The KDYZ-301 is a professional online tester for zinc oxide (MOA) lightning arresters, designed to measure leakage current, resistive current, and 3rd–7th harmonic currents during operation. It uses isolated voltage/current sensors (input impedance <1Ω) for safe, reliable data acquisition, supporting multiple voltage reference sampling modes (wired, wireless, induction, no-voltage sync). Equipped with an 800×480 touchscreen, thermal printer, and 10000mAh lithium battery, it enables three-phase simultaneous testing, wireless transmission up to 400m, and generates Word reports via upper software, making it ideal for power system maintenance and quality control.

• Four voltage reference sampling modes: wired sync, wireless sync, induction plate sync, and no-voltage sync for flexible field deployment.
• Isolated voltage/current signals (input impedance <1Ω) ensure data reliability and operator safety.
• Three-phase simultaneous testing with automatic calculation, eliminating the need for manual compensation.
• AC/DC dual-use design with a built-in high-capacity lithium battery, perfect for off-grid field environments.
• Upper software support for generating Word reports to 直观 assess arrester health status.
• Windows-based control with external mouse/keyboard support for intuitive operation.
• Stores up to 1000 test sets internally, with USB port for U-disk data backup and expansion.

• Reference Voltage Input Range (Peak): 20V–250V, Accuracy ±(2% reading + 5 digits)
• Total Leakage Current Range (Peak): 100μA–10mA, Accuracy ±(2% reading + 5 digits)
• Resistive Current Range (Peak): 100μA–10mA, Accuracy ±(5% reading + 5 digits) (secondary method, no inter-phase interference)
• Capacitive Current Range (Peak): 100μA–10mA, Accuracy ±(5% reading + 5 digits)
• Current Harmonic Accuracy: ±(10% reading + 10μA)
• Current Channel Input Resistance: ≤2Ω
• Electric Field Strength Range: 30kV/m–300kV/m, Total Harmonic Content <30%
• Electric Field Strength Accuracy: ±(10% reading)
• Angle Measurement Range: 0°–360°
• Power Consumption: 4W
• Power Supply: AC220V/50Hz; DC12V (10000mAh lithium battery)
• Battery Life: >4h continuous operation, >8h intermittent operation
• Wireless Transmission Distance: 400m
• Dimensions: 360mm × 300mm × 150mm (main unit)
• Weight: 18kg (gross weight)
• Display: 800×480 color touchscreen with high-speed thermal printer
• Compliance Standard: DL474.5-92 (China Power Industry Standard)