Corner Tapped Delta

[lowbattery]

Hi, can you please help me understand the Corner tapped delta and its phasor diagram? I'm having trouble understanding the power delivered if let's say only the V(ac) - Line to Line Voltage supplies a load and if only the V(ab) - Line to Ground where the "b" is grounded. Thank you for your help

 

[jim dungar]

Ground is simply a reference/common point. It does not change the Line-Line voltage vectors at all.

 

[Dsg319]

The voltage from any phase to the grounded conductor, Not neutral, but grounded phase conductor is still full system voltage.

 

[don_resqcapt19]

Assuming a 480 volt system the voltages would be as shown below. The loads only see the phase to phase voltages so having one phase with zero volts to ground does not cause issues for most loads. Some VFDs and similar equipment do not play well with corner grounded systems.
A-B = 480
B-C= 480
A-C = 480
A-gnd =480
B-gnd = 0
C-gnd = 480

 

[lowbattery]

Hi, Thank you for your inputs. Sorry for the basic questions. In a wye (primary) - center tapped delta (secondary) the line to line current and phase current is lagging by 30 degrees, what about their voltages? What is their phasor diagram placement?

 

[oldsparky52]

Hi, can you please help me understand the Corner tapped delta and its phasor diagram? I'm having trouble understanding the power delivered if let's say only the V(ac) - Line to Line Voltage supplies a load and if only the V(ab) - Line to Ground where the "b" is grounded. Thank you for your help

Hi, Thank you for your inputs. Sorry for the basic questions. In a wye (primary) - center tapped delta (secondary) the line to line current and phase current is lagging by 30 degrees, what about their voltages? What is their phasor diagram placement?

I believe those are two different configurations.

 

[jim dungar]

Hi, Thank you for your inputs. Sorry for the basic questions. In a wye (primary) - center tapped delta (secondary) the line to line current and phase current is lagging by 30 degrees, what about their voltages? What is their phasor diagram placement?

You said you have a Wye primary with voltage of V_AN, V_BN, and V_CN. What are the vectors and resultant phasor diagram for the primary voltage V_AB?

A transformer does not change the phase relationship between voltage and current.

As oldsparky52 said, you have mentioned two different secondary winding configurations. Which one do you have?