SPECIAL
UTILITY
SECTION
This section applies specifically to the Utility Truck
models of the LK Series generating sets. These
supplementary instructions are to be used, where
they apply, instead of the instructions forthe standard
generating sets.
For instructions not covered in this section, refer to
the appropriate section for the standard sets.
The utility set is designed to supply 12 Volt DC output
for radio; etc., while the truck is stopped at a service
job.
At the same time, AC power is available for flood
lights,
power tools, etc. Thus, the generating set
eliminates the necessity of running the truck engine
to prevent battery run down at a service job. The
generating set can also be used to recharge a low
truck battery if AC power requirements^re sufficient-
ly reduced. In normal operation, .th'e set supplies DC
and AC current for the
load,
but does not recharge the
battery. /
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RATED OUTPUT ^C/fe
Alternating currentand directcurrentare produced at
the same time. {
Combined AC and DC rated output 2,500 Watts
Maximum DC amperes
(automatically limited) 30 Amps
Maximum DC watts (maximum
30 amps x nominal 13 volts) 390 Watts
Available AC output (2500 watts less
watts of DC charging current)
Minimum (while full load DC
connected - truck stopped) 2110 Watts
Maximum (while truck running or
battery charged and no DC
load connected) 2,500 Watts
Open circuit DC voltage
(12 volt battery charging) 15 Volts
Nominal AC voltage
(power for tools, etc.) 120 Volts
Too high a voltage will overcharge and
possibly damage the battery. Adjust the
governor only to correct the DC voltage output of the generator at
operating temperature. If a carburetor adjustment is made, check
• the governor adjustment also.
Do not become alarmed if the ammeter reads 45 amperes when first
starting the set. After a few minutes the current will come down to
normal as the generator warms up and the battery voltage comes
up.
Consistently high charge rate (after warm up) could be due to a
poor battery in the truck or running the set too fast.
Vacu-Flo cooling and remote control starting and
stopping make the setsuitableforinstallatioriin small
compartments.
CHARGE RATE
Rated DC output is 30 amperes. A circuit breaker
opens the charge circuit to protect the generator if DC
\ output is high. Equal time is consumed by the breaker
\ to cut-in and cut-out and it may go through this cycle
/several times, each succeeding cycle becoming more
' rapid, until it acts and sounds like a buzzer, during an
overload on the DC output. Generally, the battery will
/ warm up and the charge rate will drop so that the
i breaker will not reach the buzzing stage. •
As the battery reaches a charge condition, its terminal
L£voltage approaches that of the generating set,
resulting in a desirable tapering off charge rate. After
the battery becomes fully charged, the charge rate
equals the DC load (radio, lights, etc.) connected.
The set's charge ammeter reads zero while the truck's
engine is running.
AC
OVERLOADING
It is not expected that men on the job will determine
available load each time before plugging in tools, etc.
Overloading is apt to occur especially during night
work when both lights and tools are used. If the set
speed drops, AC lights will dim, and part of the load
must be disconnected. If more AC power is required,
simply run the truck's motor to take over the DC load
for that interval, and make the full rating available in
AC output.
A short circuit across the AC terminals will collapse
the field to protect the generator.
19
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