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- Description
- Specifications
- Applications
- Advantages
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Description
The GDFR-AD is an all-in-one intelligent high voltage test system that integrates AC/DC high voltage power supply, precision voltage measurement, and intelligent control into a single unit, designed for AC/DC withstand voltage test and leakage current measurement of medium-voltage electrical equipment in substations, power plants, and industrial sites. It fully complies with DL/T 848.1-2004 and GB/T 16927.1-2011, adopting high-frequency PWM technology and double closed-loop voltage/current feedback to deliver stable output, low ripple, and high measurement accuracy.
The system consists of a main control unit, AC high voltage source, dual DC high voltage sources (positive/negative polarity), built-in standard AC potential transformer (PT), and built-in standard DC resistance divider, eliminating the need for external measuring instruments. Equipped with a 7-inch full-color touch LCD, it supports one-key automatic test, real-time voltage/current waveform display, and test data storage/export. With comprehensive over-voltage, over-current, breakdown, zero-start, and ground detection protection, it ensures safe operation for both the operator and the test sample. Ideal for commissioning, periodic maintenance, and fault diagnosis of 10kV–35kV power cables, transformers, switchgear, and zinc oxide arresters (MOA).
Specifications
|
Parameter |
Specification |
|
Input Power |
3-phase 380V±10%, 50Hz |
|
AC Output Voltage |
0–50kV RMS (customizable: 20kV/35kV/100kV) |
|
AC Output Current |
0–100mA (customizable: 50mA/200mA/500mA) |
|
DC Output Voltage |
0–60kV (positive/negative polarity, independent adjustment) |
|
DC Output Current |
0–50mA (customizable: 20mA/100mA) |
|
Voltage Measurement Accuracy |
AC ±0.5% / DC ±0.5% |
|
Current Measurement Accuracy |
±1.0% |
|
Ripple Coefficient |
AC ≤3% / DC ≤1% |
|
Built-in Standard Measurement |
0.2 级 AC PT / 0.1 级 DC resistance divider |
|
Display |
7-inch 65K color touch LCD |
|
Test Modes |
Manual, Automatic, Step, MOA |
|
Timing Function |
0–9999s adjustable；audible alarm |
|
Data Storage |
1000 groups；time-stamped；USB export |
|
Protection |
Zero-start, Over-voltage, Over-current, Breakdown, Ground detection, Emergency stop |
|
Cooling System |
Forced air cooling |
|
Operating Temperature |
-10℃ ~ +40℃；Humidity ≤85%RH (non-condensing) |
|
Dimensions (mm) |
600×500×1200 (main unit) |
|
Weight |
~85kg (with casters) |
|
Compliance |
DL/T 848.1-2004, DL/T 846.1-2016, GB/T 16927.1-2011, IEC 61010-1 CAT III 1000V |
Applications
Core Test Objects
- Power cables: 10kV–35kV XLPE/PVC insulated cables (AC/DC withstand & leakage test)
- Distribution transformers: 10kV–35kV winding AC/DC withstand voltage test
- Switchgear & GIS: 10kV–35kV vacuum breakers, load switches, busbars
- Zinc oxide arresters (MOA): DC reference voltage and leakage current test
- Insulators & bushings: power frequency flashover voltage test
- Capacitors & motors: medium-voltage insulation test
Typical Usage Scenarios
- Substation commissioning: new equipment acceptance tests
- Preventive maintenance: periodic AC/DC hipot tests
- Fault diagnosis: insulation degradation, moisture ingress, or damage detection
- Manufacturing quality control: production line testing of electrical equipment
- On-site field testing: portable design for remote substation use
Advantages
All-In-One Integrated System
Eliminates need for separate power supply, divider, and controller → reduces equipment investment, simplifies wiring, saves setup time
Built-in High-Precision Standard Measurement
0.2 class AC PT + 0.1 class DC divider → traceable measurements, no external calibration required
One-Key Automatic Test
Auto boost, hold, step down, and shutdown → reduces human error, improves testing efficiency
Comprehensive Safety Protection
Multiple protection layers + emergency stop → maximum safety for operator and equipment
Robust Industrial Design
Heavy-duty chassis + forced air cooling → reliable performance in harsh field environments
