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.
Parámetros técnicos
| Condiciones | La temperatura ambiente | 0℃～+45℃ |
| Humedad relativa | ≤85% HR | |
| Rango de medición y corriente constante (RMS)) | Resistencia | 0～2Ω(10mA),2～20Ω(10mA),20～200Ω(1mA) |
| Voltaje | CA0~19,99V | |
| Precisión y resolución de la medición | Precisión | 0~0,2Ω≤±3%±1d |
| 0,2Ω~199,9Ω≤±1,5%±1d | ||
| 1~19,99V≤±3%±1d | ||
| Resolución | 0,001 Ω, 0,01 Ω, 0,1 Ω, 0,01 V | |
Error de medición causado por auxiliar. Resistencia de puesta a tierra y tensión de tierra. | Permitir resistencia de puesta a tierra auxiliar | RC(Entre C1 y C2) |
| 0~2Ω,2~20Ω≤1kΩ | ||
| 20~200Ω≤2kΩ | ||
| RP (entre P1 y P2) <40kΩ, error≤±5% | ||
Voltaje de tierra permitido (efectivo valor de la frecuencia industrial) | ≤5V, error≤±5% | |
| Energía y consumo de energía. | Pérdida de potencia máxima | ≤2W |
| corriente continua | 8 pilas de 1,5 V (AA, R6). | |
| C.A. | 220V/50Hz | |
| Volumen y peso | Dimensiones | 220×200×105mm3 |
| Peso | ≤1,4 kg |
Nadaknombre：medidor de resistencia a tierra; Earth Resistance Mete
Características
1、El instrumento de medición de la resistencia a tierra está construido con una aleación de aluminio de alta resistencia como carcasa. Para evitar la frecuencia industrial y la interferencia de RF, se adopta en el circuito el modo de detección y seguimiento síncrono de bucle de bloqueo de fase, y el filtro del condensador del interruptor está equipado para que el instrumento tenga una mejor capacidad antiinterferencia.
2、Se adopta la tecnología de conversión CC/CA para convertir CC en corriente constante de baja frecuencia CA para facilitar la medición.
3、 Permitir una resistencia de puesta a tierra auxiliar de 0 ~ 1,8kVaya(CR), 0 ~ 40KOh(RP) no afectará el resultado de la medición.
4、El instrumento de medición de resistencia a tierra no necesita ajuste ni equilibrio manual, pantalla LCD de 3 (1/2) posiciones, además de medir la resistencia a tierra, pero también puede medir la resistencia del conductor de baja resistencia, la resistividad del suelo y el voltaje de CA. Si el circuito de prueba no muestra " en el encabezado; 1 y en todas partes; Significa desbordamiento, en línea con los hábitos de medición convencionales.
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.
