During on-site operation and maintenance, it is common to encounter situations where winding deformation test data does not match historical data. First check whether the test wiring and grounding are reliable, then confirm whether the sweep frequency parameter settings are consistent. The WFT-6200 transformer winding deformation tester covers a sweep frequency range from 0.5kHz to 1MHz, with resolutions of 0.02kHz, 0.2kHz, and 1kHz in each frequency band, fully reflecting the winding frequency response characteristics.
The device operates at temperatures from -10℃ to +40℃, storage temperature from -20℃ to +70℃, operating humidity 0–80%, and operating power supply AC220V±10%. Strong electromagnetic interference sources should be avoided on site, and good grounding should be confirmed before testing.
Frequency response curve shifts in the low-frequency band are mostly related to wiring contact resistance, while obvious peak-valley changes in the mid-to-high frequency band require comparative analysis with historical data. It is recommended to maintain the same sweep frequency points and wiring method for each test to facilitate longitudinal comparison.
It is suitable for transformer winding deformation detection, auxiliary analysis of short-circuit impedance or leakage reactance measurement, and winding condition comparison before commissioning and after major overhaul. The device supports current conditions from 0.5A to 20A, adapting to common working conditions at substation sites.
