EN
- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
The GDFR-R-50 is a versatile 0.1 grade DC standard resistance voltage divider designed for on-site calibration and laboratory measurement of DC high voltages in power utilities, substations, and electrical equipment manufacturers. It fully complies with DL/T 846.1-2016 and JJG 1007-2005, adopting imported precision high-voltage non-inductive metal film resistors and balanced multi-layer equipotential shielding structure to minimize leakage current and electromagnetic interference, ensuring stable and accurate measurements in harsh field environments.
The system consists of a lightweight oil-immersed divider unit and a portable digital display meter, with a standard 10000:1 voltage divider ratio (1000:1 optional, custom ratios available). It can be used as a traceable DC high voltage standard to calibrate DC high voltage generators, electrostatic voltmeters, and other HV measuring instruments, or directly measure DC high voltages up to 50kV. With a compact, portable design and 15kg total weight, it is ideal for on-site testing of 10kV–35kV power cables, transformers, switchgear, and zinc oxide arresters (MOA).
Specifications
|
Parameter |
Specification |
|
Rated DC Voltage |
50kV (positive/negative polarity) |
|
Input Resistance |
150MΩ (main divider) |
|
Equipotential Shielding Resistance |
300MΩ (auxiliary divider) |
|
Standard Voltage Divider Ratio |
10000:1 (1000:1 optional) |
|
Measurement Accuracy |
±0.1% of reading (20℃±5℃) |
|
Annual Ratio Stability |
≤0.05% |
|
Temperature Coefficient |
≤25ppm/℃ |
|
Linearity Error |
≤±0.05% |
|
Insulation Medium |
High-grade insulating oil |
|
Display |
4-digit digital LCD |
|
Connection |
4m BNC shielded cable |
|
Power Supply (Display Meter) |
AC220V±10%, 50Hz (battery optional) |
|
Operating Temperature |
-10℃ ~ +40℃；Humidity ≤85%RH (non-condensing) |
|
Altitude |
≤1500m (customizable) |
|
Dimensions (mm) |
Divider unit: 300×300×620；Display meter: 200×150×80 |
|
Weight |
Divider unit: ~15kg；Display meter: ~1kg |
|
Compliance |
DL/T 846.1-2016, JJG 1007-2005, GB/T 16927.2-2013, IEC 61010-1 CAT III 1000V |
Applications
Core Test Objects
- DC high voltage generators: on-site calibration of output voltage accuracy
- Electrostatic voltmeters: calibration and verification
- Zinc oxide arresters (MOA): DC reference voltage measurement
- Power cables: 10kV–35kV DC withstand voltage test voltage measurement
- Transformers & motors: DC insulation test voltage measurement
- High-voltage power supplies: DC output voltage verification
Typical Usage Scenarios
- On-site substation maintenance: periodic calibration of DC test equipment
- Manufacturing quality control: production line testing of high-voltage equipment
- Laboratory calibration: secondary standard for DC high voltage measurement
- Commissioning: new equipment insulation verification before put into operation
- Compliance inspection: meets power industry and national metrology standards
Advantages
0.1% Accuracy & 0.05% Annual Stability
Balances precision and portability；reliable traceable measurements for field use → ensures test data validity
Balanced Equipotential Shielding
Eliminates leakage current and EMI；accurate readings in harsh substation environments → stable performance in strong interference
Oil-Immersed Fully Sealed Structure
Excellent insulation performance；anti-moisture, anti-corona, maintenance-free → long service life
Portable Split Design
15kg divider unit + 1kg display meter → single-person operation and easy transport → improves field testing efficiency
Compliance with National Standards
Fully meets DL/T 846.1 and JJG 1007 → ensures regulatory compliance and test result acceptance
FAQ
Q: What is the accuracy class of GDFR-R-50?
A: It is a 0.1 grade DC standard voltage divider, meeting the requirements of JJG 1007-2005 for 0.1 grade DC high voltage dividers.
Q: Can it be used for on-site calibration of DC high voltage generators?
A: Yes. Portable split design and 15kg weight make it ideal for on-site substation calibration.
Q: What is the annual ratio stability?
A: ≤0.05%, ensuring long-term measurement reliability and traceability.
Q: Is it maintenance-free?
A: Yes. Fully sealed oil-immersed structure；no oil leakage, no need for regular maintenance.
