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KDWJF-30kW Single-Phase Standard Sine Wave Partial Discharge-Free Variable Frequency Test Power Supp
KDWJF-30kW Single-Phase Standard Sine Wave Partial Discharge-Free Variable Frequency Test Power Supp

KDWJF-30kW Single-Phase Standard Sine Wave Partial Discharge-Free Variable Frequency Test Power Supp

Applications:

  • Partial discharge (PD)-free testing of transformers, cables, switchgear, and insulating materials
  • Dielectric withstand and insulation tests requiring clean sinusoidal excitation
  • Frequency-variable aging and resonance tests (e.g., for GIS, CT/VT, motors)
  • Calibration and validation of PD measurement systems
  • R&D and quality assurance in high-voltage equipment manufacturing

  • Response within
    24 hours

  • Free warranty
    12 month

  • On-line training
    Support

Profile:

Engineered for high electromagnetic compatibility and safety, the KDWJF-30kW integrates advanced magnetic shielding, forced-air cooling, and robust protection logic. It complies with stringent insulation and stability requirements, making it ideal for sensitive partial discharge measurements where signal integrity is critical. The unit supports parallel operation for future capacity expansion and includes dedicated auxiliary power outputs for test instruments.

Features:

  • Ultra-low partial discharge: <5 pC
  • Pure sine wave output with THD <1%
  • Full magnetic and electric field shielding—no spatial radiation
  • Comprehensive protection: short-circuit, overcurrent, overtemperature, and emergency stop
  • Intuitive manual controls: coarse/fine voltage & frequency adjustment buttons
  • Built-in timer (0–99 min, 0.1s resolution) with audible alert
  • Automatic fan phase-sequence detection and rotation correction
  • Dedicated isolated 220V/50Hz/500W auxiliary power outlet for test instruments
  • Synchronized 100V/100W reference output for PD analyzer frequency sync
  • Low-temperature heating system for operation down to –20°C
  • Parallel-ready design with pre-installed expansion interface
  • Dual switching protection: air circuit breaker + AC contactor in main circuit
  • Reliable terminal connections with high safety insulation (≥3kV/1min)

Parameter:

Parameter Specification
Max Output Power 30 kW (active)
Input Power 3-phase AC 380V ±10%, 50 Hz
Output Voltage (Single-Phase) 0 – 350 V, continuously adjustable
Output Current (Rated) 85.7 A
Output Waveform Standard sine wave
Waveform Distortion (THD) <1%
Voltage Stability <1% (with input variation <2% over 5 min)
Frequency Range 30 – 300 Hz
Frequency Resolution ≤0.1 Hz
Frequency Stability ≤0.05%
Partial Discharge Level <5 pC
Duty Cycle 180 minutes at rated power
Temperature Rise ≤25 K after 90 min at full load
Noise Level ≤85 dB
Insulation Strength ≥3 kV AC / 1 min (input/output to ground or enclosure)
Cooling Method Forced air cooling
Auxiliary Power Outputs - Instrument supply: 220V AC, 50Hz, 500W (isolated)
- Sync supply: 100V AC, 100W (for PD analyzer)
Operating Temperature Down to –20°C (with built-in heater)
Parallel Operation Supported (identical models)