Product Overview & Application Scenarios
The Ground Grid Earth Resistance Tester is a high - precision instrument designed for measuring the earth resistance and conductivity of large grounding grids. Utilizing advanced frequency conversion interference resistance technology, it delivers accurate measurements of grounding impedance and resistance even in environments with strong electromagnetic interference, ensuring the safe operation of power systems.
This tester is widely used in power systems, communication systems, and lightning protection grounding for buildings. It is particularly suitable for measuring the earth resistance of grounding grids in large substations, power plants, and communication base stations, helping maintenance personnel identify potential grounding system issues promptly and safeguarding both equipment and personnel.
Key Features & Advantages
High - Precision Measurement: Employs frequency conversion interference resistance technology, offering measurement results with a basic error of just 0.005Ω, accurately reflecting the true characteristics of the grounding grid.
Strong Interference Resistance: Utilizes heterodyne measurement and modern software/hardware filtering technology to effectively suppress power frequency interference, ensuring stable and reliable test data.
Multi - Function Integration: Measures not only grounding impedance and resistance but also conduction resistance and soil resistivity. When used with a dedicated frequency selection meter, it can further measure step voltage, transfer potential, and contact voltage, meeting diverse testing needs.
User - Friendly Operation: Features a full Chinese menu interface that is intuitive and easy to understand, with direct display of measurement results, eliminating the need for complex calculations or data analysis.
Lightweight Design: Significantly lighter than traditional power frequency high - current testing equipment, reducing the physical effort required for on - site testing.
Operating Conditions
Environmental Conditions
Temperature: -10℃～50℃
Humidity: ≤90%RH
Altitude: ≤2000m
Testing Conditions
The grounding grid should be in normal operation without abnormal discharge or short circuits.
Avoid testing in severe weather conditions such as thunderstorms and high winds to ensure measurement accuracy and personnel safety.
Additional Information
Quality Assurance: One - year warranty service is provided. If non - human factors cause quality issues within the warranty period, free repairs or part replacements will be offered.
Technical Support: A professional technical team provides comprehensive support, including instrument operation training, technical consultation, and fault diagnosis.
Accessories: Necessary accessories such as measuring lines, power cords, and printer paper are included. Users can optionally equip with a dedicated frequency selection meter and other attachments based on actual needs.
Maintenance & FAQs
Hot Tags: ground grid earth resistance tester, China ground grid earth resistance tester manufacturers, factory, 300kV 5mA DC Hipot Tester, 600kV 30kJ Lightning Impulse Voltage Generator, Power Frequency Withstand Voltage Control Box, Compensation Capacitor Of Resonant Test Set, Cascade Test Transformer, Container AC Resonant Test System
Technical Specifications
Main Unit Parameters
Impedance Measurement Range: 0～5000Ω, Resolution: 0.001mΩ, Measurement Error: ±(Reading×2% +0.005Ω)
Test Current Waveform: Sine wave
Test Current Frequency: 45, 50, 55, 60, 65Hz single frequency, as well as 45/55Hz, 55/65Hz, 47.5/52.5Hz automatic dual - frequency conversion
Output Current: 1, 2, 3, 4, 5A, Maximum Output Voltage: 450V
Measurement Line Requirements: Current line copper core cross - sectional area ≥1.5mm², voltage line copper core cross - sectional area ≥1.0mm²
Power Supply: AC180～270V, 50/60Hz
Dimensions: 355×335×340mm, Weight: 18kg
Frequency Selection Meter Parameters
Measurement Range: 0~600V, Accuracy: ±Reading×1% +0.1mV, Maximum Resolution: 0.001mV
Input Impedance: >500kΩ, Human Body Simulation Resistance: 1500Ω±5%
Measurement Frequency: Corresponds to the earth grid grounding resistance meter, Interference Suppression Ratio: ≥80dB
Battery Operating Time: Approximately 8 hours, Charging Time: Approximately 3 hours, Charging Power Supply: 220V±10%, 50Hz/60Hz
Weight: 0.5kg
