1. !

2. !

4. VL = VP (delta)

5. IL = √ 3 IP (delta)

6. pen failures in the load elements.
e greatest advantage of the ∆-connected source is its fault toler
f the windings in a ∆-connected three-phase source to fail open
ng load voltage or current!
120 V ! 0o 120 V
+ -
+
winding 120 V 120 V 120 V
failed open! ! 120o
-
Even with a source winding failure, the line voltage is still 120 V,
120 V. The only difference is extra current in the remaining fu