
47Models of Power Circuit Devices
The pictures of the three-phase transformers are given in Figure 2.33. Three-Phase
Transformer 12 Terminals consist of three single-phase two-winding transform-
ers, and all 12 terminals are accessible. The block Three-Phase Transformer (Two
Windings) models the three-phase transformer, using three single-phase ones. It is
possible to simulate saturation and hysteresis. Each of the windings can be connected
as Y (oating neutral), Yn (accessible neutral), Yg (grounded neutral), D1(Dlags Y
by 30°), and D11 (D leads Y by 30°). The block picture changes for each variant. The
dialog box has three pages; the r