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- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
The GDFR-540kV/500pF is a professional, low-partial-discharge capacitive voltage divider specifically optimized for variable frequency series resonant test systems, designed for accurate measurement of power frequency and variable frequency AC high voltages in high-voltage laboratories, power equipment manufacturers, and on-site substation tests. It fully complies with DL/T 846.1-2016, GB/T 16927.2-2013, and IEC 60060-1, adopting multistage series-connected high-voltage film capacitors and distributed damping resistors to achieve excellent frequency response characteristics and minimize waveform distortion across the 30–300Hz resonant frequency range.
The system consists of a high-voltage divider unit with a double-layer stainless steel grading ring and a low-voltage interface compatible with all mainstream series resonant controllers, with a standard 1000:1 voltage divider ratio (2000:1/3000:1 optional, custom ratios available). It features ≤5pC ultra-low partial discharge at rated voltage, making it suitable for both AC withstand voltage tests and partial discharge (PD) tests of high-voltage equipment. With a heavy-duty mobile base with locking casters and epoxy glass fiber insulation cylinder, it is ideal for on-site series resonant tests of 110kV–500kV power cables, transformers, GIS, and switchgear.
Specifications
|
Parameter |
Specification |
|
Rated Power Frequency AC Voltage |
540kV (RMS) |
|
Rated Lightning Impulse Voltage |
1200kV (peak) |
|
High-Voltage Arm Capacitance |
500pF ±2% |
|
Low-Voltage Arm Capacitance |
500nF ±0.5% |
|
Standard Voltage Divider Ratio |
1000:1 (2000:1/3000:1 optional) |
|
Operating Frequency Range |
30Hz–300Hz |
|
Frequency Response Error |
≤±0.5% (30–300Hz) |
|
Partial Discharge Level |
≤5pC at 540kV |
|
Dielectric Loss Tangent (tgδ) |
≤0.1% at 50Hz |
|
Voltage Measurement Accuracy |
±1% (RMS)；±1.5% (peak) |
|
Annual Ratio Stability |
≤±0.5% |
|
Temperature Coefficient |
≤50ppm/°C |
|
Linearity Error |
≤±0.5% |
|
Output Interface |
BNC shielded connector |
|
Insulation Material |
High-purity epoxy glass fiber reinforced plastic |
|
Grading Ring |
Double-layer stainless steel |
|
Base Type |
Heavy-duty steel mobile base with 4 locking casters |
|
Dimensions (mm) |
Φ450×2200 (including grading ring) |
|
Weight |
~65kg |
|
Operating Temperature |
-10°C ~ +40°C；Humidity ≤85%RH (non-condensing) |
|
Compliance |
DL/T 846.1-2016, GB/T 16927.2-2013, IEC 60060-1, IEC 61083-2 |
Applications
Core Test Objects
- Variable frequency series resonant test systems: voltage measurement and feedback control
- Power cables: 110kV–500kV XLPE insulated cables (AC withstand & PD tests)
- Power transformers: 110kV–500kV power transformers (AC withstand & PD tests)
- GIS & switchgear: 110kV–500kV gas-insulated switchgear (AC withstand & PD tests)
- Insulators & bushings: high-voltage insulators and bushings (AC withstand test)
- Generators & motors: high-voltage rotating machines (AC withstand test)
Typical Usage Scenarios
- On-site substation testing: series resonant AC withstand tests of power cables and transformers
- Manufacturing quality control: production line testing of high-voltage equipment
- Laboratory calibration: traceable calibration of series resonant test systems
- Research & development: high-voltage insulation research and variable frequency measurement
- Compliance inspection: meets DL/T 846.1 and IEC 60060-1 standards
Advantages
30–300Hz Wide Frequency Response
Optimized for series resonant systems；flat response across all test frequencies → accurate voltage measurement at any resonant point
≤5pC Ultra-Low Partial Discharge
Enables simultaneous AC withstand and PD tests with one divider → eliminates need for separate PD couplers, saves cost
±1% High Accuracy & Long-Term Stability
Reliable voltage feedback for series resonant controllers → ensures test voltage accuracy and equipment safety
Mobile Base with Locking Casters
Easy to move and fix on site；compatible with all mainstream series resonant systems → plug-and-play, no calibration required
Compliance with International Standards
Fully meets DL/T 846.1, GB/T 16927.2, and IEC 60060-1 → ensures regulatory compliance and test result validity
FAQ
Q: Is it specifically designed for series resonant test systems?
A: Yes. It is optimized for 30–300Hz variable frequency operation, with flat frequency response and low distortion, making it ideal for series resonant systems.
Q: Can it be used for partial discharge (PD) tests?
A: Yes. ≤5pC ultra-low partial discharge at rated voltage allows simultaneous AC withstand and PD tests with one divider.
Q: What is the operating frequency range?
A: 30Hz–300Hz, covering all common series resonant test frequencies for cables, transformers, and GIS.
Q: Is it compatible with other manufacturers' series resonant controllers?
A: Yes. It uses a standard BNC interface and 1000:1 ratio, compatible with all mainstream series resonant controllers.
