Transformer SFRA Sweep Frequency Response Analyzer
I. Introduction:
Since the structure and reference of transformer are fixed after being made, the frequency response of each winding is almost same normally.
Some cases ,such as cut off between circles or phases in experience, cut off or winding moved for the pull of power in running, winding moved for hit in transportation, could change the reference of the transformer ,of which the frequency response will be changed, we could detect the deformation according to the frequency response curve.
Our company has designed the winding deformation tester based on the idea and the advanced technique.
SFRA-I Transformer SFRA Sweep Frequency Response Analyzer could draw the frequency response curve accurately. Then we compare the curves horizontally or vertically to detect the deformation of the transformer.
And Transformer SFRA Sweep Frequency Response Analyzer is conformed to the standard of DL/T911 2004.
II.Main Features
1. Using the advanced technical of DDS;
2. Using the high speed and advanced microprocessor to design;
3. Using double channels of AD chip of 16 bits;
4. With seven inch LCD touch screen of which the brightness can be adjusted;
5. With thermal printer of which the print thick can be adjusted;
6. SFRA Sweep Frequency Response Analyzer could store 40 groups of data, which could be read to current screen or upload to the PC;
7. With PC software using which we could upload data ,test, analyze data, print data, or create word document;
8. Using USB2.0 to connect to the device；
9. Tester dimension:31cm X 15cm X 15cm；
10. Weight:4.0KG;
11. SFRA Sweep Frequency Response Analyzer is conformed to the standard of DL/T911 2016 and can be used for IEC60076-18:2012.
II. Specifications:
| Two different sweep modes: Linear sweep, Section sweep |
| Linear sweep |
10HZ-1MHZ interval 0.5KHZ 2001 dots (conform to DL/T911 2016)
10HZ-1MHZ interval 0.25KHZ 4001 dots(PC available)(conform to DL/T911 2016)
100HZ-2MHZ interval 0.25KHZ 4001 dots(PC available)
Initial frequency, interval and scan dots can be set(PC available)
|
|
Section sweep
(conform to DL/T911 2016)
|
10HZ-20HZ interval 1HZ 11 dots
20HZ-100HZ interval 2HZ 40 dots
100HZ -1KHZ interval 3HZ 300 dots
1KHZ-10KHZ interval 20KHZ 450 dots
10KHZ –100KHZ interval 0.3KHZ 300 dots
100KHZ – 1000KHZ interval 1KHZ 900 dots
|
|
Section sweep
(conform to IEC60076-18:2012)
|
20HZ-100HZ interval 2HZ 40 dots
100HZ -1KHZ interval 2HZ 450 dots
1KHZ-10KHZ interval 20HZ 450 dots
10KHZ –100KHZ interval 0.2KHZ 450 dots
100KHZ – 1000KHZ interval 2.5KHZ 360 dots
1000KHZ – 2000KHZ interval 4KHZ 250 dots
|
| Test range |
(-100dB) - (+20dB) |
| Test accuracy |
(-40dB) - (+20dB)0.2dB
(-60dB) - (-40dB)0.5dB
(-80dB) - (-60dB)1.0dB
|
| Frequency accuracy |
<0.01% |
| Signal input impedance |
>1M Ω(Connected according to DL/T911 2016) |
| Signal output impedance |
50 Ω |
| In-phase test repetition rate |
99.5% |
