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usualy there are many standert the desgine enginner need to know to make the document . so one-line diagrams, use graphic symbols in accordance with IEEE and. ANSI standards
check for std related to:
Graphic Symbols for Electrical and Electronic Diagrams.
Electrical and Electronics Diagram
such as :
C42.100-1992
100-1977
Y32.2-1975
315-1975
Y14.15-1966 (R1973)
the signal line diagram is the vital road map for all future testing ,service and maintenance activities. reference new single line diagram is to switchgear
