Transformer Winding Deformation Tester

Precision Sweep Frequency Response Analyzer and transformer winding deformation tester for non-intrusive mechanical condition assessment. Features 10 Hz to 2 MHz sweep range, -100 dB to +20 dB dynamic range, 9-curve comparative analysis, and compliance with IEC 60076-18 and IEEE C57.149 standards.

Looking for reliable transformer diagnostic equipment or factory-direct pricing? Contact Us today to speak with our engineering team and request a quotation.

Sweep Frequency Response Analyzer & Transformer Winding Deformation Tester

The transformer winding deformation tester is a diagnostic system engineered to evaluate the mechanical structural integrity of power transformers without tank opening.

Under operational stresses such as short-circuit fault currents, seismic events, or transportation impact forces, transformer windings can experience axial displacement, radial distortion, tilt, or clamping pressure loss. By utilizing Frequency Response Analysis (FRA) principles, this instrument measures amplitude-frequency characteristics to detect subtle mechanical changes before electrical failure occurs.

As a high-precision Sweep Frequency Response Analyzer, the system injects a continuous frequency signal into the transformer winding and measures the output response across a spectrum ranging from 10 Hz to 2 MHz. Comparing these curves against baseline or historical data provides objective assessment for condition-based maintenance.

For single-product parameters and software capabilities, you can view our dedicated Sweep Frequency Response Analyzer page.

Technical Specifications & Compliance Standards

The table below outlines the core performance specifications and applicable international standards:

Parameter / Feature	Technical Specification Range	Applicable Testing Standards
Frequency Sweep Range	10 Hz to 2 MHz (Linear or Logarithmic sweep)	IEC 60076-18 / DL/T 911
Frequency Accuracy	< 0.001% (Direct Digital Synthesis technology)	IEEE C57.149 / GB/T 1094.18
Dynamic Range	-100 dB to +20 dB	IEC 60076-18 Clause 6
Input / Output Impedance	Output: 50 Ω | Input: 1 MΩ (Built-in 50 Ω matching)	IEEE C57.149 Clause 5
Voltage Isolation	5000 V Isolation Protection for connected host computer	IEC 61010-1
Testing Speed	1 to 2 minutes per single-phase winding sweep	IEEE C57.149 Clause 7
Data Overlay Capacity	Concurrent loading and calculation for up to 9 curves	DL/T 911-2016 Annex A

Core Technical Features

1. High Signal Stability and Resolution

The instrument utilizes Direct Digital Frequency Synthesis (DDS) to provide stable sine wave signals across the spectrum. With a dynamic measurement range of -100 dB to +20 dB, it detects minor shifts in winding transfer functions caused by internal physical movement.

2. Multi-Curve Comparative Analysis

The companion software supports loading up to 9 frequency response curves concurrently. Field engineers can perform phase-to-phase symmetry comparison, historical trend tracking, or comparison against original factory baseline curves to reach definitive technical conclusions.

3. Automated Parameter and Correlation Calculation

Integrated algorithms automatically process curve correlation coefficients according to standard mathematical models (such as DL/T 911). This provides standardized parameter outputs, reducing manual interpretation errors during substation audits.

4. Non-Intrusive Field Testing Setup

Testing requires no transformer cover removal or oil draining. Grounding connectors, shielded measuring leads, and simple terminal clamps allow diagnostic data collection following short-circuit trip events or long-distance transit.

Primary Application Scenarios

Transformer Manufacturing & Factory Acceptance Testing (FAT)

• Baseline Recording: Establishing reference frequency response curves prior to factory dispatch for future field comparison.

• Structural Verification: Quality control verification after high-voltage impulse or short-circuit withstand testing.

Power Utilities & Grid Operations

• Post-Fault Assessment: Inspecting winding condition following near-end short-circuit faults or protection trip events.

• Relocation & Transit Audit: Verifying mechanical integrity after road, rail, or sea transportation of heavy substation transformers.

Service Contractors & Testing Laboratories

• Preventive Asset Health Checks: Periodic condition monitoring during scheduled transformer overhauls.

• Forensic Failure Analysis: Diagnostic assessment to guide maintenance decisions on aging power grid assets.

Functional Capabilities

Measures amplitude-frequency response characteristics, detects internal winding tilt, swelling, radial deformation, and core displacement. The system features a 10 Hz to 2 MHz sweep spectrum, 5000 V voltage isolation, automatic report export in Word or image formats, and compatibility with Windows platforms.

To integrate this unit into a broader diagnostic setup, you can inspect our complete Transformer Test Set selection.

Quality Management & Global Delivery

Accurate diagnostic data forms the foundation of modern condition-based asset management. Our engineering team focuses on measurement precision and operator protection, building hardware protection circuits and noise-suppression architecture into every testing system to ensure reliable field operation.

When power utilities and industrial laboratories choose Weshine Electric as their Electrical Testing Equipment Supplier, they gain access to direct engineering guidance, responsive spare parts availability, and long-term service support for critical power grid infrastructure.