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.
피roduct 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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기술적인 매개변수
| 근무 조건 | 주변 온도 | 0℃～+45℃ |
| 상대습도 | 85%RH 이하 | |
Measurement range and constant current value (effective value) | 저항 | 0～20Ω(10mA)，2～200Ω(1mA)，20～2000Ω(0.1mA) |
| 전압 | AC0~19.99V | |
| 측정 정확도 및 분해능 | Precision rowspan | 0~0.2Ω≤±3%±1d |
| 0.2Ω～1999.9Ω≤±1.5%±1d | ||
| 1~19.99V≤±3%±1d | ||
| 해결 | 0.01Ω、0.1Ω、1Ω、0.01V | |
보조로 인한 측정 오류 접지 저항 및 접지 전압 | 보조접지저항 허용 | RC(between C1 and C2) |
| 0～20Ω≤1kΩ | ||
| 20～2000Ω≤2kΩ | ||
| RP(between P1 and P2) < 40kΩ， Error≤±5% | ||
허용 접지 전압(유효 전원 주파수 값) | ≤5V， Error≤±5% | |
| 전력 및 전력 소비 | 최대 전력 손실 | 2W 이하 |
| DC | 8 × 1.5V (AA, R6) battery | |
| 교류 | 220V/50Hz | |
| volume and weight | 치수 | 220×200×105mm3 |
| 무게 | 1.4kg 이하 |
N별명: 토양 저항력 시험기; 토양 저항 측정기
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.
특징
1 고강도 알루미늄 합금 쉘 본체, 위상 고정 루프 및 스위치드 커패시터 필터가 장착된 회로, 이를 기반으로 기기가 전력 주파수 및 무선 주파수 간섭을 차폐하는 데 효과적인 역할을 합니다.
2 DC/AC 변환기는 측정을 위해 DC 전류를 AC 저주파 정전류로 변환할 수 있습니다.
3 Auxiliary grounding resistance can change in the range of 0 ~ 2KΩ (RC), 0 ~ 40KΩ (RP), that will not affect measurement results.
4 0으로 수동 조정하지 않고 3.5비트 LED 디스플레이를 사용하여 접지 저항, 낮은 저항의 도체 저항, 토양 저항률 및 AC 접지 전압을 측정하는 데 장비를 사용할 수 있습니다. 테스트된 루프에 오류가 발생하면 화면에 기존 측정 방식과 일치하는 넓은 범위를 나타내는 "1"이 표시됩니다.
15. 테스트 정확도를 보장하기 위해 배터리 저전압에 대한 지능형 프롬프트.
16. 작은 크기와 가벼운 무게.
