Sweep Frequency Response Analysis on Power Transformers Sfra Transformer Winding Distortion Tester

• After-sales Service: Lifetime Technical Support
• Warranty: 1 Year for Sfra Analyzer
• Product Name: Transformer Winding Distortion Tester
• Sweep Modes: Linear Sweep/Section Sweep
• Test Range: (-100dB) - (+20dB)
• Frequency Accuracy: < 0.01%
• Model NO.: GDRZ-903
• Signal Input Impedance: > 1m Ω
• Signal Output Impedance: 50 Ω
• Transport Package: Wooden Case
• Trademark: GOLD
• Origin: Chongqing
• HS Code: 9031809090
• Production Capacity: 200PCS/Month

Product Description

Sweep Frequency Response Analysis on Power Transformers
SFRA Transformer Winding Distortion Tester

Sweep Frequency Response Analysis (SFRA) testing is a technique used to assess the mechanical and electrical condition of equipment that contains windings, such as transformers and reactors. The SFRA instrument applies a signal at various discrete frequencies to the winding and measures the corresponding returning signals. By analyzing the graphical results or comparing them with previous test results or those from similar equipment, any physical or electrical changes or damage can be detected. This provides valuable insights into the equipment's integrity and can help prevent potential failures.
 

Product advantages

1. There are two test methods available for transformer testing, namely the Sweep Frequency Response Analysis (SFRA) Method and the Low-voltage Short-circuit Impedance (LSCI) Method. These methods follow international test standards, specifically IEC60076-18-2012 and IEC60076-5-2006.
2. The transformer testing device employs advanced DDS technology and a high-speed, advanced microprocessor design. It utilizes a 16-bit AD chip and features a 7-inch LCD touch screen with adjustable brightness and a thermal printer with adjustable printing thickness.
3. The device can store up to 120 groups of SFRA data, 50 groups of LSCI data, and 30 groups of SCI data, which can be easily accessed through the touch screen interface or uploaded to a PC using the included PC software. The software allows for data analysis, printing, and the creation of word documents.
4. Connectivity is provided by a USB2.0 port, ensuring easy and reliable communication with the device.

Product applications
The Sweep Frequency Response Analysis (SFRA) technique can be utilized in the following situations:

- Obtaining the initial signature of a healthy transformer for future comparisons
- Conducting periodic checks as part of regular maintenance
- Conducting tests immediately after a major external event, such as a short circuit
- Verifying the integrity of the transformer after transportation or relocation
- Studying the effects of earthquakes on transformers
- Conducting pre-commissioning checks

Detail presentation

Product specification

Sweep Frequency Response Method  Two different sweep modes
Linear sweep	10HZ-1MHZ,interval 0.5KHZ, 2000 dots; 100HZ-2MHZ,interval 0.5KHZ,2000 dots; 10HZ-1MHZ, interval 0.25KHZ,4000 dots (PC available) 100KHZ-2MHZ,interval 0.25KHZ,4000 dots(PC available) Frequency, interval, and scan dots can be set(PC available)
Section sweep	10HZ-100HZ,interval 1HZ,90 dots; 100HZ-1KHZ,interval 5HZ ,180 dots; 1KHZ-10KHZ ,interval 50HZ,180 dots; 10KHZ-100KHZ, interval 0.2KHZ,450dots; 100KHZ-300KHZ ,interval 0.5KHZ,400dots; 300KHZ-1000KHZ ,interval 1KHZ,700dots
Test range	(-100dB) - (+20dB)
Test accuracy	(-80dB) - (+20dB) 0.2dB (-100dB) - (-80dB) 1.0dB
Frequency accuracy	< 0.01%
Signal input impedance	> 1M Ω
Signal output impedance	50 Ω
In-phase test repetition rate	99.5%
Short-circuit Impedance and Generator Rotor AC Impedance
AC impedance	0-999.999Ω 0.2%±2 digits
AC voltage	0-600V 0.2%±2 digits
AC ampere	0-120A 0.2%±2 digits
Active power	cosφ>0.1  0.5%±2 digits cosφ<0.1  1.0%±2 digits
Reactive power	0.2%±2 digits
Frequency	45-65HZ 0.1%

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