Imbalance of three-phase load of distribution network will bring economic losses and risks to both power system and the users. At present

the commutation switch type three-phase load automatic regulation device is used widely in distribution network to solve the problem of unbalance of three-phase load.In order to verify whether the logical correctness and other commutation performance of the existing commutation switch type three-phase load automatic regulation device comply with the actual application requirement

a kind of detection system for the commutation switch type three-phase load automatic balance device is designed and developed so to achieve fast and convenient detection work by way of judging whether the relevant electrical parameters obtained from sampling during phase commutation meet the detection method specified by the technical specification requirements. For verifying the effectiveness and practicability of the designed device

it is used to test the smart commutation switches on the market. It is finally concluded that the detection device can quickly and conveniently judge whether the logic correctness and other commutation performance of the device to be detected meet the requirements.