regulator relay as well as a voltage regulator relay, such as shown in foldout 2.
Please note that the line switch here is called a circuit breaker.
(1) Here the current regulator controls the amount of current going
through the fields by adding resistance to the field windings. When the current
output of the generator starts to go too high, the current regulator puts
resistance into the field circuit. This resistance may be put into and taken out
of the generator field circuit as many as 200 times a second. The result is that
the average of this resistance will limit the current to a safe value and keep the
generator from destroying itself.
(2) The third unit is the voltage regulator. It operates much like the
current regulator, except that it senses voltage instead of current and limits the
generator's voltage to a safe value. This protects the battery and other
electrical components from a voltage high enough to damage them.
(3) The circuit breaker (also called cutout relay and reverse current
relay) acts as an automatic switch that completes the circuit from the generator to
the battery when the generator is charging, and opens the circuit when it is not.
This last action prevents the battery from discharging through the generator when
the generator is not charging.
3. CARBON PILE REGULATOR. This regulator consists primarily of a voltage
regulator assembly, adjustable resistor assembly, load relay assembly, and
capacitor assembly (fig 6 and 7).
Figure 6.
Carbon pile regulator.
a. The voltage regulator assembly contains a carbon pile whose electrical
resistance varies inversely with the physical pressure on the ends of the pile. In
other words, as pressures on the ends of the pile increase, resistance decreases;
and as pressure is decreased, resistance increases. Since the field current for
the generator flows through the carbon pile, the resistance of the pile will
control the output voltage.
(1) A spring adjusted armature presses against one end of the carbon
pile and tends to compress it to its minimum resistance. At the end of the carbon
pile is a contact screw which is used to adjust the minimum resistance.
0S 010, 5-P6
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