GDRZ-902 Transformer Sweep Frequency Response Analyzer
Introduction:
The structure and reference of the transformer is fixed after been made, Therefor, the frequency
response of each winding will be almost the same normally;
Some case 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 base on the idea and the advanced technique;
It could draw the frequency response curve accurately. Then we compare the curves horizontally or
vertically to detect the deformation of the transformer;
The tester is conformed to the standard of DL/T911 2004;
GDRZ-902 Sweep Frequency Response Analyzer for transformer distortions detection
Features:
Using the advanced technical of DDS;
Using the high speed and advanced microprocessor to design;
Using double channels of AD chip of 16 bits;
With seven inch LCD touch screen of which the brightness can be adjusted;
With thermal printer of which the print thick can be adjusted;
It could store one hundred and twenty groups of data, which could be read to current screen or upload to the PC;
With PC software using which we could upload data ,test, analyze data, print data, or create word document;
Using USB2.0 to connect to the device;
Tester dimension: 31cm * 15cm * 15cm;
Weight: 4.0KG;
Specifications
1Sweep modes Linear sweep,Section sweep
2Linear sweep 0.5KHZ-1MHZinterval 0.5KHZ 2000 dots
3 Section sweep
l 50HZ-100HZinterval 2HZ25 dots;
l 100HZ-1KHZinterval 20HZ45 dots;
l 1KHZ -10KHZinterval 50HZ180 dots;
l 10KHZ-100KHZinterval 0.2KHZ 450 dots;
l 100KHZ â?? 500KHZ interval 0.5KHZ 800 dots;
l 500KHZ â?? 1000KHZ interval 1KHZ500 dots;
4Test range (-100dB) - (+20dB)
5Test accuracy 0.1dB
6 Frequency accuracy1M Ω
8Signal output impedance 50 Ω
Transformer winding deformation test instrument based on the measurement of the characteristic parameters of transformer internal winding the internal fault frequency response analysis (FRA) method which is being developed in developed countries is adopted to make an accurate judgment of transformer internal fault. After the design and manufacture of transformer is completed the line coil and internal structure are determined. Therefore for a multi-winding transformer line coil if the voltage grade is the same and the winding method is the same the corresponding parameters (Ci Li) of each line coil should be determined. Therefore the frequency domain characteristic response of each line coil is determined accordingly and the frequency spectrum of the corresponding three-phase line coil is comparable to some extent. The distribution parameters of transformer windings will change when short-circuit between turns and phases occurs in the test process or collision occurs in the transportation process resulting in the relative displacement of the line coil and the deformation of the line coil caused by electromagnetic tension in the short-circuit and fault state during the operation process. Then it influences and changes the original frequency domain characteristics of the transformer that is amplitude change of frequency response and resonance frequency offset. The transformer winding test instrument developed according to the response analysis method is such a novel non-destructive testing equipment for transformer internal faults. It is suitable for the internal structure fault detection of 63kV ~ 500kV power transformer.
Transformer winding deformation test instrument based on the measurement of the characteristic parameters of transformer internal winding the internal fault frequency response analysis (FRA) method which is being developed in developed countries is adopted to make an accurate judgment of transformer internal fault. After the design and manufacture of transformer is completed the line coil and internal structure are determined. Therefore for a multi-winding transformer line coil if the voltage grade is the same and the winding method is the same the corresponding parameters (Ci Li) of each line coil should be determined. Therefore the frequency domain characteristic response of each line coil is determined accordingly and the frequency spectrum of the corresponding three-phase line coil is comparable to some extent. The distribution parameters of transformer windings will change when short-circuit between turns and phases occurs in the test process or collision occurs in the transportation process resulting in the relative displacement of the line coil and the deformation of the line coil caused by electromagnetic tension in the short-circuit and fault state during the operation process. Then it influences and changes the original frequency domain characteristics of the transformer that is amplitude change of frequency response and resonance frequency offset. The transformer winding test instrument developed according to the response analysis method is such a novel non-destructive testing equipment for transformer internal faults. It is suitable for the internal structure fault detection of 63kV ~ 500kV power transformer. product names Electric power transformer winding deformation test instrument Transformer winding deformation detector Transformer winding deformation meterTransformer winding deformation analyzer
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