Corner Tapped Delta

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lowbattery

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Electrical Engineer
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
 
The voltage from any phase to the grounded conductor, Not neutral, but grounded phase conductor is still full system voltage.
 
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
 
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?
 
lowbattery said:
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
Click to expand...
lowbattery said:
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?
Click to expand...
I believe those are two different configurations.
 
lowbattery said:
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?
Click to expand...
You said you have a Wye primary with voltage of VAN, VBN, and VCN. What are the vectors and resultant phasor diagram for the primary voltage VAB?

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?
 
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