Descrizione
KVRZ-S SFRA Sweep Frequency Response Analyzer
SFRA analyzer will quantify the response changes of internal winding parameters in different frequency domains, and then determine the degree of change of internal windings according to the variables, the amplitude of frequency response change, the area and the trend of frequency response change. Thus, it can judge whether the transformer has been severely damaged and needs to be overhauled according to the measurement results.
Features
- USB communication interface facilitates seamless connectivity between the laptop and the instrument.
- Control and data acquisition are executed through a high-speed, highly integrated microprocessor.
- The hardware integrates dedicated DDS digital high-speed scanning technology (from the USA), enabling precise fault diagnosis, including winding distortion, bulging, shifting, tilting, inter-turn short-circuit deformations, and inter-phase contact short-circuits.
- Utilizes high-speed dual-channel 16-bit A/D sampling, effectively capturing significant waveform changes during field tests, tap changer operations, etc.
- Signal output amplitude is software-adjustable, with a peak range of ±
- Automated analysis of test results and generation of electronic documents (Word format) by the computer.
- Equipped with dual measurement capabilities: linear frequency scanning and segment frequency scanning, conforming to the measurement standards of two technical groups in China.
- Amplitude-frequency characteristics adhere to national technical specifications for amplitude-frequency characteristic testers. The X-coordinate (frequency) offers both linear and logarithmic indexing options, facilitating curve printing based on user preference and requirements.
- Features an automatic test data analysis system
Technical parameter
Scan mode:
- Linear scanning distribution
Scanning measurement range: (10Hz) – (10MHz) 40000 scanning point, resolution 0.25kHz, 0.5kHz and 1kHz.
- Segment sweep frequency measurement distribution
Sweep frequency measurement range: (0.5kHz) – (1MHz), 2000 scanning points ;
(0.5kHz) – (10kHz)
(10kHz) – (100kHz)
(100kHz) – (500kHz)
(500kHz) – (1000kHz)
Other technical parameters:
| Amplitude measurement range | (-120dB) -(+20dB) |
| Amplitude measurement accuracy | 0.1dB |
| Accuracy of sweep frequency | 0.005% |
| Signal input impedance | 1MΩ |
| Signal output impedance | 50Ω |
| Signal output amplitude | ±20V |
| In-phase test repetition rate | 99.9% |
| Dimension of measuring instrument | (Length, width and height): 370X310X175(mm) |
| Dimension of aluminum alloy cable box | (Length, width and height): 420X300X320(mm) |
| Total weight | 20Kg |
| Operating temperature | -10℃- +40℃ |
| Storage temperature | -20℃- +70℃; |
| Relative humidity | <90%, noncondensing |
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