In view of the situation where the drawing of a protective logic diagram has only the displaying function but no transparent analysis of the logic actuation needed by microprocessor protection， a new logic quasi-hybrid protective relaying operation model based on the programmable time Petri net（PTPN） is developed. The relaying component base and logic analytic modules based on the PTPN and vector diagram pixels are extended. A graphic protective logic analytic platform is developed that is suitable for application in protective relaying playback and relaying program debugging， thus meeting the requirement for dynamic display and protective relaying program debugging. The correctness and reliability of the model proposed is verified with an example.