Huazheng Electric HZ-600A SFRA Sweep Frequency Response Analyzer

I. Overview

The Sweep Frequency Response Analyzer is used for power transformer with voltage grade of 6kV and above and other transformers with special purpose. The power transformer is inevitably vulnerable to impulse of various fault short-circuit current or physical collision in the process of operation and transportation and the transformer windings may lose stability under the powerful electro-dynamic force exerted by such short-circuit current, which could result in permanent deformations such as local distortion, swell or dislocation and will severely affect safe operation of the transformer. Deformation of transformer windings is measured with frequency response analysis method according to national standard DL/T911-2016/IEC60076-18 for electric power industry, i.e. detect amplitude-frequency response characteristic of each transformer winding and make vertical or horizontal comparison of the detection result to judge possible deformation of the transformer winding based on change of amplitude-frequency response characteristics.

II.Main Functions And Features

1.Characteristics of transformer windings are measured with frequency sweep method. Deformations of windings such as distortion, swell or displacement of 6kV and above transformer are measured by detecting amplitude-frequency response characteristics of each winding, not requiring lifting of transformer enclosure or disintegration.

2.Quick measuring, measuring of a single winding is within 2 minutes.

3.High frequency accuracy, higher than 0.001%.

4.Digital frequency synthesis, with higher frequency stability.

5.5000V voltage isolation fully protects safety of the testing computer.

6.Able to load 9 curves at the same time and automatically calculate parameters of each curve and diagnose winding deformations to provide the reference diagnosis conclusion.

7.Analysis software has powerful functions and software and hardware indicators satisfy national standard DL/T911-2016/IEC60076-18.

8.Software management is humanized with high degree of intelligence. You only need to click one key to complete all measurements after setting of parameters.

9.The software interface is concise and vivid, with clear menus of analysis, save, report export, print, etc.

10.Use windows platform compatible with Windows 2000/Windows XP/Windows 7/windows 8/Windows10.

11.Use database to save test data and render concise and easy data management.

12.Able to load 9 curves at the same time and automatically calculate parameters of each curve and diagnose winding deformations to provide the reference diagnosis conclusion.

13.Software management function is powerful that takes into full account of site use demand. Measuring data is automatically saved and exported to form Word version test report (require installation of relevant Office software) or JPG photo report to facilitate the user to export test report.

14.The software has distinctive humanized feature. Measuring conditions are mostly options, which exempt the need of many inputs and bring about easier operation.

15.The software has high degree of intelligence. You only need to click one key to complete all measurements after connection of input and output signals.

16.The software interface is concise, vivid and practical.

III.Main Technical Index

1.Measuring speed: 1 min- 2 min for single-phase winding

2.Output voltage: Vpp-25V, adjusting automatically in test

3.Output impedance: 50Ω

4.Input impedance: 1MΩ (the response channel is built with 50Ω matching resistance)

5.Frequency sweep scope: 10Hz-2MHz

6.Frequency accuracy: 0.001%

7.Frequency sweep manner: linear or logarithmic, frequency sweep interval and number of sweep points are freely settable

8.Curve display: Mag-freq. curve

9.Measuring dynamic range: -100dB~20dB

10.Power source: AC100-240V 50/60Hz

11.Net weight: 3.6kg

IV.Method Of Operation

1.Operation Flow of System

Ground collector

Connect collector and transformer winding

Connect collector and computer

Start up computer

Power on collector

Log in software

Input information

Select end-frequency and adjust testing parameter

Select winding

Start testing

Replace test winding

Select winding

Start test

Repeat above process until all winding tests are done

Analyze data

Export report

Turn off software

Power off collector

Disconnect collector and computer

Remove transformer winding

Test completed.