TB 65 VEHICLE BATTERY SYSTEMS Flashcards
TB 65 VEHICLE BATTERY SYSTEMS
This system has been installed in all heavy apparatus and consists of six (two sets of three), lead acid 12 volt batteries.
These batteries are rated at 950 cold crank amperes at 0 degrees F.; they have a reserve capacity of 190 minutes at 25 amperes draw per hour.
Diesel engines draw approximately two amperes per cubic inch when starting
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TB 65 VEHICLE BATTERY SYSTEMS
The batteries are connected in parallel to the rest of the electrical system.
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TB 65 VEHICLE BATTERY SYSTEMS
Five of the six
batteries are used to start the apparatus. The sixth battery (right rear) is not connected to the starting circuit and is strictly used to keep the 800 MHz Radio, the UHF and VHF Radio and the MDT powered at all times.
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TB 65 VEHICLE BATTERY SYSTEMS
The combined use of the 800 MHz Radio, the UHF and VHF Radio, and the MDT units, causes a constant ____ amperes per hour draw on the battery system.
Due to this constant drain, an automatic onboard (40 amp) battery charger has been installed on each apparatus. This charger is connected to the “engine block” heater receptacle (110 volt shore power). Heavy apparatus must be plugged in when the vehicle, is in quarters.
8
TB 65 VEHICLE BATTERY SYSTEMS
When the apparatus is out of service for an extended period of time (over ____ hours or the on-board battery charger cannot be plugged in, the radio “cut off switch” must be turned off to avoid running down the batteries. This switch is located inside the radio compartment.
ten
TB 65 VEHICLE BATTERY SYSTEMS
All apparatus have been installed with a “low voltage warning system.” An audible warning device activates anytime the batteries fall below ____ volts.
12.2
TB 65 VEHICLE BATTERY SYSTEMS
This voltmeter should be monitored to insure that a minimum of 12.2 volts are available from the batteries at all times.
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