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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Parâmetros técnicos
| Condições de trabalho | Temperatura ambiente | 0℃～+45℃ |
| Humidade relativa | ≤85% UR | |
Measurement range and constant current value (effective value) | Resistência | 0～20Ω(10mA)，2～200Ω(1mA)，20～2000Ω(0.1mA) |
| Tensão | AC0~19,99V | |
| Precisão e resolução de medição | Precision rowspan | 0~0,2Ω≤±3%±1d |
| 0.2Ω～1999.9Ω≤±1.5%±1d | ||
| 1~19,99V≤±3%±1d | ||
| Resolução | 0.01Ω、0.1Ω、1Ω、0.01V | |
Erro de medição causado por auxiliar resistência de aterramento e tensão de aterramento | Permitir resistência de aterramento auxiliar | RC(between C1 and C2) |
| 0～20Ω≤1kΩ | ||
| 20～2000Ω≤2kΩ | ||
| RP(between P1 and P2) < 40kΩ， Error≤±5% | ||
Tensão de terra permitida (efetiva valor da frequência de energia) | ≤5V， Error≤±5% | |
| Energia e consumo de energia | Perda máxima de potência | ≤2W |
| CC | 8 × 1.5V (AA, R6) battery | |
| AC | 220V/50Hz | |
| volume and weight | Dimensões | 220×200×105mm3 |
| Peso | ≤1,4kg |
Napelido: Testador de Resistividade do Solo; medidor de resistividade do solo
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.
Características
1 Corpo em liga de alumínio de alta resistência, o circuito equipado com loop de bloqueio de fase e filtro de capacitor comutado, com base no qual o instrumento desempenha um papel eficaz na proteção de frequência de energia e interferência de radiofrequência.
2 O conversor DC/AC pode transformar a corrente DC em corrente constante AC de baixa frequência para a medição.
3 Auxiliary grounding resistance can change in the range of 0 ~ 2KΩ (RC), 0 ~ 40KΩ (RP), that will not affect measurement results.
4 Sem ajuste manual para zero, com display LED de três bits e meio, o instrumento pode ser utilizado para medir a resistência de aterramento, a resistência do condutor de baixa resistência, a resistividade do solo e a tensão de terra CA. Se o loop testado encontrar falha, a tela exibirá "1" indicando uma grande faixa, o que é consistente com as práticas de medição convencionais
15. Alerta inteligente de subtensão da bateria para garantir a precisão do teste.
16. Tamanho pequeno e peso leve.
