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.
technische Parameter
| Bedingungen | Die Umgebungstemperatur | 0℃～+45℃ |
| Relative Luftfeuchtigkeit | ≤85 % relative Luftfeuchtigkeit | |
| Messbereich und Konstantstrom (RMS) | Widerstand | 0–2 Ω (10 mA), 2–20 Ω (10 mA), 20–200 Ω (1 mA) |
| Stromspannung | AC0 ~ 19,99 V | |
| Messgenauigkeit und Auflösung | Präzision | 0～0,2Ω≤±3%±1d |
| 0,2 Ω ~ 199,9 Ω ≤ ± 1,5 % ± 1 Tag | ||
| 1 ~ 19,99 V ≤ ± 3 % ± 1 Tag | ||
| Auflösung | 0,001 Ω, 0,01 Ω, 0,1 Ω, 0,01 V | |
Messfehler durch Hilfsmittel verursacht Erdungswiderstand und Erdungsspannung | Zusätzlichen Erdungswiderstand berücksichtigen | RC (zwischen C1 und C2) |
| 0 ~ 2 Ω, 2 ~ 20 Ω ≤ 1 kΩ | ||
| 20～200Ω≤2kΩ | ||
| RP (zwischen P1 und P2) < 40 kΩ, Fehler ≤ ± 5 % | ||
Zulässige Erdspannung (effektiv Wert der Netzfrequenz) | ≤5V, Fehler≤±5% | |
| Leistung und Stromverbrauch | Maximaler Leistungsverlust | ≤2W |
| Gleichstrom | 8×1,5V(AA,R6)Batterie | |
| Wechselstrom | 220V/50Hz | |
| Volumen und Gewicht | Maße | 220×200×105mm3 |
| Gewicht | ≤1,4 kg |
NichtskName：Bodenwiderstandsmesser; Earth Resistance Mete
Merkmale
1、Das Erdungswiderstandsmessgerät besteht aus einer hochfesten Aluminiumlegierung als Gehäuse. Um industrielle Frequenz- und HF-Interferenzen zu verhindern, wird in der Schaltung der Phasenregelkreis-Synchronverfolgungs- und Erkennungsmodus übernommen, und der Schaltkondensatorfilter ist so ausgestattet, dass das Instrument über eine bessere Entstörungsfähigkeit verfügt.
2、Die DC/AC-Umwandlungstechnologie wird eingesetzt, um Gleichstrom zur einfachen Messung in niederfrequenten Wechselstrom umzuwandeln.
3、 Ermöglichen Sie einen zusätzlichen Erdungswiderstand von 0 bis 1,8 kOhmOh(RC), 0 ~ 40KOh(RP) darf das Messergebnis nicht beeinflussen.
4、Das Erdungswiderstandsmessgerät benötigt keine manuelle Einstellung und Balance, 3(1/2)-Positionen-LCD-Display, zusätzlich zur Messung des Erdungswiderstands, kann aber auch den Widerstand niederohmiger Leiter, den Bodenwiderstand und die Wechselspannung messen. Wenn die Testschaltung nicht „in der Kopfzeile“ anzeigt; 1 & durchgehend; Steht für Überlauf, im Einklang mit herkömmlichen Messgewohnheiten.
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.
