The following sections are discussing selected aspects in regards the maintenance and periodical testing of REX615 Protection and control relay. The maintenance activities are here referred as specific actions, documented by the relay manufacturer, to be performed to the relay according to predefined time intervals. There are several factors influencing the optimum frequency of periodical testing, as well as the method of testing. Local legislation, insurance policy terms, customers’ own maintenance practices, level of technology used in the installation and other similar issues certainly have an impact which is not possible to comprehensively cover here.
These sections do not discuss the personnel work safety related issues, nor the expected skill level of the testing and maintenance engineers or technicians. These are obviously of paramount importance but must be instructed and supervised by the party responsible.