Inverter maintenance technology - Delixi inverter

Create Date: 2024-8-30 12:03:23|Source: Delixi

(1) Fault characteristics

a) *** tripping may occur during operation, but if it is restarted after resetting, it often trips as soon as the speed rises.

b) has a large inrush current, but most drives can already be tripped, maintenance without damage. Because maintenance trips so quickly, it is difficult to investigate the magnitude of the current.

                               Inverter maintenance technology - Delixi inverter

(2) Identification and treatment

step, the first choice is to determine whether there is a short circuit. In order to facilitate identification, a voltmeter can be connected to the input side before starting again after reset, and when restarting, the potentiometer slowly rotates from zero, and together with the investigation of the voltmeter. If the output frequency of the inverter trips immediately as soon as it rises, and the pointer of the voltmeter has traces of instantaneous return to "0", it means that the output of the inverter has been short-circuited or grounded.

The second step is to determine whether it is a short circuit inside the inverter or an external short circuit. At this time, the wiring at the output end of the inverter should be disconnected, and then the potentiometer should be rotated to make the frequency rise, if it is still tripped, it is clarified that the internal short circuit of the inverter is clarified; If it is no longer tripped, it is clarified that it is a short circuit outside the inverter, and the line from the inverter to the motor, as well as the motor itself, should be checked.
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