WDT-200 use SFRA method to assess whether or not a transformer has been subject to mechanical damage. It is built into a tough carry case which includes an on-board computer making it even more transportable. There is a large bright screen to make it comfortable to use even in bright sun light. Data can be stored on the hard-drive and can be downloaded using the USB port.
WDT-200 injects a sinusoidal excitation voltage with a continuously increasing frequency into one end of the transformer winding and measures the signal returning from the other end. Due to a direct measurement in the frequency domain, no additional data processing is required.
The comparison of input and output signals generates a unique frequency response, which can be compared with reference data. Thereby, deviations can indicate changes of internal components. These deviations can be directly related to different sections of the frequency range and they can be discerned from each other.
Winding deformations and displacements
Shorted turns and open windings
Broken clamping structures
Core connection problems
Partial winding collapse
Faulty core grounds
Core movements
One solution in one box for easy and comfortable testing With WDT-200 you get all the required components in just one box. This makes testing quite comfortable and the system easy to transport. Its newly developed, extremely robust housing is ideal for on-site testing.


| Output Voltage | Vpp-25V automatic adjustment during test |
| Input Impedance | 1MΩ(Built-in 50Ω matching resistance in the test channel) |
| Frequency Sweep Range | 10Hz-16MHz(30MHzoptional) |
| Output Impedance | 50Ω |
| Measuring Dynamic Range | -120dB~20dB |
| Frequency Accuracy | 0.00001 |
| Power Supply | 180-270VAC,50/60Hz |
| Environmental Conditions | Operatingtemperature:-10℃~50℃ Humidity:≤90% |
| Net Size | 310×240×75mm |
| Net Weight | 4.5kg |
| Total Weight | 15kg(Including case and test cable set) |


