How does the fingerprint method work?

It creates a unique frequency response plot for each winding. Comparing current results to this initial fingerprint helps identify degradation before it worsens.

Is technical support available?

Yes, we offer lifetime technical support to assist with product usage and maintenance throughout the equipment's lifespan.

Sfra Transformer Sweep Frequency Response Analyzer Sfra Test Set

Name: Sfra Transformer Sweep Frequency Response Analyzer Sfra Test Set
Brand: Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.
SKU: 939596525

Chongqing, ChinaChongqing Gold Mechanical & Electrical Equipment Co., Ltd.

US$20.00

1 Piece

Product profile

Customization

Available

After-sales Service

Lifetime Technical Support

Warranty

1 Year for Sfra Transformer Sweep Frequency Respon

Model NO.

GDRZ-903

Item

Sfra Transformer Sweep Frequency Response Analyzer

Test Standard

IEC60076

Sweep Modes

Linear Sweep/Section Sweep

Test Range)

(-100dB) - (+20dB

Reactive Power

0.2%±2 Digits

Frequency

45-65Hz 0.1%

Transport Package

Packed in Container

Specification

packing in 2 cases

Trademark

GOLD

Origin

Chongqing

HS Code

9031809090

Production Capacity

100PCS/Month Hipot Tester

Key features

Dual Detection Methods: Combines SFRA and low-voltage short-circuit impedance analysis to reduce incorrect judgments.

Transformer Fingerprinting: Creates a unique frequency response fingerprint for proactive maintenance and lifespan extension.

Versatile Sweep Modes: Supports Linear and Section sweep modes with adjustable frequency, interval, and scan dots.

High Precision Accuracy: Frequency accuracy < 0.01% and test accuracy within 0.2dB for reliable diagnostic results.

Comprehensive Testing Range: Covers test range from -100dB to +20dB and frequency from 10Hz to 2MHz.

Multi-Scenario Application: Ideal for factory QC, post-short circuit, pre/post-transportation, and scheduled maintenance.

Lifetime Technical Support: Provides lifetime technical support services for long-term operational assurance.

1-Year Warranty Coverage: Includes a 1-year warranty for the SFRA Transformer Sweep Frequency Response Analyzer.

Company profile

Chongqing Gold Mechanical & Electrical Equipment Co., Ltd.

Chongqing, China

Business Type: Manufacturer/Factory, Trading CompanyExport Year: 2008-05-03Nearest Port: Chongqing, ShanghaiAverage Response Time: ≤5.12hTerms of Payment: LC, T/T, PayPal, etc.International Commercial Terms(Incoterms): FOB, EXW, CFR, CIF, DDP, CPT

AI-Powered supplier vetting

SummaryChongqing Gold Mechanical & Electrical Equipment Co., Ltd. is identified as both a trading company and manufacturer/factory in China, with stated capabilities in oil, electrical, fire, and measuring equipment. Evidence indicates more than 10 production lines, 11–20 R&D engineers, 11–20 quality-control staff, and 50 total staff. The supplier holds ISO 9001 certification, has self-operated import/export rights, and reports peak- and off-peak-season lead times within 15 working days. It describes international sales coverage across multiple regions and adherence to ISO, ASTM D, IP, and GB standards. However, the provided information does not establish after-sales procedures, customization services, or specific customer case details. Financial credibility cannot be assessed because financial data is excluded from this analysis.

Supplier typeThe supplier is explicitly described as a factory and as both a trading company and manufacturer/factory. Its stated business involves researching, designing, developing, and producing scientific and measuring instruments, supporting classification as a manufacturing-oriented supplier.

CertificationsThe supplier explicitly reports ISO 9001 certification and states that manufacturing follows ISO, ASTM D, IP, and GB standards. ISO 9001 is direct evidence of a certified quality-management system, while the standards statement supports structured manufacturing compliance.

R&D capabilityThe supplier describes itself as a high-tech enterprise engaged in research, design, development, and production, with 11–20 years of total R&D-engineer experience and stated continuous innovation. These details explicitly support an established innovation function.

Production capacityThe supplier reports more than 10 production lines, 11–20 quality-control staff, 50 total staff, and lead times within 15 working days in both peak and off-peak seasons. Its described manufacturing scope covers oil testers, electrical testers, fire-testing equipment, and oil purifiers, providing direct evidence of operational production capacity.

Product Q&A

Q:What is the SFRA testing method?

SFRA evaluates mechanical integrity by measuring electrical transfer functions over a wide frequency range to detect deformation in core, windings, and clamping structures.

Q:Why use two detection methods?

Using both SFRA and low-voltage short-circuit impedance analysis effectively reduces incorrect judgments regarding transformer deformation.

Q:What are the main occasions for SFRA?

SFRA is performed during factory quality checking, before short circuit tests, before and after transportation, and during ongoing scheduled maintenance.

Q:What sweep modes are available?

The device supports Linear Sweep and Section Sweep modes with customizable frequency intervals and scan dots via PC.

Q:What is the frequency range?

The test frequency range covers 10Hz to 2MHz, with specific intervals and dot counts adjustable for different sweep modes.