HV Cable Grounding Loop Resistance Live Tester System

HV Cable Grounding Loop Resistance Live Tester System

The MOEORW-WRT910L High-Voltage Cable Grounding Circuit Resistance Live-Line Diagnostic System is a professional live-line diagnostic device for high-voltage cable grounding circuits, accurately detecting the grounding status of the line. It features live-line detection, wireless control, strong anti-interference capabilities, and adaptability to complex power environments. It is suitable for resistance detection and fault diagnosis of high-voltage cable cross-interconnections and single-end grounding circuits.

Our company has developed a system capable of detecting the grounding status of the outer metal sheath of cables without power interruption: the Cable Outer Metal Sheath Grounding Status Diagnostic System (hereinafter referred to as the Diagnostic System). The Diagnostic System utilizes various measurement technologies to detect the grounding status of cross-connection and single-end grounding connections in high-voltage cable lines.

The diagnostic system consists of a grounding resistance tester, a smart PAD terminal, and various accessories.

1. Smart PAD terminal and measurement and diagnostic software

The intelligent PAD terminal serves as the main operating unit of the diagnostic system, pre-installed with measurement and testing software and a wireless remote control testing device, enabling automatic measurement, analysis, and diagnosis of the grounding circuit resistance of high-voltage cable lines.

2. Grounding resistance tester

The resistance data of the high-voltage cable grounding loop is measured and collected, and then sent to the smart PAD terminal via Bluetooth.

3. Specifications of main testing accessories

4.Environmental conditions

• The diagnostic system utilizes the latest digital processing technology, FFT (Fast Fourier Transform) technology, and AFC (Automatic Frequency Control) technology, combined with new grounding resistance detection standards, to detect the grounding status of the outer metal sheath of cables. It has unique anti-interference capabilities and adaptability to complex environments.
• Cross-connection loop resistance detection and analysis
• Based on the characteristics of cross-connection circuits, a dual-clamp method (measuring clamp and excitation clamp) is used with AFC automatic frequency selection technology and coupling measurement principle to detect the circuit resistance of cross-connection circuits. The circuit resistances of phases A, B, and C are tested separately. According to relevant testing standards and specifications, the diagnostic system automatically analyzes and diagnoses the health status of the line and displays green, yellow, and red alarm messages according to the results.
• Loop resistance detection and analysis in single-ended grounding mode
• Based on the characteristics of single-ended grounding circuits, the resistance of phases AB, AC, and BC is tested using the four-wire method. According to relevant testing standards and specifications, the diagnostic system automatically analyzes and diagnoses the health status of the line and displays green, yellow, and red alarm messages based on the results.
• Live testing
• Regardless of whether the high-voltage cable line is in operation, the system can detect the loop resistance of both cross-connection and direct grounding methods. The power output of the grounding resistance tester is relatively small and will not affect the high-voltage cable line.
• Wireless connectivity, easy to operate, automatic measurement
• The grounding resistance tester and the smart PAD terminal communicate via Bluetooth, and the measurement can be performed automatically by operating the smart PAD terminal.
• Large jaw design
• The clamp jaws are 70mm in diameter (standard configuration), which is suitable for use with flat iron/steel as grounding leads.