January 09, 2025

AC frequency conversion power supply use precautions

First, the current maintenance of the AC variable frequency power supply maintenance task

Eliminate the dust inside the machine, reflect the fan operation status and check the system parameters of the conditioning AC variable frequency power supply.

Second, stop overloading

The maximum starting load of the AC variable frequency power supply is preferably controlled within 80%. Assuming overloading, the inverter triode is often broken down under the shape of the inverter. The actual proof: For the vast majority of AC variable frequency power supplies, it is the best task to control the load within 30% to 60% of the additional input power range.

Third, stop frequently blocking and turn on the AC variable frequency power supply. Generally, after blocking the AC variable frequency power supply, wait at least 6 seconds before turning on the AC variable frequency power supply. Otherwise, the AC variable frequency power supply can enter the shape of “start failure”, ie AC frequency conversion. The power supply enters a shape that has no mains input and no inverter input.

4. When using AC variable frequency power supply, it is necessary to abide by the relevant rules of the manufacturer's product manual to ensure that the front line, neutral line and ground line meet the requirements, and users should not arbitrarily change their mutual order. For example, the AC input wiring of a US brand AC variable frequency power supply is exactly the opposite of the AC input socket of China. There are also requirements such as three-phase AC variable frequency power supply to pay attention to the phase sequence effect, otherwise there will be phase sequence error alarm, as well as other brands.

5. The place where the AC variable frequency power supply is placed should be protected from direct sunlight and sufficient ventilation space.

6. Strictly stop according to the correct startup and shutdown sequence to prevent the voltage input of the AC variable frequency power supply from shaking suddenly due to the sudden load or sudden load shedding, so that the AC variable frequency power supply cannot perform normal tasks.

Input/Output Connector

Input/Output Connector

Input/Output Connector

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