The vector stencils library "Maintenance" contains 14 symbols for maintaining electrical and electronic systems, including test, feedback and reference signals; pulses; relay contacts and coils; and composite and amplifier circuits.
Use these shapes for drawing electronic diagrams in the ConceptDraw PRO diagramming and vector drawing software extended with the Electrical Engineering solution from the Engineering area of ConceptDraw Solution Park.
www.conceptdraw.com/solution-park/engineering-electrical