
The KDYDJ-420kVA 30kV AC Withstand Voltage Test System is a robust, high-capacity testing solution designed for long submersible cables (up to 3000 meters with a core cross-sectional area of 42.5 mm²). It provides precise AC voltage testing up to 30 kV and can sustain this voltage for 10-60 minutes without breakdown, ensuring cable insulation integrity. The system includes advanced safety features like automatic overvoltage/overcurrent protection, fault alarms, and harmonic stabilization.