Generally speaking, what performance acceptance tests of transformers can we provide customers with? The specific content is as follows:
A)Type test (test report can be provided)
Temperature rise test
Lightning impulse test
Special test items include sound level measurement, short circuit withstand test, environmental test, climate test and combustion performance test
B) Factory test (routine test)
Winding resistance measurement
Voltage ratio measurement and connection group label verification
Short circuit impedance and load loss measurements
No-load test and no-load current measurement
Externally applied pressure test
Induction withstand voltage test
Partial discharge measurement
C) Field test
Measure winding DC resistance
Check the transformer ratio of all taps
Check the three-phase wiring group of the transformer and the polarity of the single-phase transformer lead wires
Measure winding insulation resistance, absorption ratio or polarization index
Measure winding dielectric loss factor
Measure winding DC leakage current
Winding AC withstand voltage test
Winding partial discharge test
Impact closing test at rated voltage
Check phase
Measurement noise