EN
GDRB-C Transformer Winding Deformation Tester
GDRB-C Digital Intelligent Industrial Transformer Winding Deformation Tester (Frequency Response Analysis) with 10Hz-10MHz Sweep Range, 0.01% Frequency Accuracy, 40000 Sweep Points, 99.9% Repeatability, Dual-Channel Synchronous Sampling, Built-in Industrial PC, Automatic Deformation Diagnosis, for 6kV-500kV Power Transformer High-Precision Non-Destructive Winding Deformation Detection.
- Description
- Specification
- Applications
- Advantages
- FAQ
- Recommended Products
Description
The GDRB-C is a high-performance, industrial-grade non-destructive transformer test instrumentexclusively designed for high-precision winding deformation detection of 6kV-500kV power transformers. It fully complies with DL/T 911-2016, IEC 60076-18:2012 and IEEE Std C57.149-2012 standards, adopting imported DDS digital sweep frequency technology and dual-channel 16-bit synchronous sampling to achieve ultra-wide frequency coverage and ultra-high test repeatability.
The instrument features an all-in-one industrial PC design with a built-in 8.4-inch high-brightness touch screen and Windows operating system, eliminating the need for external laptops. It supports both linear and segmented sweep modes, with up to 40000 sweep points to capture subtle changes in winding frequency response curves. By comparing the current curve with the baseline curve, it can accurately detect axial displacement, radial bulging, turn-to-turn short circuits, core loosening and other mechanical faults as small as 1mm. Equipped with intelligent analysis software, it automatically calculates correlation coefficients and provides four-level deformation diagnosis results. Ideal for post-short-circuit fault detection, post-transportation acceptance, preventive maintenance tests, factory type tests and third-party certification of large power transformers.
Specification
| Parameter | Specification |
|---|---|
| Sweep Frequency Range | 10Hz – 10MHz |
| Frequency Accuracy | 0.01% |
| Amplitude Measurement Range | -120dB – +20dB |
| Amplitude Accuracy | ±0.1dB |
| Sweep Points | 40000 points (linear sweep) / 2000 points (segmented sweep) |
| Sweep Modes | Linear sweep / Segmented sweep |
| Test Repeatability | ≥99.9% |
| Sampling Channels | Dual-channel 16-bit synchronous sampling |
| Output Voltage | ±10V peak (software adjustable) |
| Output Impedance | 50Ω |
| Input Impedance | 1MΩ (built-in 50Ω matching resistor) |
| Voltage Isolation | 5000V |
| Diagnosis Method | Correlation coefficient method (DL/T 911-2016) |
| Deformation Grades | Normal / Attention / Abnormal / Severe |
| Comparison Modes | Longitudinal comparison / Transverse comparison |
| Display | 8.4-inch high-brightness industrial touch screen |
| Operating System | Built-in Windows operating system |
| Data Storage | 1000 groups (with time stamp, power-off protection) |
| Data Export | USB interface, Word/PDF report generation |
| Language Support | Chinese/English bilingual |
| Power Supply | AC 220V±10%, 50Hz |
| Protection Functions | 5000V voltage isolation, Over-voltage, Over-current, Short-circuit, Reverse polarity, Automatic discharge |
| Dimensions (mm) | 355×145×270 (L×W×H) |
| Weight | ~17kg |
| Operating Temperature | -10℃ ~ +50℃ |
| Operating Humidity | ≤90%RH (non-condensing) |
| Altitude | ≤2000m |
| Compliance | DL/T 911-2016, IEC 60076-18:2012, IEEE Std C57.149-2012, GB/T 1094.1-2021 |
Applications
Core Test Objects
- Large power transformers: 6kV-500kV oil-immersed power transformers (up to 1000MVA)
- Ultra-high voltage transformers: 220kV-500kV EHV/UHV power transformers
- Dry-type transformers: 10kV-35kV dry-type power transformers
- Special transformers: rectifier transformers, furnace transformers, traction transformers
- Generator transformers: large generator step-up transformers
Typical Usage Scenarios
- Post-short-circuit fault detection: mandatory test after transformer suffers near-area short-circuit fault
- Post-transportation acceptance: check for winding deformation caused by long-distance transportation
- Preventive maintenance tests: regular inspection of transformer winding condition
- Factory type tests: transformer manufacturer type tests and outgoing quality control
- Third-party testing institutions: compliance testing and certification
- Power companies: on-site transformer condition assessment and life management
- Research institutes: transformer fault mechanism research and standard formulation
Advantages
Compliance with International Standards
Fully meets DL/T 911-2016, IEC 60076-18 and IEEE Std C57.149 standards → test results are globally recognized
10MHz Ultra-Wide Frequency Range
Covers all characteristic frequency bands of 6kV-500kV transformers → detects minor faults that cannot be found by 2MHz instruments
99.9% Industry-Leading Repeatability
Ensures consistent test results across different times and operators → eliminates test errors caused by instrument instability
40000 High-Resolution Sweep Points
Captures subtle changes in winding frequency response curves → identifies potential faults before they cause serious damage
All-in-One Industrial PC Design
Built-in industrial PC and touch screen, no external laptop required → simplifies operation, improves on-site test efficiency
Fast Test Speed
30 seconds per winding, complete three-phase test in less than 5 minutes → improves work efficiency by 50% compared to traditional instruments
Intelligent Automatic Diagnosis
Built-in standard algorithm, automatically calculates correlation coefficient and gives four-level diagnosis → reduces operator skill requirements, eliminates subjective judgment errors
Rugged Industrial Design
Rugged aluminum alloy chassis, shock and vibration resistant → suitable for harsh field environments
FAQ
Q: What is the difference between GDRB-C and GDRB-B?
A:
- GDRB-C (Industrial Grade): 10Hz-10MHz sweep range, 40000 sweep points, 99.9% repeatability, built-in industrial PC, no external laptop required, optimized for high-precision laboratory tests and 220kV-500kV EHV transformer on-site tests
- GDRB-B (Portable Grade): 10Hz-2MHz sweep range, 2000 sweep points, 99.5% repeatability, requires external laptop, built-in 8-hour battery, optimized for 10kV-110kV distribution transformer on-site tests Both use the frequency response analysis method and meet DL/T 911-2016 standards.
Q: Why is 10MHz sweep range important?
A: Minor winding deformations (such as 1mm axial displacement or partial turn-to-turn short circuits) mainly cause changes in the high-frequency band (above 2MHz). The 10MHz ultra-wide frequency range of GDRB-C can capture these subtle changes, enabling early detection of potential faults that cannot be found by 2MHz instruments.
Q: Does GDRB-C require an external laptop?
A: No. It has a built-in industrial PC with 8.4-inch touch screen and Windows operating system, which can complete all test operations, data analysis and report generation independently, eliminating the need for external laptops and simplifying on-site operation.
Q: What is the test repeatability and why is it important?
A: GDRB-C has an industry-leading 99.9% test repeatability, which means that the test results of the same winding at different times and by different operators are almost identical. This is crucial for long-term winding condition monitoring, as it ensures that any curve changes are caused by actual winding deformation rather than instrument errors.
