To start a three-phase motor, three switches (A, B and C) are
required in such a way that its operation occurs only under the
following conditions: • When closed only B • When closed only C •
When A and B are simultaneously closed and C is not closed • When A
and C are simultaneously closed and B is not closed
In a three-phase circuit the balanced delta load of (36 +j54)
ohms is fed by impedance conductors (5 +j70) ohms. If the generator
voltage is 120 V angle 0° phase A, calculate a) the bc voltage on
the load, b) the powers in the conductors, c) the bc voltage of the
delta load and d) the power delta on the load.