ac circuits -three- phase wye circuits

wye connected circuit has a phase voltage of 120v, the line voltage is?

(120v)(1.73) = 208v

a wye connected three phase alternator is feeding a wye connected resistive load. The alternator has a line voltage of 480v. the load has 12 ohm of resistance in each phase. what is the phase current in the alternator.

480v/1.73 =277v phase phase v 277/phase 12 ohm =23.08A

a wye connected circuit has a line voltage of 600v. the phase voltage is?

600v/1.73 =347v

three phase voltages are (blank) out of phase with each other

120 degrees

in three phase connection, the voltage measured between the lines is the (blank) voltage

line

in three phase power systems, the delivered power (blank)

never falls to zero

in three phase connection, the voltage measured across a single winding is the (blank) voltage

phase

another name for the three phase wye connection is the (blank) connection

star

line current and phase current are the same in the (blank) configuration?

wye

what are the five advantages of three phase power when compaired to single phase power?

1) never drops below 0 2)always constant power 3)three phase motors are easier to contruct 4)smaller conductors 5)horse power and kilovolt rating are about 150% greater

often in calculations of values in three phase systems, the square root of three occurs, the approximate vale of this constant is?

1.73

the horse power rating of three phase motors and the kilovolt ampere rating of three phase transformers are about (blank) greater than for single ohase motors or transformoers with similar frame size

150%

a wye connected circuit has a line current of 30A. the phase current is ?

30 A

line voltage and phase voltage are the same in (blank) connection

delta