electric power, post and telecommunications, railway, communication, mining and other sectors; Didital ground resistance tester also measures soil resistivity and Ground voltage.
Product functions
Ground resistance testing: Accurately measures the ground resistance of grounding electrodes and grounding systems to determine whether grounding performance meets requirements.
Soil resistivity testing: Uses the four-wire method to measure soil resistivity, providing data basis for grounding grid design and grounding engineering construction.
Low resistance testing: Measures the resistance of grounding conductors, metal conductors, and connection points to check whether connections are reliable.
AC grounding voltage testing: Detects the AC voltage of the on-site grounding system, assisting in evaluating the grounding environment and interference conditions.
Anti-interference testing: Features power frequency and radio frequency interference suppression capability, suitable for complex on-site environments such as substations, distribution rooms, and grounding grids.
Four-wire precision measurement: Reduces the influence of test leads and contact resistance on measurement results, improving the accuracy of ground resistance and soil resistivity testing.
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技術的パラメータ
| 労働条件 | 周囲温度 | 0℃～+45℃ |
| 相対湿度 | ≤85%RH | |
Measurement range and constant current value (effective value) | 抵抗 | 0～20Ω(10mA)，2～200Ω(1mA)，20～2000Ω(0.1mA) |
| 電圧 | AC0～19.99V | |
| 測定精度と分解能 | Precision rowspan | 0～0.2Ω≦±3%±1d |
| 0.2Ω～1999.9Ω≤±1.5%±1d | ||
| 1～19.99V≦±3%±1d | ||
| 解決 | 0.01Ω、0.1Ω、1Ω、0.01V | |
補助機器による測定誤差 接地抵抗と接地電圧 | 補助接地抵抗を許容する | RC(between C1 and C2) |
| 0～20Ω≤1kΩ | ||
| 20～2000Ω≤2kΩ | ||
| RP(between P1 and P2) < 40kΩ， Error≤±5% | ||
許容対地電圧（実効値） 電源周波数の値) | ≤5V， Error≤±5% | |
| 電力と消費電力 | 最大電力損失 | ≤2W |
| 直流 | 8 × 1.5V (AA, R6) battery | |
| 交流 | 220V/50Hz | |
| volume and weight | 寸法 | 220×200×105mm3 |
| 重さ | ≤1.4kg |
Nニックネーム： 土壌抵抗率試験機; 土壌抵抗率計
Application Scenarios
Substations: Testing the performance of substation grounding grids and grounding systems.
Transmission and distribution lines: Testing the grounding resistance of transmission towers and distribution equipment.
Power equipment grounding: Testing the grounding condition of transformers, switchgear, and other equipment.
Building grounding systems: Testing lightning protection grounding, protective grounding, and other building grounding systems.
Communication base stations: Testing the grounding resistance and grounding system performance of communication base stations.
Grounding grid construction and acceptance: Measuring soil resistivity to provide a basis for grounding grid design, construction, and acceptance.
Lightning protection grounding testing: Testing lightning rods, surge arresters, and lightning protection grounding devices.
Industrial sites: Testing the grounding condition of factory equipment, distribution systems, and large machinery.
Grounding system maintenance: Used for periodic inspections to identify abnormal ground resistance or grounding connection issues.
Frequently Asked Questions
Q: Why is it necessary to measure soil resistivity before grounding grid design?
A: Soil resistivity is important basic data for grounding grid design, helping to determine the arrangement of grounding electrodes and the grounding scheme.
Q: Can it be used for newly built grounding systems?
A: Yes. It can be used for soil resistivity testing before construction, during construction inspection, and for ground resistance acceptance testing after completion.
Q: What is the biggest feature of this device?
A: It combines ground resistance and soil resistivity testing in a single device, while also supporting low resistance and AC grounding voltage testing.
特徴
1 高強度アルミニウム合金シェルボディ、フェーズロックループとスイッチトキャパシタフィルタを備えた回路。これに基づいて、機器は電源周波数と無線周波数干渉をシールドするのに効果的な役割を果たします。
2 DC/AC コンバータは、測定用に DC 電流を AC 低周波定電流に変換できます。
3 Auxiliary grounding resistance can change in the range of 0 ~ 2KΩ (RC), 0 ~ 40KΩ (RP), that will not affect measurement results.
4 手動でゼロに調整することなく、3 ビット半の LED ディスプレイを備えたこの機器は、接地抵抗、低抵抗の導体抵抗、土壌抵抗率、および AC 接地電圧の測定に使用できます。 テストされたループに障害が発生した場合、画面には広い範囲を示す「1」が表示されます。これは従来の測定方法と一致しています。
15. テストの精度を確保するためのバッテリー不足電圧のインテリジェントなプロンプト。
16. 小型、軽量です。
