Product Introduction

The HCJDR-50A Grounding Wire Group Resistance Tester is a high-precision testing instrument developed in accordance with the *Technical Standards for Portable Short-Circuit Grounding Wires* and the *Preventive Testing Regulations for Power Safety Tools*. It is primarily designed to measure the DC resistance of portable short-circuit grounding wires and personal protective grounding wires. Controlled by a high-speed single-chip microcontroller, the instrument features functions such as constant current output, automatic measurement, data storage, and printing. It enables the rapid and accurate assessment of whether grounding wires meet safety requirements, thereby effectively preventing substandard grounding wires from entering the power system and ensuring the safety of personnel engaged in equipment maintenance and line operations.

Technical Parameters

Product Features

◆ Intelligent Control, Simple Operation: Controlled by a high-speed microcontroller, featuring a Chinese-language LCD display (128×64 dot matrix) and intuitive keys for selection, confirmation, and reset, ensuring a user-friendly human-machine interface.

◆ Stable Output, Rapid Measurement: Employs advanced power supply technology to deliver a constant output current (selectable at 50A, 40A, or 30A) with an output voltage of ≥10V DC; offers rapid measurement speeds and a wide measurement range (200μΩ to 300mΩ).

◆ Data Storage and Retrieval: Equipped with a built-in real-time clock and perpetual calendar, capable of storing up to 20 sets of test data for convenient retrieval of historical records at any time.

◆ Comprehensive Protection Functions: Features automatic protection against power supply overheating and alerts for reverse voltage-line connections, effectively preventing operational errors that could damage the instrument or compromise measurement accuracy.

◆ Intelligent Power Management: Automatically operates in a low-power mode to minimize internal heat generation and conserve energy.

◆ On-site Printing: Includes a built-in thermal printer that allows for the real-time printing of test results, facilitating convenient on-site record-keeping and archiving.