Principle of phase sequence protection circuit for three-phase electric air conditioner

The three-phase electrical phase sequence of air conditioner must be connected in strict accordance with the specified phase sequence, otherwise the motor will reverse and the air conditioner will not work normally. Its phase sequence protection circuit automatically completes the phase sequence detection, and when the phase sequence error is found, it will automatically switch the phases of the two phases, thus realizing the air conditioner to work under the correct phase sequence. Please adopt it.