LQ-801 Ground Network Earth Resistance Tester: High-Precision Substation Testing

The LQ-801 Ground Network Earth Resistance Tester revolutionizes large-scale grounding system diagnostics with 0.005Ω precision and 3A frequency-conversion technology. Designed for power utilities and substations, it eliminates the need for 30A test currents while maintaining accuracy in live-grid environments.

Technical parameter

Industry Challenges Solved

Traditional power frequency methods require:

• Bulky 30A+ test equipment

• Complex disconnection procedures

• Extended downtime during measurements

The LQ-801 addresses these with:

• Microprocessor-controlled变频 (frequency conversion) AC power supply

• 50Hz anti-interference technology for live-grid testing

• 1/6th the test current (3A vs. 30A) with equal accuracy

Key Features

1. Advanced Measurement Capabilities

• Ultra-high accuracy: 0.005Ω error margin

• Multi-parameter testing: Ground impedance, contact/step voltage, soil resistivity

• Wide application range: 4Ω (substations) to 10Ω (lightning rods)

2. Smart Operation

• Automatic filtering: Isolates 50Hz grid interference

• No power shutdown: Safe for energized systems

• Data integrity: 99% accuracy in 500kV+ substations

3. Efficiency Gains

• 70% faster setup vs. traditional tripole method

• 50% reduction in crew size requirements

• Integrated voltage/current sensors eliminate manual calculations

Technical Specifications

• Test Current: 1-3A (frequency conversion)

• Accuracy: ±(0.5%+0.005Ω)

• Frequency Range: 40-70Hz (auto-adaptive)

• Safety Standard: IEC 61557-5

Note: Includes 3-year calibration warranty and on-site training support for utility crews.