Product introduction
Wuhan UHV Power Technology Co.,Ltd., is a professional manufacturer and supplier of high-voltage power testing equipment in China.The ground resistance measuring instrument is a new type of ground resistance measuring instrument, which combines the three-end button and four-end button measuring methods by using advanced medium and large scale integrated circuit instead of the traditional manual manual power generation.
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.
The earth resistance measuring instrument is suitable for measuring the earth resistance of various devices and the conductor resistance value of low resistance in electric power, post and telecommunication, railway, communication, mining and other departments. The table also measures soil resistivity and ground voltage.
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Production functions
Ground resistance measurement — Measures the ground resistance of grounding systems and grounding electrodes. Core measurement function with a range of 0 to 200Ω.
Low resistance measurement — Measures the resistance of low-resistance conductors.
Soil resistivity measurement — Used for measuring soil resistivity, applicable to grounding system design and grounding performance evaluation.
AC voltage measurement — Measures on-site AC / power frequency voltage with a range of 0 to 19.99V, assisting in evaluating power frequency interference at the grounding test site.
기술적인 매개변수
| 정황 | 환경 온도 | 0℃～+45℃ |
| 상대습도 | 85%RH 이하 | |
| 측정 범위 및 정전류(RMS)) | 저항 | 0~2Ω(10mA), 2~20Ω(10mA), 20~200Ω(1mA) |
| 전압 | AC0~19.99V | |
| 측정 정확도 및 분해능 | 정도 | 0~0.2Ω≤±3%±1d |
| 0.2Ω~199.9Ω≤±1.5%±1d | ||
| 1~19.99V≤±3%±1d | ||
| 해결 | 0.001Ω、0.01Ω、0.1Ω、0.01V | |
보조로 인한 측정 오류 접지 저항 및 접지 전압 | 보조접지저항 허용 | RC(C1과 C2 사이) |
| 0~2Ω, 2~20Ω≤1kΩ | ||
| 20~200Ω≤2kΩ | ||
| RP(P1과 P2 사이) < 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)배터리 | |
| 교류 | 220V/50Hz | |
| 부피와 무게 | 치수 | 220×200×105mm3 |
| 무게 | 1.4kg 이하 |
아무것도 아님케이이름：접지 저항 측정기; Earth Resistance Mete
특징
1、접지 저항 측정기는 고강도 알루미늄 합금을 케이스로 사용하여 제작되었습니다. 산업 주파수 및 RF 간섭을 방지하기 위해 위상 고정 루프 동기 추적 및 감지 모드가 회로에 채택되고 스위치 커패시터 필터가 장착되어 장비의 간섭 방지 기능이 향상됩니다.
2、DC/AC 변환 기술을 채택하여 DC를 AC 저주파 정전류로 변환하여 측정이 용이합니다.
3、 보조접지저항 0~1.8k 허용오(RC), 0 ~ 40K오(RP)는 측정 결과에 영향을 미치지 않습니다.
4、접지 저항 측정기는 접지 저항을 측정하는 것 외에도 수동 조정 및 균형, 3(1/2) 위치 LCD 디스플레이가 필요하지 않지만 낮은 저항 도체 저항, 토양 저항 및 AC 전압도 측정할 수 있습니다. 테스트 회로에 &ldquo가 헤더에 표시되지 않는 경우; 1 & 전체적으로; 기존의 측정 습관에 맞춰 오버플로를 나타냅니다.
Application Scenarios
Substation grounding system testing
Used for testing the grounding resistance of grounding grids and grounding devices in substations and distribution stations.
Power equipment grounding testing
Used for grounding performance testing of electrical equipment such as transformers, switchgear, distribution cabinets, and motors.
Lightning protection grounding testing
Used for grounding resistance testing of lightning protection devices on buildings, equipment rooms, communication facilities, and other structures.
Building grounding system testing
Used for grounding system testing of factories, office buildings, residential buildings, and large structures.
Communication base station grounding testing
Used for grounding resistance testing of facilities such as communication base stations and communication rooms.
New energy power plant grounding testing
Used for grounding system testing of photovoltaic power plants, wind farms, energy storage power stations, and similar facilities.
Grounding system construction acceptance
After completion of new grounding systems, used to measure grounding resistance and determine whether design requirements have been met.
Grounding system operation and maintenance inspection
Used for regular grounding resistance testing in power, telecommunications, industrial enterprises, and other facilities to identify abnormal grounding performance.
Soil resistivity testing
Before constructing a grounding system, used to measure on-site soil resistivity, providing a basis for the design of grounding electrodes and grounding grids.
Frequently Asked Questions
Q:Is the tester suitable for electrical environments with interference?A:Yes. The tester uses filtering and phase-locked detection technology to improve resistance to power-frequency and RF interference.
Q:Does it require manual balancing before testing?
A:No. The instrument uses an automatic measurement and balancing system, which simplifies field operation.
Q:What applications is it suitable for?A:It is suitable for grounding tests in power systems, substations, buildings, lightning protection systems, communication base stations, industrial facilities, and renewable energy plants.
