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.
פרמטרים טכניים
| תנאים | טמפרטורת הסביבה | 0℃～+45℃ |
| לחות יחסית | ≤85%RH | |
| טווח מדידה וזרם קבוע (RMS)) | הִתנַגְדוּת | 0～2Ω(10mA)，2～20Ω(10mA)，20～200Ω(1mA) |
| מתח | AC0~19.99V | |
| דיוק ורזולוציה של מדידה | דיוק | 0～0.2Ω≤±3%±1d |
| 0.2Ω～199.9Ω≤±1.5%±1d | ||
| 1~19.99V≤±3%±1d | ||
| פתרון הבעיה | 0.001Ω、0.01Ω、0.1Ω、0.01V | |
שגיאת מדידה נגרמת על ידי עזר התנגדות הארקה ומתח הארקה | אפשר התנגדות הארקה עזר | RC(בין C1 ל-C2) |
| 0～2Ω，2～20Ω≤1kΩ | ||
| 20~200Ω≤2kΩ | ||
| RP( בין P1 ל-P2) < 40kΩ，שגיאה≤±5% | ||
מתח הארקה מותר (יעיל ערך תדר החשמל) | ≤5V，שגיאה≤±5% | |
| צריכת חשמל וצריכת חשמל | אובדן חשמל מקסימלי | ≤2W |
| זֶרֶם יָשָׁר | 8×1.5V(AA，R6) סוללה | |
| AC | 220V/50Hz | |
| נפח ומשקל | ממדים | 220×200×105 מ"מ3 |
| מִשׁקָל | ≤1.4 ק"ג |
שום דברקשֵׁם：מד התנגדות קרקע; Earth Resistance Mete
מאפיינים
1、מכשיר מדידת ההתנגדות להארקה בנוי עם סגסוגת אלומיניום בעלת חוזק גבוה כמארז. על מנת למנוע תדר תעשייתי והפרעות RF, מצב המעקב והזיהוי הסינכרוני של לולאה נעילת פאזה מאומצת במעגל, ומסנן קבלי המתג מצויד כדי להפוך את המכשיר ליכולת אנטי-הפרעות טובה יותר.
2、טכנולוגיית המרת DC/AC מאומצת להמרת DC לזרם קבוע בתדר נמוך AC למדידה קלה.
3、 אפשר התנגדות הארקה עזר של 0 ~ 1.8kהו(RC), 0 ~ 40Kאה(RP) לא ישפיע על תוצאת המדידה.
4、מכשיר מדידת התנגדות הארקה אינו זקוק להתאמה ואיזון ידני, תצוגת LCD במיקום 3(1/2), בנוסף למדידת התנגדות כדור הארץ, אך גם יכול למדוד התנגדות מוליכים התנגדות נמוכה, התנגדות קרקע ומתח AC. אם מעגל הבדיקה אינו מציג &ldquo בכותרת; 1 & לאורך; מייצג הצפה, בהתאם להרגלי המדידה המקובלים.
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.
