On the basis of previous theoretical analysis and simulation results of fast loop closing-opening scheme for load transfer without power interruption of distribution lines with 30 degree phase angle difference

a systematic engineering method is proposed for the quick load transferring according to time characteristics of circuit breakers

quick detection capability of control equipment

time delay of message communication

etc. A circuit break group should be pre-designed for sequential control to prevent and defuse the possibility of refusing operation. Method of serial

parallel and hybrid sequential control are compared. The critical time duration calculation method is proposed. In respect of automation system

it is argued that a new station level loop control unit is necessary

and the construction of corresponding information management and automation system is discussed including their main function design. A substation and switchgear applicable loop control equipment has been successfully developed and applied in both 35 kV and 10 kV lines. The experimental verifications are also presented with analysis.