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- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
The GDFR-20 is a high-precision, portable resistor-capacitor (RC) divider designed for accurate AC/DC high voltage measurement in power systems, industrial testing, and research laboratories. It adopts advanced RC parallel voltage division principle and high-stability metal film resistors + low-loss polypropylene capacitors, delivering excellent linearity, low dielectric loss, and long-term stability.
Unlike traditional oil-filled dividers, the GDFR-20 uses dry polyurethane foam filling, eliminating oil leakage, environmental pollution, and maintenance requirements. It features a fully sealed epoxy glass fiber cylinder with equal potential shielding structure, providing superior anti-interference performance and insulation strength. With a standard BNC interface, it can be directly connected to oscilloscopes, digital multimeters, and high-voltage test equipment for real-time voltage measurement and waveform analysis. Ideal for calibrating DC high voltage generators, AC withstand test sets, and verifying the output accuracy of various high-voltage power supplies.
Specifications
|
Parameter |
Specification |
|
Rated Voltage |
20kV AC (RMS) / 20kV DC (peak) |
|
Measurement Accuracy |
AC: ±0.5% of reading；DC: ±0.5% of reading |
|
Linearity Error |
≤±0.2% |
|
Long-Term Stability |
≤±0.2%/year |
|
Temperature Coefficient |
≤±50ppm/°C |
|
Frequency Range |
40Hz–10kHz |
|
Frequency Response Error |
≤±0.5% (40Hz–1kHz)；≤±1.0% (1kHz–10kHz) |
|
Dielectric Loss (tanδ) |
≤0.001 at 50Hz |
|
Voltage Division Ratio |
1000:1 (standard)；10000:1 (customizable) |
|
Insulation Resistance |
≥1000MΩ (at 25°C) |
|
Withstand Voltage |
1.1× rated voltage for 1 minute |
|
Partial Discharge |
≤10pC at rated voltage |
|
Interface |
Standard BNC |
|
Measurement Cable Length |
4m (shielded) |
|
Filling Medium |
Dry polyurethane foam |
|
Insulation Cylinder Material |
Epoxy glass fiber reinforced plastic |
|
Dimensions (mm) |
Φ220×610 |
|
Weight |
~6.5kg |
|
Operating Temperature |
0°C ~ +45°C |
|
Relative Humidity |
≤85%RH (non-condensing) |
|
Altitude |
≤1500m (customizable for higher altitude) |
|
Compliance |
DL/T 846.1-2004, IEC 61010-1 CAT III 1000V, CE |
Applications
Core Measurement Objects
- DC high voltage generators: output voltage calibration
- AC withstand test sets: output voltage verification
- Power transformers: winding AC/DC voltage measurement
- Zinc oxide arresters (MOA): reference voltage test
- High-voltage capacitors: voltage division and measurement
- Pulse power supplies: pulse voltage waveform analysis
Typical Usage Scenarios
- Power system testing: substation equipment commissioning and preventive maintenance
- Laboratory research: high-voltage physics experiments and calibration
- Manufacturing quality control: high-voltage equipment production line testing
- Field calibration: on-site verification of portable high-voltage testers
- Education and training: university and vocational school high-voltage experiments
Advantages
Dual-Use & High Precision
20kV AC/DC measurement with ±0.5% accuracy → meets the strict requirements of power industry calibration
Wide Frequency Response
40Hz–10kHz bandwidth → suitable for power frequency, square wave, and pulse voltage measurement
Dry & Maintenance-Free
No oil, no leakage, no pollution → safe, environmentally friendly, and low maintenance cost
Portable & Compatible
6.5kg lightweight + BNC interface → easy to carry and connect to various measurement instruments
Long-Term Stability
High-stability components + equal potential shielding → reliable performance and long calibration cycle
FAQ
Q: Is GDFR-20 suitable for both AC and DC high voltage measurement?
A: Yes. It is designed for 20kV AC (RMS) and 20kV DC (peak) measurement with the same ±0.5% accuracy.
Q: What is the standard voltage division ratio? Can it be customized?
A: The standard ratio is 1000:1. Custom ratios such as 10000:1 are available upon request.
Q: Can it be connected to an oscilloscope for waveform analysis?
A: Yes. It has a standard BNC interface and comes with a 4m shielded cable, which can be directly connected to oscilloscopes, digital multimeters, and data loggers.
Q: Is it oil-filled or dry?
A: It uses dry polyurethane foam filling, which is oil-free, leak-proof, pollution-free, and maintenance-free.
Q: What is included in the standard package?
A: GDFR-20 RC divider main unit, 4m shielded BNC measurement cable, BNC to banana plug adapter, dedicated carrying case, user manual, and calibration certificate.
