Schweitzer Engineering Laboratories SEL-251 - Select Combinations of Relay Elements for Tripping and Other Purposes; Figure 2.6: SEL-251 Relay SEL OGIC Control Equations Block Diagram

Date Code 20000421 Specifications 2-13
SEL-251, -2, -3 Instruction Manual
Figure 2.6: SEL-251 Relay SELOGIC Control Equations Block Diagram
Select Combinations of Relay Elements for Tripping and Other Purposes
The 48-bit Relay Word contains relay elements, intermediate logic results, and programmable
logic variables.