Why does Hekang high-voltage inverter turn off the inverter first and then turn off the switch cabinet?

The main reasons for this situation are as follows:

1. Safety considerations of high-voltage inverter: High-voltage inverter is the equipment used to control the motor, with high-voltage and high-power circuits inside. High-voltage inverter may produce large current impact and electromagnetic interference when starting, so switching on the inverter first can reduce the impact and interference on switchgear and other equipment.

2. System stability considerations: Hekang high-voltage inverter needs a period of time to complete the startup and initialization process, including power stability, internal circuit self-inspection, parameter configuration and other steps. In this process, the high-voltage inverter is in an unstable state. If the switch cabinet is turned off first, the instantaneous voltage of the power supply may drop, which will affect the normal start-up and operation of the high-voltage inverter.

3. Operation sequence logic: According to the operation sequence of switching on the inverter first and then switching on the switchgear, the probability of accidents can be effectively reduced. If the switch cabinet is connected first, and then the inverter is connected, there may be dangers such as arc and spark when the switch cabinet is connected, which will bring risks to the safety of operators and equipment.