EN
- Description
- Specifications
- Applications
- Advantages
- FAQ
- Recommended Products
Description
The GDFR-50G is a high-precision, high-stability DC standard resistance voltage divider designed for accurate measurement and calibration of DC high voltages in power utilities, metrology laboratories, and electrical equipment manufacturers. It fully complies with DL/T 846.1-2004 and GB/T 16927.2-2013, adopting imported precision high-voltage non-inductive resistors and equipotential shielding technology to minimize leakage current and electromagnetic interference, ensuring long-term measurement accuracy and stability.
The system consists of a high-voltage divider unit and a low-voltage digital display meter, with a standard 10000:1 voltage divider ratio (1000:1 optional). 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 lightweight, portable design and wide operating temperature range, it is suitable for both laboratory calibration and on-site field testing.
Specifications
|
Parameter |
Specification |
|
Rated DC Voltage |
50kV (negative/positive polarity) |
|
Standard Voltage Divider Ratio |
10000:1 (1000:1 optional, custom ratios available) |
|
Input Impedance |
150MΩ |
|
Equipotential Shielding Resistance |
300MΩ |
|
Measurement Accuracy |
±0.1% of reading (0.01% optional) |
|
Annual Ratio Stability |
≤0.05% |
|
Temperature Coefficient |
≤25ppm/°C |
|
Linearity Error |
≤0.05% |
|
Display |
4-digit digital LCD |
|
Connection |
BNC shielded cable |
|
Power Supply (Display Meter) |
AC220V±10%, 50Hz (battery optional) |
|
Operating Temperature |
-10°C ~ +40°C；Humidity ≤85%RH (non-condensing) |
|
Dimensions (mm) |
Divider unit: 300×300×620；Display meter: 200×150×80 |
|
Weight |
Divider unit: ~15kg；Display meter: ~1kg |
|
Compliance |
DL/T 846.1-2004, GB/T 16927.2-2013, IEC 61010-1 CAT III 1000V |
Applications
Core Test Objects
- DC high voltage generators: calibration of output voltage accuracy
- Electrostatic voltmeters: calibration and verification
- Zinc oxide arresters (MOA): DC reference voltage measurement
- Power cables: DC withstand voltage test voltage measurement
- Transformers & motors: DC insulation test voltage measurement
- Metrology laboratories: DC high voltage standard for traceability
Typical Usage Scenarios
- Laboratory calibration: traceable calibration of HV measuring instruments
- On-site testing: field measurement of DC high voltages in substations
- Manufacturing quality control: production line testing of HV equipment
- Research & development: DC high voltage measurement in R&D labs
- Compliance inspection: meets power industry and national metrology standards
Advantages
0.1% Accuracy + 0.05% Annual Stability
High precision and long-term stability → reliable traceable measurements
Equipotential Shielding Technology
Eliminates leakage current and EMI → accurate readings in harsh environments
Imported Precision Non-Inductive Resistors
Low temperature coefficient and high linearity → minimizes measurement errors
Portable Split Design
Lightweight and easy to transport → suitable for both lab and field use
Compliance with National Standards
Fully meets DL/T 846.1 and GB/T 16927.2 → ensures regulatory compliance
FAQ
Q: Can it be used as a traceable DC high voltage standard?
A: Yes. 0.1% accuracy and 0.05% annual stability make it suitable for traceable calibration.
Q: What is the purpose of equipotential shielding?
A: It eliminates surface and volume leakage current, ensuring accurate measurement of high voltages.
Q: Is it portable for field use?
A: Yes. Split design；divider unit ~15kg, display meter ~1kg；easy to transport.
Q: Can it measure both positive and negative DC voltages?
A: Yes. Supports both negative and positive polarity DC voltages.
Q: What's included in the standard package?
A: High-voltage divider unit, digital display meter, BNC shielded cable, power cord, carry case, user manual, calibration certificate.
