Key Features

High-Current Grounding Continuity Testing

Supports selectable test currents of 2.5A, 5A, 10A, 20A, and 40A, providing flexible testing for different grounding conductor and connection requirements.

Ultra-Low Resistance Measurement

The instrument provides a minimum resolution of 0.1μΩ, enabling accurate detection of small changes in grounding connection resistance.

Wide Measurement Range

Different test-current levels provide measurement ranges from 100μΩ to 8Ω, covering a wide range of grounding continuity applications.

High Measurement Accuracy

Measurement accuracy reaches ±(0.5% + 2 digits), supporting reliable evaluation of grounding connection conditions.

Large Test Data Storage

Built-in memory can store up to 1,000 test records, making it convenient for field testing, maintenance documentation, and historical data management.

Portable Field-Test Configuration

The instrument uses a rugged portable case design with a dedicated test-lead case, making it convenient for transportation and on-site testing in substations and power facilities.

LCD Display

The integrated LCD provides clear visualization of test parameters and measurement results.

Customizable Test Leads

The standard test lead is 13 m, with customized cable lengths available according to application requirements.

Applications

The HYR20D-40D-50D is suitable for:

• Substation grounding continuity testing
• Power plant grounding system inspection
• Transformer grounding connection testing
• Switchgear grounding testing
• Electrical cabinet protective-earth testing
• Power transmission and distribution equipment
• Grounding conductor continuity testing
• Electrical equipment commissioning
• Preventive maintenance
• Periodic grounding safety inspections
• Low-resistance connection testing

Technical Specifications