Abstract
The paper raises a variant of architecture of realization of logical line protection on the basis of implementation of modern technologies. The idea of development and implementation of digital substations, the core of which is the application of IEC 61850 standard, has been developing at a great pace in the world. The appearance of this standard in substations opens new ways of realization of protection of electrical installations. In this article we consider the method of construction of line protection using the method of logical selectivity, and as the main terminals are considered Sepam devices series 1000+, as one of the most widely distributed devices in the electric power industry of the Russian Federation, the basic support for the standard IEC 61850.