With urban network development, power bureaus, construction teams, and design institutes frequently encounter 110kV XLPE cables. Due to time constraints and limited experience, many cable outer sheaths fail the withstand voltage test (10kV/1min). The external protective layer typically uses HDPE sheath material, which passes DC 25kV/5min withstand voltage tests during manufacturing with leakage current below dozens of µA.

Defects often occur during installation, including external damage during filling and covering processes. Common issues include termite damage, water ingress in ground boxes, deterioration of existing defects, and reduced insulation resistance due to moisture penetration in grounding wires. Some defects remain unresolved for years due to deep cable burial or complex surrounding conditions, creating potential operational hazards.

• Adjustable voltage and frequency
• Over current protection
• Single-button switching between pinpointing and withstand testing with no blind area
• Adjustable receiver sensitivity
• Adjustable signal frequency with zero protection
• Test range without blind area