In single line diagrams, you can use a compound symbol to show an auxiliary contact next to its associated disconnect equipment item.
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Create a compound symbol that suits your needs, for example a circuit breaker and an auxiliary contact. See Creating and Using Compound Symbols for SLD Diagrams.
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Associate the new compound symbol with the relevant item type in Options Manager. See Create and Use a Compound Symbol.
You can associate just a specific electrical item with a custom symbol and select a compound symbol if you want to use this compound symbol just for that particular electrical item. See Associate Custom Symbols with Plant Items.
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Generate your single line diagram.
The Space heater options on the Related Equipment tab of the Single Line Diagram Options do not apply for electrical items associated with a compound symbol.