Page 298 - Solutions Manual to accompany Electric Machinery Fundamentals
P. 298

Thus the line voltage  lags the corresponding phase voltage  by  30.  The phasor diagram for this
                 connection is shown below.


                                                         V
                                                          bc
                                                 V bn



                                                                 V an




                                                                      V
                                                 V                      ab
                                                  cn



          A-5.   Find the magnitudes and angles of each line and phase voltage and current on the load shown in Figure
                 P2-3.









































                 SOLUTION  Note that because this load is -connected, the line and phase voltages are identical.
                                                                
                                                                        
                                                             
                                             
                                          
                                                                     
                                                 
                             V   V   V  120 0  V   120     120  V 208 30  V
                          ab   an   bn
                                                                    
                                                                
                                                    
                                                 
                                                                              
                             V   V   V  120     120  V   120     240  V 208     90  V
                          bc   bn   cn
                                                                         
                                                                     
                                                          
                                                     
                                                 
                                                                
                                                             
                            V    V  V  120     240  V   120 0  V 208 150  V
                          ca   cn   an
                                                           292
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