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tion mode and remain there until current drops below 5-15 % of capacity or until the
time-out circuit cycle is complete.
B) Constant Versus Occasional Use
In general, it is recommended that the charger be left connected continuously to the a.c.
distribution system so that it will be in operation whenever a.c. is available. This will main-
tain batteries at peak voltage and will automatically compensate for the natural self-dis-
charge of the battery system. When a load is applied to the battery system the charger's
output will automatically increase to supply the current which would otherwise draw battery
voltage down. Repeatedly allowing batteries to become completely discharged before
recharging will greatly shorten their life. Leaving the charger on continuously will
prevent this.
While the output regulation of the charger will minimize battery gassing and water loss,
monthly checks of the electrolyte level (for wet lead acid batteries) are still strongly recom-
mended. Some water loss is an inevitable aspect of the charging process, and maintaining
the correct electrolyte level in your batteries is the most important thing you can do to as-
sure their maximum performance and long life.
C) Proper Load Sizing
The Phase Three Charger is rated for continuous duty. (Refer to Specifications section for
continuous duty ratings at 115V and 230V.) While the charger cannot be damaged by over-
loads that exceed this continuous rating, excessive load demands may draw battery voltage
down faster than the charger can resupply it. If battery voltage continues to drop and the
output current is at maximum while the charger is in service, check to see that your average
d.c. loads are not exceeding the charger's rated output. If they are, you may wish to consider
adding another charger in parallel to provide sufficient power for your requirements. (See
section III-E, Multiple Unit Parallel Wiring.)
D) Operation With Engine
It is perfectly acceptable to allow the charger to remain on when the engine is started and
while it is running. The current limit feature of the Phase Three Charger will protect against
any damage due to the high current demands of engine cranking. Output diodes will prevent
any back-feed of current into the charger from the alternator while the engine runs.
As the alternator starts to charge the battery, the charger output will decrease. When the
battery voltage exceeds the rated output voltage of the charger it will shut off and stay off as
long as the batteries are in this high state of charge. If the battery voltage should drop below
the charger's rated output voltage it will automatically return to service.
E) Operation as a d.c. Power Supply (stand-alone d.c. power source) or Radar Rectifier
Most battery chargers are not suitable for powering electonic devices directly, without a
battery attached to the output, as the high ripple and pulsing d.c output ( i.e., rectified a.c.
output) can interfere with the operation of the device. However, this charger employs a cir-
18
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Phone: 714-751-0488 Fax: 714-957-1621
E-Mail: sales@newmarpower.com
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