About the product
The Sweep Frequency Response Analyzer is used for power transformers with a voltage grade of 66kV and above, and other transformers with special purposes. The power transformer is inevitably vulnerable to impulses from various fault short-circuit currents or physical collision in the process of operation and transportation, and the transformer windings may lose stability under the powerful electrodynamic force exerted by such short-circuit currents, which could result in permanent deformations such as local distortion, swelling, or dislocation and will severely affect safe operation of the transformer. Deformation of transformer windings is measured with the frequency response analysis method according to national standard DL/T911-2016/IEC60076-18 for the electric power industry, i.e., detect amplitude-frequency response characteristics 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.
1、Main Technical Characteristics
- Characteristics of transformer windings are measured with the frequency sweep method. Deformations of windings such as distortion, swell, or displacement of 66kV and above transformers are measured by detecting amplitude-frequency response characteristics of each winding, not requiring lifting of the transformer enclosure or disintegration.
- Quick measuring: measuring a single winding is within 2
- High frequency accuracy, higher than 0.001%.
- Digital frequency synthesis, with higher frequency stability.
- 5000V voltage isolation fully protects the safety of the testing computer.
- 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.
- The analysis software has powerful functions, and the software and hardware indicators satisfy national standard DL/T911-2016/IEC60076-18.
- Software management is humanized with a high degree of intelligence. You only need to press a key to complete all measurements after setting the parameters.
- The software interface is concise and vivid, with clear menus for analysis, save, report export, print, etc.
2、Main Technical Indicators
- Measuring speed: 1 min-2 min for single-phase winding
- Output voltage: Vpp-25V, adjusting automatically in test
- Output impedance: 50Ω
- Input impedance: 1MΩ (the response channel is built with 50Ω matching resistance)
- Frequency sweep scope: 10Hz-2MHz
- Frequency accuracy: 0.001%
- Frequency sweep manner: linear or logarithmic; frequency scan interval and number of sweep points are freely settable
- Curve display: amplitude-frequency curve
- Width of measuring dynamic range: -100dB~20dB
- Supply voltage: AC100-240V50/60Hz
- Tester weight: only 8kg
- Impendance measurement Voltage: 0.5~240Vac，Impendance measurement Current: 0.02~10Aac at internal output mode
- Impendance measurement Voltage: 100~500Vac，Impendance measurement Current: 10A~50Aac at external input mode
- Impedance measurement frequency: 50/60Hz
