TM 11-6130-243-12
terminals to their associated C terminals.
power source, connect six jumper leads on the tap board
Note. The ac power input electrical connections are made by
as follows:
authorized installation personnel and should be protected with a
(1) Jumper leads from each of the three S
fuse and controlled by an external switch for convenient removal
terminals to their associated L1 440V, L2
of power from the power supply during maintenance.
440V, and L3 440V terminals.
c. Connect the four-wire ac input power cable to the
(2) Jumper leads from each of the three 5
ac power input source.
Section II. OPERATION
2-4. Controls and lndicators
2-5. Operating Procedure
The following chart lists the power supply controls
After performing the input power connection pro-
and indicators and their functions:
cedures given in paragraph 2-3, proceed as follows:
a. Set the VOLTAGE ADJUST switch to NOM.
b. Connect the dc output cable to the equipment to
Function
Control or indicator
be powered.
Turns power supply on and off
POWER ON circuit breaker
c. Set the POWER ON circuit breaker switch to
manually. Provides overload
switch.
ON.
protection by automatically dis-
d. Check to see that the DIRECT CURRENT
connecting ac input power
whenever input current is exces-
VOLTS meter indicates 28 volts. lf the voltage indicated
sive.
is less than 28 volts, set the VOLTAGE ADJUST switch
When illuminated, indicates that
Indicator lamp.
to HIGH. If the voltage indicated is greater than 28
input power is applied to power
volts, set the VOLTAGE ADJUST switch to LOW.
supply.
e. Depress the AMMETER switch to READ and see
VOLTAGE ADJUST switch
Permits adjustment of output
voltage if input voltage is high
(3-position rotary).
that the DIRECT CURRENT AMPERES meter
or low.
indicates output current (200 amperes maximum).
Position
Action
LOW
Lowers output
voltage.
Provides nom-
NOM
inal dc output
of 28 volts.
Raises output
HIGH
2-6. Stopping Procedure
voltage.
Stop the power supply as follows:
AMMETER switch (2-posi-
W h e n depressed, DIRECT
tion, spring-loaded).
CURRENT AMPERES meter
a. Set the equipment being powered to off.
indicates power supply output
b. Set the POWER ON circuit breaker switch to the
current.
off (down) position.
DIRECT CURRENT
Indicates output voltage.
c. Disconnect the dc output cable from the equip-
VOLTS meter.
ment being powered and rewind the dc output cable on
DIRECT CURRENT
Indicates output current.
AMPERES meter.
the brackets on the front of the power supply.
2-4
Change 2
