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Products Infomation

Achieve partial discharge testing within coils using a microwave sensor + impulse winding tester!
We sensitively detect the electromagnetic waves from partial discharges occurring inside the coil using a narrow-band microwave sensor from the high-speed rising impulse surge waveform. In addition to layer short testing of coil components, this groundbreaking tester enables easy partial discharge testing within coils.
Impulse winding partial discharge testing machine
Model:
DWX-05PD
Maker:
ECG-Kokusai
Features
• Direct Electromagnetic Detection: Identifies partial discharges within coils by directly detecting electromagnetic waves.
• High-Frequency Signal Detection: Utilizes a narrow-band patch antenna to detect only the high-frequency signals associated with partial discharges.
• High Sensitivity: Placing the antenna near the test coil allows for highly sensitive partial discharge testing.
• Minimal Circuit Influence: Designed to be unaffected by the test circuit, ensuring reliable results.
• Ease of Use: Simple to handle and easy to integrate into production lines.
• Automation Ready: Capable of automating the partial discharge testing process for enhanced efficiency.
• Retrofit Capability: Can be retrofitted to existing DWX series impulse winding testers with the optional microwave sensor module.
Application
With regards to motor | Inverter motor・Hybrid car power motor・Various car motors, etc. |
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With regards to Transformer | For LCD TV backlight power supply・Switching power supply transformer for consumer electronic etc. |
Various coils | IH Coil for cooking heater・Choke coil for inverter power supply high note wave filter etc. |
Specification
Impulse Test Section | |
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Test Inductance Range | 10μH or more (recommended) |
Sampling Speed | 8 bit / 10 nano-sec. (100MHz) |
Sampling Memory | 512-byte |
Applied Voltage | 500V to 5000V (100V step) |
Test Input Circuit (Impedance) |
Resistive divider (5MΩ) |
Partial Discharge Test Section | |
Microwave Antenna | Sensing electromagnetic waves of partial discharge with a narrow-band patch antenna |
Detection Range | Recommended within 30 cm from the test object during installation |
Antenna Dimensions / Cable Length | W = 80mm, H = 80mm, D = 10mm, Antenna cable length = 2m |
Common Section | |
Screen Display Waveform Display Range |
640×480 dot, 8.4-inch TFT color LCD 512×256 dot |
Judgment Method | Comparison with master waveform Comparison judgment by waveform area, waveform difference area, discharge amount, etc. Automatic test of partial discharge inception voltage (PDIV) and extinction voltage (PDEV) Judgment of presence or absence of partial discharge, discharge level, and occurrence probability |
Master Waveform Memory Method | Main unit: 196 types (14 types/14 pages) Compact Flash Memory: 700 types |
External Interface | Parallel I/O (Start, Reset, OK, NG, Busy, etc.) RS-232C (test control, test data input/output) Printer port (screen hard copy) Ethernet (optional) |
External Dimensions | W = 345mm, H = 185mm, D = 360mm, Weight approx. 12kg |
Operating Conditions | 0℃ to 40℃, Power supply voltage: 100V to 240V ±5% |