ABYC AEMC Chapter 3 Three Phase with Complete Solutions!

Compared to traditional US power sources, _____ delivers three times the power with only 1.5 times the conductor material. - ANSWER-three-phase power In a delta configuration, the phase voltage is _____ the line voltage - ANSWER-equal to Three-phase power ______ than single-phase power - ANSWER-is more efficient Proper overcurrent protection for a three-phase motor requires - ANSWER-a triple-pole breaker Three-phase induction motors can be damaged by ____ in a three-phase power distribution system. - ANSWER-loss of voltage In the SO-Hertz world, the Three-Phase _(___) configuration is by far the most frequently used. - ANSWER-wye Three-Phase is a more efficient use of conductors. Given the same peak voltage between conductors and same current in each conductor, three-phase delivers three times the power with only ___ times the conductor material (three wires instead of two). - ANSWER-1.5 Normally, the loads are unbalanced in a ______ configuration with a neutral cable connected at that center point where the three phases meet to supply the line to neutral loads. - ANSWER-wye(Y) Notice that for 208-volt three-phase wye(Y), all three line conductors exhibit ___ volts to neutral. - ANSWER-120 The delta configuration has the three phases connected in a triangular configuration. They don't normally have a_______ cable. - ANSWER-neutral In the delta configuration, the phase voltage is ___ to theline voltage. - ANSWER-equal A wye configuration, the phase voltage is the _________ divided by root 3 (sqrt(3) = 1. 732). - ANSWER-line voltage A delta configuration does a great job at suppressing _____________, as well as maintaining balanced voltages when load currents are severely unbalanced while using