Sweep Frequency Response Analysis Test Instrument
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 sweep frequency response analysis test instrument based on the idea and the advanced technique.
SFRA-I Transformer Sweep Frequency Response Analysis Test Instrument can draw the frequency response curve accurately. Then we compare the curves horizontally or vertically to detect the deformation of the transformer.
And this Sweep Frequency Response Analysis Test Instrument 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 test equipment 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 test instrument 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% |
Accessories of SFRA-1 Sweep Frequency Response Analysis Test Instrument
| NO. | Amount | Remark |
| SFRA | 1 | |
| Power wire | 1 | |
| FRA Accessory bag | 1 | |
| SCI Accessory bag | 1 | |
| BNC T-junction | 3 | |
| BNC matched impedance 50 ohm | 2 | |
| 50 ohm BNC cable (-3) | 3 | Each 15 meters |
| Ground wire(2) | 1 | 8 meters |
| HV winding test wire (I) | 3 | 15 meters(red,yellow,green)120A |
| winding test wire (V) | 4 | 2 meters(red,yellow,green, black) |
| Short-circuit wires | 4 | 3 meters 1000A short-circuit wires |
| Metal clamp | 3 | |
| Fuse 5A | 3 | |
| USB wire(AA) | 1 | |
| Product instruction | 1 | |
| Survey report | 1 | |
| Product certification | 1 | |
| Product CD | 1 | |
| Print Page | 2 | |
| Regulator wires(select) | 1 | |
| Regulator wires(select) | 4 | 2 meters(red,yellow,green, black) |
| Regulator wires(select) | 3 | 2 meters(red,yellow,green, black) |
| Regulator wires(select) | 3 | 15 meters black |
