Description & Operation: Generator

The Delco-Remy CS charging system has several models available, including CS-128D. The number denotes outer diameter, in millimeters, of stator lamination. CS generators are equipped with internal regulators. Unlike three-wire generators, CS-128D may be used with only two connections: battery positive and an "L" terminal to charge indicator lamp.

As with other charging systems, charge indicator lamp lights when ignition is turned to RUN position position, and goes out when engine is running. If charge indicator is ON with engine running, a charging system defect is indicated. The indicator light will glow at full brilliance for several kinds of defects, as well as when system voltage is too high or too low. The regulator voltage setting varies with temperature and limits system voltage by controlling rotor field current.

Achieve correct average field current for proper system voltage control by varying on-off time. At high speeds, on-time may be 10 percent and off-time 90 percent. At low speeds, with high electrical loads, on-time may be 90 percent and off-time 10 percent.