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GDC-200kv
CHONGQING GOLD
200kv RC AC/DC High Voltage Divider HVDC Testing Equipment with Dry Insulating Medium
1. Integrated RC-DC Measurement: Avoiding the Inherent Defects of Single-Type Voltage Dividers |
Unlike simple resistor or capacitor voltage divider solutions, the RC combination accommodates both AC power frequency and DC measurement needs. AC measurement accuracy is ±1.5%, and DC measurement accuracy is ±1.0%. One device performs both types of high-voltage measurements, eliminating the need to purchase two sets of equipment. With an input impedance as high as 2000MΩ, it minimizes disturbance to the load of the measured high-voltage source and will not change the actual circuit operating conditions due to the connection of a voltage divider. |
| 2. Full-Link Shielding for Interference Reduction: Solving the Problem of Reading Fluctuations in Substations |
The top aluminum alloy equipotential bonding sphere optimizes the spatial electric field distribution, suppressing corona discharge at the tip; the high-voltage body is sealed and shielded, while the low-voltage digital display uses a fully metal casing for shielding; it is equipped with a 4-meter dedicated shielded coaxial signal cable. In the strong electromagnetic environment of a substation with adjacent energized equipment, the readings will not fluctuate randomly, ensuring stable and reliable on-site test data. Dry sealing technology reduces the risk of internal partial discharge, allowing stable operation even in damp environments. |
| 3.Dual-Range Design for Balanced Resolution Across Large and Small Voltage Ranges |
Features hardware switching between a 0-20kV low range and a 0-200kV high range. The low range is used for low-voltage testing of 20kV and below, further improving the resolution of decimal places. The four-and-a-half-digit LCD display has a resolution of up to 0.001kV, clearly capturing minute voltage changes and avoiding the common problem of coarse readings in the low-voltage range with a single large range. |
| 4. Flexible Dual-Mode Use to Adapt to Diverse Data Acquisition Needs |
The standard low-voltage digital display head allows for direct reading of high-voltage values upon power-on. Simultaneously, the voltage divider column supports independent output of a 1000:1 voltage divider sampling signal, independent of the included display meter. It can be directly con |
| 5. Factory-based Multi-point Calibration to Meet Project Traceability Requirements |
The device undergoes full-range multi-point calibration using a direct comparison method, covering multiple key voltage points from 5kV to 198kV. Each device comes with a factory calibration report. For EPC projects and third-party testing organizations, this allows for the provision of instrument traceability documentation, preventing reports from being rejected due to missing calibration records. It also facilitates periodic re-inspections by metrology institutions. |
measuring principle
Precise High Voltage Amplitude Measurement
Measures the true RMS value of AC high voltage at power frequency, acquiring the actual applied voltage for AC withstand voltage tests.
Measures DC high voltage for DC high voltage generator calibration and surge arrester DC reference voltage tests.
Switches between high and low ranges: 0-20kV low range, 0-200kV high range, optimizing the full-range measurement resolution.
High Voltage Equipment Comparison and Calibration
Calibrates the indication error of withstand voltage testers and DC high voltage generator meters, serving as a voltage reference standard in the field.
Voltage Observation Reference for Various High Voltage Tests in High Voltage Testing Laboratories
Extended Signal Acquisition and Output
Independent output of a 1000:1 low-voltage sampling signal from the voltage divider column, allowing connection to external multimeters and data acquisition equipment to record the entire voltage change process.
| Item | Specifications |
|---|---|
| Model | GDC‑200KV |
| Rated Working Voltage | AC 200kV / DC 200kV |
| Divider Impedance | 2000 MΩ |
| Divider Ratio | 1000:1 |
| Measurement Accuracy | AC: ±1.5% ；DC: ±1.0% |
| Display Range | Low‑range:0‑20kV；High‑range:0‑200kV4‑1/2 digit LCD, Resolution:0.001kV；AC True RMS measurement |
| Insulation Material | U.S. Dupont dry‑type dielectric encapsulation |
| Signal Cable | 4‑meter shielded coaxial cable |
| Compliance Standard | JJG 496‑2016，JJG 1007‑2005 |
| Calibration Mode | Factory multi‑point direct‑comparison calibration, with factory calibration report |
| Indicator Power Supply | 9V battery powered，no mains power required on site |
| Operating Environment | 0℃ ~ 40℃；Humidity ≤85%RH (non‑condensing) |
High-voltage equipment manufacturing plants: Type testing of surge arresters and instrument transformers; voltage monitoring of withstand voltage testing stations; factory calibration and verification of DC high-voltage generators.
Power plant and substation operation and maintenance: On-site acquisition of real high-voltage data for commissioning tests and preventive withstand voltage tests, replacing electrostatic voltmeters to obtain reliable test data.
Third-party testing and metrology institutions: On-site high-voltage comparison testing, providing instrument traceability information when issuing test reports.
Domestic and international EPC transmission and transformation projects: On-site withstand voltage testing of newly built substations, meeting the audit requirements for measuring instrument calibration data in overseas projects.
Universities and research high-voltage laboratories: Acquisition and observation of AC and DC high-voltage scientific experimental voltages.
A:Yes, GDC‑200kV supports rated 200kV power‑frequency AC and 200kV DC measurement, with true‑RMS AC reading. Toggle switch allows fast mode switching.
A:Yes. The divider tower can work standalone with common multimeter. Divider ratio becomes 1000:1; multiply multimeter reading value by 1000 to get actual high‑voltage value
