b. During local operation, the power supply is
(1) Ac input voltage
115/230 volts 10%
connected directly to the load through the dc power cord.
50, 60, or 400 Hz
If the load must be connected to the power supply at a
remote point, a four-conductor cable makes it possible to
(3) Dc output voltage
obtain regulated dc power of 24 to 29 volts at the remote
(a) Local load
24.0 to 32.0 volts at
load terminals. The remote load may be placed up to a
distance of 25 feet from the power supply.
(b) Remote load
24.0 to 29.0 volts at
c. If a failure or undervoltage condition should
(4) Dc output current
25 amperes maximum
occur in the ac power source, the power supply is
(5) Ripple (Rms voltage) Less than 0.5%
capable of transferring the load to an external battery.
(6) Ambient temperature
The only limitations affecting battery-supplied power are
-40F to +150 F
the absence of voltage regulation and the lack of
(-40C to +66'C)
complete circuit protection. Circuit protection available
in this case is limited to the dc circuit breaker located on
b. Weight and Dimensions
the front panel.
(a) Unpacked ............94 pounds
1-5. Technical Characteristics
(b) Packed................120 pounds
(2) PP-6224/U Dimensions:
a. Electrical Characteristics
(a) Depth..................16 inches
(b) Width ..................16 inches
(c) Height .................7 inches
National stoc k
Power Supply PP-6224/U
Power Supply PP-6224A/U
Cable Assembly, Power
Cable Assembly, Power
The power supply is housed in a watertight case. Circuit
a. Twenty five feet in length, 4-conductor cable
beakers to protect the power supply during overloads
assembly required to connect the power supply to a set
are mounted on the front panel.
of remote load terminals.
voltmeter-ammeter enables the operator to monitor
either output voltage or output current, All controls and
b. Cable assembly required to connect the power
supply to the external battery.
Receptacles 37 DC OUT, J8 BAT, IN, and J9 DC OUT
1-9. Differences in Models
are mounted on the rear panel. Ac and dc power cords
furnished with the power supply are illustrated in
Differences between Power Supplies PP-6224/U and
PP-6224A/U are the result of certain EMI improvements
which have been incorporated into the PP-6224A/U.
Unless otherwise indicated, all information provided for
1-8. Auxiliary Cable Assemblies
PP-6224/U is also applicable to PP-6224A/U.
Cable assemblies required but not supplied with the
power supply are as follows:
1-2 Change 3