High-sensitivity amplification and galvanometer balance bridge system for accurate detection of cable sheath faults.

• Detection of high-resistance breakdown points in laid cables, especially low-resistance linear high-resistance breakdown points
• Identification of flashover-type breakdown points with stable current maintenance
• Detection of low-resistance defects that haven't broken down under operating voltage

• Based on MURRAY bridge principle for precise fault location
• 5000V no-load voltage with 100mA short-circuit current capacity
• High-sensitivity amplifier and galvanometer balance indication
• Special double-core high-voltage rubber cable with four-terminal resistance measurement
• Integrated 12806 display with automatic cable length calculation
• Compact design with high voltage and light weight (5.5kg)
• No blind spots compared to wave reflection method

• No-load voltage: ≤7500V
• Short-circuit current: ≥40mA
• Positioning accuracy: ±(0.1%•L±1)m
• Weight: 5.5kg
• Power supply: AC 220V ±10%, 50Hz ±2Hz and 9V batteries

• Adjustable output voltage with high accuracy and stability
• Zero protection safety feature
• Automatic fault point testing with manual override capability
• No blind area detection for short cables and end-point breakdowns