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KDYDJ-420kVA 30kV AC Withstand Voltage Test System – Cable AC Withstand Tester
KDYDJ-420kVA 30kV AC Withstand Voltage Test System – Cable AC Withstand Tester

KDYDJ-420kVA 30kV AC Withstand Voltage Test System – Cable AC Withstand Tester

Applications:

  • AC withstand testing of long submersible cables
  • Insulation verification for power transmission lines, transformers, motors, and switchgear
  • Quality assurance in cable manufacturing, power utilities, and industrial plants
  • Preventive maintenance and commissioning tests in electrical infrastructure

  • Response within
    24 hours

  • Free warranty
    12 month

  • On-line training
    Support

Profile:

Designed with user-friendly controls and comprehensive safety measures, the KDYDJ-420kVA integrates a variable frequency control power supply, oil-immersed excitation transformer, dry-type epoxy cast high-voltage reactor, and capacitive divider. Its intelligent control system ensures stable output, automatic tuning, and real-time monitoring—ideal for both lab and field environments.

Features:

  • Frequency regulation: Coarse and fine adjustments; automatically finds resonance points and maintains stability throughout the test
  • Parameter settings: Initial/final frequencies, voltages, step-up intervals, and timing; supports manual/auto modes
  • Large touchscreen LCD: Displays system parameters and offers intuitive operation
  • Automatic voltage stabilization: ±1.5% stability
  • Data storage: Saves ≥50 test records; supports data export and printing
  • Multiple working modes: Manual test, auto-tuning, and auto-test
  • Safety features: Emergency stop, reset button, overvoltage/overcurrent protection, flashover protection, and full voltage output protection
  • Low noise: ≤45 dB during operation
  • Temperature rise: ≤60 K at rated capacity continuous operation

Parameter:

Category Specification
Power Input - Three-phase five-wire 380V
- Single-phase three-wire 220V (±10%, 50 Hz)
Variable Frequency Control Power Supply - Capacity: 30 kVA
- Input voltage: 380V/220V ±10%
- Output voltage: 0–340V adjustable
Excitation Transformer - Capacity: 30 kVA
- Oil-immersed structure
- Input voltage: 400V
- Output voltage: 1.5kV/3kV
High-Voltage Reactor - Specification: 30kV/3.5A
- Dry-type epoxy casting
- Rated inductance: 50H
Capacitive Divider - Rated voltage: 30kV
- Capacitance: 10,000 pF
- Measurement accuracy: ≤1.0%
Frequency Regulation Range 25–320 Hz, resolution: 0.01 Hz
Voltage Stability ±1.5%
Voltage Measurement Accuracy 0.2 class
Continuous Operation Time ≥60 minutes at rated current
Noise Level ≤45 dB
Temperature Rise ≤60 K at rated capacity continuous operation
Protection Functions - Overvoltage protection
- Overcurrent protection
- Flashover protection
- Full voltage output protection