TM
11-6130-243-14-2
FUNCTIONING OF EQUIPMENT
through the jumpers to each parallel-connected
pair of primary windings in each leg of the wye.
a. The power supply is designed to operate
from either 220- or 440-volt, 60-Hz, 3-phase
power mains. Jumpers are used to provide for
correct connection of the power mains to the
The output circuit includes the secondary wind-
ings of power transformer T1, diode rectifiers
T1. Figures 4-1 and 4-2 are simplified sche-
CR1 through CR6, rectifier assembly CR7, cap-
matic diagrams that show how the primary
acitors C1 and C2, load resistor R2 and filter
windings are wye-connected to the power mains,
r e a c t o r L1. Secondary windings of T1 are
Refer to the complete schematic diagram (fig.
connected in a delta configuration as shown in
FO-2) while studying the two simplified sche-
matic diagrams.
alternating current (ac) output voltage from
b. When the power supply is arranged to op-
the secondary windings of T1 is converted to a
erate with 220-volt input power, jumpers are
pulsating direct current (dc) voltage by full-
connected between specific terminals as shown
wave rectifiers CR1 through CR6. Rectifier as-
sembly CR7 suppresses transients in the input
and output lines thus protecting diode rectifiers
parallel-connected into a wye configuration,
CR1 through CR6. The dc pulses are applied
to filter reactor L1, load resistor R2, and filter
switch (CB1) is at ON, input power is routed
capacitors C1 and C2. Resistor R2 serves a
from the C terminals of the circuit breakers