This illustration shows three 3‑phase switches (marked A, B, and C) in their normal states. Switch A is normally open; Switches B and C are normally closed.

 

When Switch C is opened, an outage is created (indicated by the RO symbol) and the downstream circuit is de-energized. The symbol for Switch C changes from red (closed) to green (open), and a green circle appears around it to indicate that it is abnormally open.

Switch A is closed to re-energize the circuit. The switch symbol changes to red (closed) and a red circle appears around the switch to indicate that it is abnormally closed.

Opening a single phase of the normally closed Switch B, causes the device to go into a partially abnormal state, which is indicated by a yellow switch symbol surrounded by a yellow circle. The state of each phase is indicated by a color block behind the phase name. In this example, the A phase is opened and the switch shows the A with a green (open) background; the B and C phases are closed and have red backgrounds.

The downstream circuit is partially de-energized and a real outage (RO) is created.