Product Introduction
The Digital Voltage Divider is a precision instrument designed for high-voltage measurement. It converts high voltages into proportional low-voltage signals through a high-precision resistive divider network and utilizes digital signal processing technology to ensure accurate measurement and display. Suitable for both AC and DC high-voltage testing, it is widely used in power systems, high-voltage laboratories, equipment testing, metrology calibration, and scientific research, providing a safe and reliable solution for high-voltage measurement.
Product Characteristics
1. High Precision
Utilizes precision high-voltage thin-film capacitors and glass-glaze resistors for high input impedance and low test current, reducing power consumption while enhancing instrument accuracy and stability. The design incorporates TBPU and high-performance operational amplifiers for signal amplification, along with double-integral AD sampling technology. A 4½-digit LCD display achieves a maximum resolution of 0.001kV, positioning it as a next-generation high-voltage electrostatic voltmeter.
2. Excellent Anti-Interference Performance
Features specialized shielding technology with a uniformly pressed aluminum alloy spherical surface for improved electric field distribution and prevention of tip discharge. This design enhances measurement data stability. The low-voltage indicator is enclosed in a fully shielded metal structure, and a high-quality coaxial cable connects the high-voltage divider to the display, minimizing high-voltage interference and ensuring high stability and linearity.
3. Safe and Reliable
The AC/DC voltage divider consists of a high-voltage divider and a low-voltage display unit. The high-voltage divider is filled and potted with DuPont® material using a specialized process, resulting in a compact and lightweight structure with minimal internal discharge. Its oil-free design eliminates leakage risks. The coaxial connection between the high-voltage divider and low-voltage instrument ensures operational safety by maintaining separation between high and low-voltage sections.
4. User-Friendly Operation
Equipped with toggle switches for easy selection of high/low voltage and AC/DC modes, providing efficient and intuitive control. Measurement results are displayed directly on a clear 4½-digit LCD screen, offering simplicity and convenience for on-site inspections.
5. Portable Design
Constructed with a lightweight aluminum alloy case in a modular, detachable structure. Its compact size and low weight ensure excellent portability and ease of use in various field applications.
Product Parameter
technical parameters（Special parameters can be customized）
| divider ratio | 1000:1 |
| insulating medium | Dupont dry dielectric material |
| Ac measurement mode | Ture RMS |
| environmental conditions | temperature：0～40℃.humidness：≤85%RH |
specification parameter
| Version | voltage classes | 정확성 | 범위 | impedance（MΩ） | 신호선 길이 | boundary dimension（mm3） | quality（kg） |
| SGB-50C | AC：50kV,DC：50kV | AC：1.0% DC：0.5% | Low：0-20kV,High：0-50kV | 600 | 5m | 180*180*620 | 6 |
| SGB-100C | AC：100kV,DC：100kV | AC：1.0% DC：0.5% | Low：0-20kV,High：0-100kV | 1200 | 5m | 180*180*900 | 8 |
| SGB-150C | AC：150kV,DC：150kV | AC：1.0% DC：0.5% | Low：0-20kV,High：0-150kV | 1800 | 8m | 250*250*1100 | 15 |
| SGB-200C | AC：200kV,DC：200kV | AC：1.0% DC：0.5% | Low：0-20kV,High：0-200kV | 2400 | 8m | 250*250*1330 | 17 |
| SGB-300C | AC：300kV,DC：300kV | AC：1.5% DC：1.0% | Low：0-20kV,High：0-300kV | 3600 | 10m | 250*250*1900 | 22 |
Application Scenarios
Power transmission and substation equipment acceptance testing: High-voltage measurement on newly installed transformers, switchgear, and busbar systems to verify installation quality and operational performance.
Periodic maintenance of high-voltage equipment: During equipment overhauls and preventive maintenance, measure operating voltage to promptly identify potential insulation defects and abnormalities.
New energy system commissioning: Used for voltage measurement in photovoltaic, energy storage, and HVDC systems to ensure equipment meets design requirements before commissioning.Laboratory and metrology calibration: Provides high-precision voltage measurement for high-voltage testing, instrument calibration, and scientific research, ensuring data accuracy and traceability.
Industrial on-site high-voltage testing: Suitable for on-site commissioning, operational monitoring, and fault diagnosis of large electrical equipment, providing a reliable basis for safe and stable equipment operation.
FAQ about Digital Voltage Divider
How does this high-voltage AC/DC voltage divider achieve high-precision measurement, and what are its core technology and resolution specifications?
The voltage divider uses high-precision high-voltage film capacitors and high-voltage glass-glaze resistors as its core divider components, combined with a high-input-impedance design. This significantly reduces the test current drawn from the measured circuit and lowers self-power consumption, thereby minimizing measurement errors and temperature drift from the source. In the signal processing stage, it integrates high-performance operational amplifiers for signal conditioning and employs dual-slope AD sampling technology. Paired with a 4½-digit LCD display, it achieves a maximum resolution of 0.001 kV, positioning it as a new-generation high-voltage electrostatic voltmeter with metrological-grade potential. It is especially suitable for laboratory calibration and on-site precision measurement applications where voltage accuracy is critically required.
Why can the product maintain long-term stable measurement performance?
The product features a high-input-impedance design, which effectively reduces test current and power consumption, minimizing the impact of component heating on measurement results. In addition, high-stability voltage divider components are carefully selected to ensure good measurement consistency even after long-term use.
In high-voltage environments, is the measurement data susceptible to interference?
A: No. This product features a multi-layer shielding design that effectively reduces external electromagnetic interference, ensuring stable and reliable measurement results even in high-voltage environments.
Change battery
Open the LV display meter, if you find vague LCD display or no response, indicating that the instrument internal battery voltage is low, it needs tobereplaced. Specific steps are as follows:
1. Press "power switch" to turn off power supply of LV display meter.
2. Unscrewing four screws on the LV display panel, and remove thepanel.
3. Unscrewing the screw on the battery box and open the battery cover, then replace the 9V battery. (Note the positive and negative polarity of battery)
Notes
1. When using this device, please make sure on sundries drawroundit, so as not to affect measurement accuracy.
2. Please keep a safe operation distance to ensure operational safety.
3. Check whether all parts are firmly connected, especially ground connection must be solid.
4. After completing the measurement, until the meter returns to zero, it is allowable to enter the site.
5. Completed DC high voltage measurement, the instrument must discharge.
6. Overvoltage use is strictly forbidden. Please keep the surface clean.
7. Handle with care, do not crash and extrude.
8. Do not use the equipment; it should be cased and placed in a cool dry place.
9. Calibration: At least once a year at a superior metrology calibration department, or return to factory calibration.
