Transformer Winding Deformation Tester|XHBX1501
Product Overview
The XHBX1501 Transformer Winding Deformation Tester employs Frequency Response Analysis (FRA)—the internationally recognized method for non-destructive detection of internal transformer winding faults. Fully compliant with DL/T911-2016, this instrument quantifies changes in winding frequency response characteristics caused by mechanical deformation, displacement, and electrical faults including inter-turn short circuits. By comparing frequency response curves across phases (horizontal analysis) and against historical baselines (vertical analysis), the XHBX1501 precisely identifies the type, location, and severity of winding anomalies in 63kV to 500kV power transformers without requiring oil drainage or core disassembly.
At its core, the XHBX1501 features a 16-bit dual-channel high-speed A/D converter driven by DDS (Direct Digital Synthesis) digital sweep technology sourced from the United States, delivering 40,000-point linear frequency sweeps from 10Hz to 10MHz with 0.1dB amplitude accuracy. A built-in expert diagnostic system automatically classifies winding condition into four consistency grades, generates complete Word-format test reports, and supports simultaneous loading of up to six historical curves for trend analysis. With USB, WiFi, and Bluetooth connectivity, the instrument pairs seamlessly with Windows laptops, Android tablets, and smartphones for maximum field flexibility.

Key Features
- DL/T911-2016 Compliant FRA: Frequency Response Analysis methodology fully compliant with Chinese power industry standards for authoritative winding deformation assessment
- 10Hz-10MHz Ultra-Wide Sweep: 40,000-point linear scan with 0.25/0.5/1kHz resolution plus 2,000-point segmented mode for comprehensive frequency response capture
- DDS Digital Sweep Technology: US-origin Direct Digital Synthesis provides exceptionally stable, repeatable excitation signals across the entire frequency range
- 16-Bit Dual-Channel A/D: High-resolution simultaneous sampling clearly captures waveform curve variations when changing tap positions during field testing
- Triple-Mode Connectivity: USB, WiFi, and Bluetooth interfaces support Windows laptops, Android tablets, and smartphones for flexible field deployment
- Expert Auto-Diagnosis System: Four-grade consistency classification (Excellent/Good/Fair/Poor) for both horizontal (A/B/C) and vertical (historical comparison) analysis
- Automatic Word Report Generation: Complete test documentation with color waveform printing, automatic environmental condition recording, and multi-curve overlay
- Dual Measurement Modes: Linear sweep and segmented sweep systems compatible with both major Chinese technical approaches for maximum versatility
- Rapid Testing: Less than 60 seconds per phase—complete three-winding transformer assessment in under 10 minutes
- Non-Invasive Measurement: Testing requires only removal of connecting busbars—no oil drainage, core disassembly, or transformer de-tanking needed
Technical Specifications
| Sweep & Frequency |
| Frequency Range |
10Hz ~ 10MHz |
| Linear Sweep Points |
40,000 Points |
| Frequency Resolution |
0.25kHz, 0.5kHz, 1kHz (Selectable) |
| Segmented Sweep |
0.5kHz ~ 1MHz, 2,000 Points |
| Frequency Accuracy |
0.005% |
| Measurement Accuracy |
| Amplitude Range |
-120dB ~ +20dB |
| Amplitude Accuracy |
0.1dB |
| Repeatability |
99.9% |
| Input Impedance |
1MΩ |
| Output Impedance |
50Ω |
| Output Amplitude |
±20V (Software Adjustable) |
| Hardware & Connectivity |
| Sweep Technology |
DDS Digital High-Speed (USA Origin) |
| A/D Converter |
16-bit Dual Channel High-Speed |
| Connectivity |
USB, WiFi, Bluetooth |
| Software Platform |
Windows/7/8/10 + Android App |
| Diagnostics |
| Detection Types |
Twisting, Bulging, Displacement, Tilting, Inter-turn Short Circuit, Phase Contact Short Circuit |
| Analysis Modes |
Horizontal (A/B/C) + Vertical (Before/After) + Expert Auto |
| Multi-Curve Loading |
Up to 6 Historical Curves Simultaneous |
| Report Format |
Automatic Word Document with Color Printing |
| Measurement Speed |
<60s per Phase, <10min per Transformer |
| Operating Specifications |
| Power Supply |
AC 220V±10%, 50Hz |
| Operating Temperature |
-10℃ ~ 40℃ |
| Storage Temperature |
-20℃ ~ 70℃ |
| Relative Humidity |
<90% (Non-condensing) |
| Applicable Transformers |
63kV ~ 500kV Power Transformers |
| Physical Specifications |
| Dimensions |
370 × 300 × 170mm |
| Weight |
13kg |
Frequently Asked Questions
Q1: How does Frequency Response Analysis (FRA) detect winding deformation without opening the transformer?
FRA is based on the principle that every transformer winding has a unique frequency response "fingerprint" determined by its distributed inductance, capacitance, and resistance parameters. When mechanical deformation occurs—from transportation damage, through-fault currents, or aging—these distributed parameters change, shifting the resonant frequencies and altering response amplitudes. The XHBX1501 sweeps from 10Hz to 10MHz, injecting a low-voltage signal and measuring the response across the winding. By comparing the resulting curve against baseline data (vertical analysis) or across healthy phases (horizontal analysis), winding deformation is accurately detected without oil drainage, core disassembly, or transformer de-tanking.
Q2: What types of winding faults can the XHBX1501 identify?
The XHBX1501 detects six primary fault categories: winding twisting (torsional deformation), bulging (radial expansion), axial displacement (vertical shifting of windings), winding tilting, inter-turn short circuits, and phase-to-phase contact short circuits. The expert auto-diagnosis system classifies severity into four grades: Excellent consistency, Good consistency, Fair consistency, and Poor consistency—for both horizontal comparison (A/B/C phases) and vertical comparison (before vs. after). This allows maintenance teams to prioritize interventions from routine monitoring to immediate overhaul.
Q3: What are the advantages of WiFi and Bluetooth connectivity over traditional USB-only instruments?
The XHBX1501 supports USB, WiFi, and Bluetooth, giving operators complete flexibility in field deployment. WiFi mode allows the instrument to be controlled wirelessly from an Android tablet or smartphone using the dedicated app—eliminating cable clutter around the transformer and enabling the operator to monitor measurements from a safe distance. Bluetooth provides short-range wireless for laptop control without USB cables. All three modes support the same full software functionality including real-time curve display, historical comparison, expert diagnosis, and automatic Word report generation. This is particularly valuable in substation environments where physical access around large transformers may be restricted.
Q4: How does the dual sweep mode (linear + segmented) benefit testing?
The XHBX1501 uniquely supports both linear sweep measurement (40,000 points, 10Hz-10MHz) and segmented sweep measurement (2,000 points, 0.5kHz-1MHz), providing compatibility with both major technical approaches used in China's power industry. The linear mode provides ultra-high-resolution data across the full frequency spectrum—ideal for detailed forensic analysis and baseline fingerprinting. The segmented mode focuses on the most diagnostically sensitive frequency band (0.5kHz-1MHz), enabling faster screening tests while maintaining compatibility with legacy measurement systems. This dual-mode capability ensures the XHBX1501 can be deployed alongside existing fleet data from any measurement tradition.
Q5: What are the MOQ, delivery terms, and after-sales support for the XHBX1501?
The minimum order quantity is 1 unit, with payment via T/T or L/C. Standard delivery is 5-10 working days in a protective aluminum alloy carrying case. Each XHBX1501 includes the main measurement unit, complete test lead set, USB cable, software installation package, and comprehensive user manual. The instrument carries a 12-month warranty covering manufacturing defects, with lifetime technical support including remote software assistance and diagnostic consultation. Annual supply capacity reaches 500 units. OEM/ODM configurations, extended warranty packages, and on-site training services are available upon request. For volume pricing or technical consultation, please contact our sales team.