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The PSPICE thyristor library has a triac model. It can be used as a DIAC replacement with respective breakover voltage settings. Onsemi has a SIDAC PSPICE model available.
There's surely no 3-phase transformer model supplied. What level of transformer modelling do you intend, e.g. non-linear core behaviour (losses + saturation)? An exact physical transformer model is somewhat difficult.
With the PSPICE core model, you have at least a good building block for realistic transformer simulations.
O.K: you mean a 3 windings rather than 3 core transformer. There's no visual component, but the basic coupled inductor model allows transformers with arbitrary number of windings, both linear and non-linear. If you like neat transformer symbols for it, you have to draw them yourself.
As long as you are dealing with ideal transformers (K=1), you can simply parallel connect multiple two-windings exemplars in your simulation schematic.
O.K: you mean a 3 windings rather than 3 core transformer. There's no visual component, but the basic coupled inductor model allows transformers with arbitrary number of windings, both linear and non-linear. If you like neat transformer symbols for it, you have to draw them yourself.
As long as you are dealing with ideal transformers (K=1), you can simply parallel connect multiple two-windings exemplars in your simulation schematic.
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