Schneider ATS48 soft starter maintenance
Model: ATS48 soft starter Schneider
Cause of failure: boot times PHF fault.
According to the failure of a small motor test mode or PHF fault, check module is good, the current transformer is also normal, suspected of driving circuit fault, the oscilloscope test feedback circuit on-line measurement, found by static measurement has two feedback resistor value anomaly, disconnect the cable, the resistance value of normal cleaning cable joint after the resistance values returned to normal on the normal operation of electrical test. Fix after all the normal operation of the test.
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