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DOE-HDBK-1016/1-93
ELECTRICAL DIAGRAMS AND SCHEMATICS
Electrical Diagrams and Schematics
When fuses, breakers, or switches are used in three-phase systems, the three-phase symbol
combines the single-phase symbol in triplicate as shown in Figure 6. Also shown is the symbol
for a removable breaker, which is a standard breaker symbol placed between a set of chevrons.
The chevrons represent the point at which the breaker disconnects from the circuit when
removed.
Figure 6 Three-phase and Removable Breaker Symbols
Relays, Contacts, Connectors, Lines, Resistors,
and Miscellaneous Electrical Components
Figure 7 shows the common symbols for relays, contacts, connectors, lines, resistors, and other
miscellaneous electrical components.
PR-03
Rev. 0
Page 6
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