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KDGK-500Z AC/DC Circuit Breaker Selective Coordination Tester
KDGK-500Z AC/DC Circuit Breaker Selective Coordination Tester

KDGK-500Z AC/DC Circuit Breaker Selective Coordination Tester

Applications:

  • Verification of selective coordination in AC 220V/380V and DC 110V/220V power distribution systems
  • Testing trip timing, arc duration, and breaking performance under simulated metallic short-circuit conditions
  • Validation of residual current devices (RCDs) via leakage trip simulation
  • Use in substations, power plants, data centers, rail systems, and industrial facilities for preventive maintenance and commissioning
  • Compliance assessment per industry best practices for breaker grading and protection selectivity

  • Response within
    24 hours

  • Free warranty
    12 month

  • On-line training
    Support

Profile:

Developed by Kaidi Zhengda, this tester integrates a 32-bit high-speed microcontroller (168 MHz) with 1 MSPS high-resolution ADCs to capture transient fault waveforms with precision. Featuring automatic AC/DC system recognition, built-in database management, and triple-layer safety protection, it delivers lab-grade accuracy in a rugged, field-deployable package—significantly improving testing efficiency and data traceability.

Features:

  • Dual-system support: Automatically identifies and tests AC (220V/380V) and DC (110V/220V) circuits
  • Realistic fault simulation: Performs metallic short-circuit tests (phase-phase, phase-neutral, DC) to validate coordination
  • Comprehensive timing analysis: Measures and displays breaking time, arcing time, extinction time, and full current waveform
  • Leakage trip test: Simulates RCD tripping at user-defined residual currents
  • Smart pre-estimation: Calculates expected short-circuit current and loop resistance before test execution
  • Triple safety protection:
    • SCR-based current control
    • Time-delay relay cutoff (≤1000 ms)
    • Manual emergency stop button
  • Zero-crossing triggering (for AC): Prevents contact damage during switching
  • Graphical touchscreen interface with intuitive operation and real-time waveform display
  • Built-in database: Stores ≥3000 test records; exports to Excel or Word for reporting and archiving
  • Capacity memory function: Saves frequently used breaker parameters for one-click “Quick Test”
  • High-resolution recording: 24-bit sampling captures half-cycle before and after fault initiation

Parameter:

Parameter Specification
Operating Power AC 220V ±15%, 50 Hz, ≤72 W
Test System Voltages AC 220V / AC 380V / DC 110V / DC 220V
Voltage Measurement Accuracy ±0.2% F.S.
Current Measurement Accuracy ±0.5% F.S.
Short-Circuit Current Estimation Accuracy <5% F.S.
Estimated Current Range 0 – 8000 A
Actual Short-Circuit Test Range ≤5000 A
Max Delay Protection Time ≤1000 ms
Delay Adjustment Range 5% – 100% of set time
Waveform Recording Half-cycle pre-fault + half-cycle post-fault
Recording Resolution 24-bit
Data Storage Capacity ≥120 MB (stores ≥3000 test records)
Short-Circuit Test Modes Phase-Phase, Phase-Neutral, DC
Dimensions (W×H×D) 492 mm × 210 mm × 490 mm
Weight 20 kg