Delta
What is a Delta Connection
A circuit formed by connecting three electric devices in services to form a closed loop.
What is a Wye connection
A connection of three components made in such a manner that one end of each component is connected.
How do you find the current flow of the secondary in a transformer
I=E/Z
What is a Diametrical Connection
A three-phase transformer connection that can provide a six-phase output
What is excitation current
Amount of current required to magnetize of the core.
What symbol is used for the delta configuration
a TRIANGLE
What is the other term for wye
Star
If you have a Primary of 120V and a Secondary of 30V in a transformer what is your ratio
What is orange wire
A method of color coding the high leg connections of some three-phase power system.
What is Flux Leakage
The magnetic flux which does not follow the particularly intended path in a magnetic circuit
What would the Voltage be in the primary if the line is 500v
500v
If a wye has a Primary voltage of 120v what is the Line voltage
207.84v
If you have a ratio of 3:1 what is your voltage for the secondary if your primary is 277V
92.33V
what is Three-Phase VAR's
Reactive Power in a three phase circuit
Correcting the power factor of three-phase loads normally involves adding what
Capacitance in parallel
What stays the same and differs in a Delta calculation
Volts stay the same and Amps differ
What stays the same and differs in the calculations of a wye connection.
Volts differ and Amps stay the same
Delta Wye
Ep= Ep=120v Z=3
El= El=
Ip= Ip=
Il= Il=
Ep=207.84v Ep=120v
El=207.84v El=207.84v
Ip=23.09A Ip=40A
Il=40A Il=40A
What is a Three-Phase Bank
Single-Phase Transformers connected in such a way as to operate on a Three-Phase system
In a three-phase power system,the delivered power what
Never falls to zero
What is this calculation used for VA=1.732xElxIl
Line values of voltamps
What is this formula used for VA=3xEpxEl
Phase values of voltamps
A delta connected set of windings has a phase voltage of 480v. what is the value of line voltage
480v
What is tagging
What unit of measurement do you use when the power calculated in a three phase load is purely reactive