Do not worry when the DC and AC power supplies are faulty. Some small problems can be solved simply by eliminating them. Previously, Xiaobian shared the fault caused by "insulation amplifier" and swing, today specifically said the ground line and ordinary line caused by the problem.
 

 

500kW load bank
 

The DC and AC power supplies are faulty. The first attempt was to install a filter on the AC input line and adjust the filter constant several times, but could not find a constant that would solve the problem anyway.

The equipment that causes the failure of the DC and AC power supplies is the high power pulse-generating power produced by other companies installed in the customer's system and is the source of noise. Since not only the products provided by our company failed, but also the control system equipment of the customer also went wrong, so the customer is also looking for the reason.

The fault occurs in a device that shares the AC input and ground wires with the power source causing the fault. Ground wires appear to be a cause of both DC and AC power supply failures. The customer will resurface the AC input to the power supply that caused the failure, and the ground wire that caused the failure has been improved. After that, there's no wiggle problem.

Ultimately, it was power supplies made by other companies. Efforts over the past few months to come up with countermeasures have become meaningless. However, through this experience and lessons, we fully realize that ground wire and ordinary wire are very important elements in the design of DC power supply and AC power supply products.