Product introduction

This UHV-312 Sweep Frequency Response Analysis Test Equipment integrates two core diagnostic methods for transformer winding deformation-Sweep Frequency Response Analysis (SFRA) and Sweep Frequency Impedance Analysis (SFIA)-into a single portable device. It represents the mainstream and highly efficient solution in winding deformation detection.It is an intelligent instrument specifically designed for measuring the impedance characteristics of large and medium-sized transformers

Technical parameter

Measuring speed	Single-phase winding 1 min -2 min
Output voltage	Vpp-20v, automatically adjusted during testing
Output impedance	50Ω
Input impedance	1MΩ (response channel built-in 50Ω matching resistance)
Sweep range	100 hz - 2 MHZ
Frequency accuracy	0.005%
Sampling frequency	100MSPS
Sweep mode	Linear or logarithmic, sweep frequency and points can be set arbitrarily
Curve display	Amplitude-frequency curve
Wide measurement dynamic range	-120dB to 20dB
Impedance method to measure voltage	0 ~ 220V
Impedance method measures current	0 to 10A
Impedance frequency	50Hz/60Hz

Key Features & Advantages of sweep frequency response analysis test equipment

1. Integration testing: Core function, one click start to complete SFRA and FRA testing simultaneously.
2. Efficient and convenient: significantly improving on-site work efficiency and reducing the labor intensity of testing personnel.
3. Comprehensive and accurate: By combining the sensitive points of the two methods, a more comprehensive assessment of the mechanical state of the winding is provided, resulting in more accurate and in-depth diagnostic results.
4. Strong anti-interference ability: Modern 2-in-1 instruments usually use advanced digital signal processing technology and anti-interference algorithms to obtain stable and reliable data in complex substation environments.
5. Powerful data analysis and management:
Automatic comparison: Built in database management allows for easy automatic comparison with historical data, factory data, transformer data of the same model, and phase to phase data.
Multiple analysis views: Provides various views such as amplitude frequency curve, phase frequency curve, impedance amplitude frequency curve, impedance phase frequency curve, polar coordinate graph, etc., supporting multiple analysis methods such as curve superposition, difference calculation, correlation coefficient calculation, etc.
Intelligent diagnostic assistance: Some high-end instruments have preliminary diagnostic prompt functions based on expert libraries or artificial intelligence.
Report generation: One click generation of standardized test reports (in Word, PDF, Excel, and other formats), including test data, curve comparison charts, analysis conclusions, etc.
6. Portable design: sturdy and durable, suitable for on-site use, usually equipped with large capacity batteries, touch screens, and large capacity storage.
7. Safe and reliable: The test voltage is low (usually<10V), which belongs to non-destructive testing and is safe for personnel and equipment.

Applications of sweep frequency response analysis test equipment

New transformer acceptance: Establishes baseline "fingerprint" data.

Post-short-circuit inspection: Checks for deformation after fault events.

Post-transport/rigging audit: Verifies structural integrity.

Routine maintenance: Monitors long-term mechanical trends.

Pre-repair diagnostics: Locates faults to guide overhaul.

Aging transformer assessment: Evaluates structural stability.

Frequently Asked Questions

1. What is a transformer winding deformation tester?
Transformer winding deformation tester is a professional testing equipment used to detect the mechanical structure status of transformer windings. By analyzing the frequency response characteristics of transformer windings, it is possible to determine whether there are problems such as deformation, displacement, distortion, and inter turn abnormalities in the windings, providing a basis for evaluating the operating status and diagnosing faults of transformers.
2. What does the sweep frequency response analysis test equipment mainly detect?
Mainly used to detect whether there are mechanical structural changes in transformer windings after transportation, installation, short-circuit impact, or other abnormal working conditions, including axial displacement, radial deformation, distortion, bulging, inter turn short circuit, and overall structural abnormalities.
3. Does the sweep frequency response analysis test equipment need to disassemble the transformer?
Generally, it is not necessary to disassemble the transformer. The testing mainly uses the bushing terminals of the transformer for wiring, and can be carried out after power outage and completion of safety measures, which can reduce the workload caused by dismantling equipment.
4. Is the sweep frequency response analysis test equipment fast in testing speed?
The modern winding deformation tester adopts digital acquisition and automatic analysis technology, which can automatically complete test data acquisition, curve display, and result analysis. The specific testing time depends on the testing frequency band, testing object, wiring method, and on-site conditions.
5. Can test data be saved?
Okay. Most professional transformer winding deformation testers have functions such as data storage, curve preservation, historical data comparison, and data export, which facilitate the establishment of transformer testing archives and subsequent state analysis.
6. Can the sweep frequency response analysis test set be used for on-site testing?
Okay. This device is mainly designed for on-site inspection of power transformers and is also suitable for substations, power plants, power maintenance units, transformer manufacturing enterprises, and testing institutions.

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