This type of 3-phase connection has one end of each coil connected together and the other end of each coil left open for external connections.
Transformer Connections II

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Professional Development
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1.
FLASHCARD QUESTION
Front
Back
Wye
2.
FLASHCARD QUESTION
Front
This type of 3-phase connection has the wire from the ends of each coil connected end-to-end to form a closed loop.
Back
Delta
3.
FLASHCARD QUESTION
Front
Nominal voltage is the designed voltage level, not the actual voltage measured at the installation. True or False?
Back
True
4.
FLASHCARD QUESTION
Front
With regard to current values in delta systems, these two currents flowing through the windings are how many degrees out of phase?
Back
120
5.
FLASHCARD QUESTION
Front
The delta wiring configuration places each winding across the phase to phase source voltage, therefore, the voltage across the winding will equal what value?
Back
Line voltage
6.
FLASHCARD QUESTION
Front
How can you calculate Line voltage when two windings, attached at a common point, are connected to two separate phase line sources and are 120 degrees out of phase with each other?
Back
Line voltage equals winding voltage X 1.732
7.
FLASHCARD QUESTION
Front
When the power supply is 60 Hz AC, the second harmonic of the fundamental harmonic are what value?
Back
120 Hz
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