🎯 Target Application: Specialized for transformer forensic failure analysis teams, post-incident investigation engineers, and insurance loss assessment professionals who require scientifically rigorous winding condition evidence. Distinct from routine maintenance testers, the XHBX1501 emphasizes dual comparison analysis (horizontal A-B-C phase + longitudinal before/after trending), DL/T911-2004 compliance for authoritative reporting, and automatic Word document generation — delivering court-admissible diagnostic conclusions for warranty claims, insurance assessments, and failure root cause determination.
XHBX1501 Transformer Winding Deformation Tester — FRA Technology
The XHBX1501 transformer winding deformation tester utilizes advanced Frequency Response Analysis (FRA) technology to accurately diagnose internal transformer faults. By measuring characteristic parameters of transformer windings across different frequency domains, this instrument quantifies response changes to determine winding deformation severity. The system provides clear diagnostic data to assess whether transformers require maintenance or overhaul — delivering the evidentiary rigor needed for failure investigations and insurance assessments.
Diagnostic Technology
The XHBX1501 employs DDS (Direct Digital Synthesis) high-speed frequency sweeping technology for precise fault diagnosis across a 100Hz–2MHz sweep range. A high-speed dual-channel 16-bit A/D sampling system captures both amplitude and phase response data simultaneously, enabling identification of:
- Winding twisting and bulging deformation
- Coil displacement and tilting
- Inter-turn short-circuit deformation
- Phase-to-phase contact short-circuit faults
Key Features
Dual Sweep Modes: Linear frequency sweep and segmented sweep measurement systems provide flexible test configurations optimized for different transformer sizes and investigation objectives.
Flexible Frequency Indexing: Supports both linear and logarithmic frequency indexing to match specific diagnostic requirements and standard compliance needs.
Dual Comparison Analysis: Horizontal comparison evaluates A-B-C phase similarities to identify asymmetrical deformation patterns. Longitudinal comparison overlays current measurements against historical baseline data to detect progressive degradation over time.
High-Speed Microprocessor: Superior integration with onboard processing delivers 1–2 minute per-phase test speeds, enabling comprehensive three-phase analysis within a single site visit.
Dual Communication: USB port for direct PC connection and optional wireless Bluetooth for remote operation and data transfer in hazardous or hard-to-reach transformer installations.
Automatic Report Generation: Software automatically compiles test data, comparison curves, and diagnostic conclusions into a formatted Word document — ready for inclusion in failure investigation reports, insurance claim submissions, and warranty documentation.
DL/T911-2004 Compliance: Full adherence to the Chinese power industry standard for frequency response analysis of power transformers, ensuring regulatory acceptability of diagnostic findings.
Technical Specifications
| Sweep Frequency Range |
100Hz – 2MHz |
| Amplitude Measurement Range |
-100dB – 20dB |
| Scanning Frequency Accuracy |
0.005% |
| Signal Output Impedance |
50Ω |
| Signal Input Impedance |
1MΩ |
| Signal Output Amplitude |
±10V Peak (Software Adjustable) |
| A/D Sampling |
Dual-Channel 16-Bit High-Speed |
| Test Speed |
1–2 Minutes per Phase Winding |
| Communication |
USB + Optional Wireless Bluetooth |
| Dimensions |
310 × 400 × 330 mm (Aluminum Case) |
| Compliance Standard |
DL/T911-2004 |
Frequently Asked Questions
Q1: How does FRA-based winding deformation testing support forensic failure investigations?
Frequency Response Analysis creates a unique electrical fingerprint of each transformer winding. After a failure event — whether from short-circuit forces, transportation damage, or manufacturing defects — the XHBX1501 compares the post-incident frequency response against baseline or sister-unit curves to identify which windings experienced deformation, the severity of displacement, and whether the damage pattern is consistent with the alleged failure mechanism. The dual comparison methodology (horizontal A-B-C phase + longitudinal before/after) provides objective, quantifiable evidence suitable for root cause analysis, insurance claim substantiation, and warranty dispute resolution.
Q2: What types of winding defects can the XHBX1501 identify?
The DDS high-speed frequency sweeping technology detects four primary deformation categories: (1) Winding twisting and bulging — radial deformation typically caused by electromagnetic forces during through-fault events; (2) Coil displacement and tilting — axial movement often resulting from transportation impacts or seismic events; (3) Inter-turn short-circuit deformation — localized insulation failure between adjacent turns; and (4) Phase-to-phase contact short-circuits. Each defect type produces distinctive frequency response signatures that the analysis software correlates against known failure patterns for rapid diagnosis.
Q3: Can test reports generated by the instrument be used as evidence in insurance or warranty claims?
Yes. The XHBX1501 is fully compliant with DL/T911-2004, the Chinese power industry standard for frequency response analysis on power transformers. The automatic Word report generation function compiles raw measurement data, frequency response curves, horizontal and longitudinal comparison overlays, and diagnostic conclusions into a single formatted document. When combined with proper chain-of-custody documentation and calibration records, these reports provide scientifically defensible evidence accepted by insurance adjusters, warranty administrators, and arbitration panels for transformer failure claims.
Q4: What is the difference between horizontal and longitudinal comparison analysis?
Horizontal comparison evaluates the frequency response similarity across the three phases (A, B, C) of the same transformer. Since all three phases share identical design and manufacturing characteristics, significant deviations in one phase's response curve indicate localized deformation in that specific winding. Longitudinal comparison overlays the current measurement against historical baseline data from the same transformer — typically the factory test record or a previous field measurement. Progressive deviations in longitudinal comparison reveal gradual winding degradation over time, while sudden changes suggest event-driven damage. Using both methods together provides the most comprehensive diagnostic picture.
Q5: What connectivity options are available for field and laboratory use?
The XHBX1501 offers dual communication interfaces: a standard USB port for direct connection to a Windows-based laptop or tablet running the analysis software, and optional wireless Bluetooth for remote operation. Bluetooth connectivity is particularly valuable in substation environments where the transformer under investigation may be located in a restricted-access area, at elevation, or in proximity to energized equipment — allowing the operator to control measurements and review data from a safe distance without running long communication cables through the switchyard.
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