Policy MC-517 File 413-018 Page 1 of _____________ Dated Effective 2-28-82_________ Supersedes MC-517 of 9-1-81 Source ________________________ Approved ______________________
Caboose -Electrical System General Operation The caboose electrical system comprises these parts – 1. 2. 3. 4.
Electric storage battery 12 volts Dayco end of axle battery charging drive, with Motorola 120 amp alternator. Electric distribution panel with fuses, circuit breaker and low voltage-no charging timer unit. Lighting fixtures, switches and wiring conduit. Function -
Electric storage battery provides power to burn various lights as need demands. Battery is capable of supplying this power for a given period of time depending on its state of condition. Therefore it is essential the power be restored to the battery at some given time so the battery is able to repeat its delivery of power more than one time. Battery charging system will provide this. When car is moving at some moderate speed the generator will produce power sufficient to carry the car lighting-load and replace power to the battery. In order to conserve battery power when car is standing or when lights have been left on and car is unattended a timer device will shut off all lights except the rear Red light and the conductor's desk light. Function of the timer is nullified when the generator is charging. Included in the timer unit is also a low voltage cut-out. This feature will shut off all lights except the red rear of train light and the desk light when battery voltage falls below 10 volts. Function of the low voltage device is to provide protection to the battery against deep discharge and still allow the rear of train red light to function for an extended period of time. The distribution panel contains a master circuit breaker, circuit fuses, low voltage-timer device, generator charging pilot lite, generator charging fuse and timer reset button. Main circuit breaker has to be in the "On" position for all lighting and generator charging. Each light is controlled by an independent switch except the car body lights (2 lights), these two lights are controlled by one switch. System Voltage Charging system Battery 12 volts Total lighting load Est. normal 10 hour watt load
12 volts DC 14 volts 120 ampere 140 AH rated 301 watts 1200 watts