If the generator is charge indicator equipped, the charge indicator goes on when the switch is closed. The indicator goes off when the engine is running. If the charge indicator is on with the engine running, the battery may be under- or overcharged.

If the generator is voltmeter equipped, the voltmeter reads battery voltage when the engine is not running, and reads charging system voltage when the engine is running. The normal indication is 11-16 Volts.

The regulator limits system voltage by controlling rotor field current. The rotor current is switched on and off at a fixed frequency of about 400 cycles per second. This controls radio noise. By varying the overall on-off time, the correct average field current for the proper system voltage can be obtained. At high speeds, the on time may be 10% and the off time 90%. At low speeds, on time may be 90% with off time 10%. The regulator voltage also varies with the system temperature.

The generator does not require lubrication. The rotor shaft is mounted on ball bearings at the slip ring end. Each contains a permanent grease supply.

Generator Description and Operation L36

The CS-130D generator is equipped with the following components:

1. A built in voltage regulator with fault detection
2. A stator
3. A rectifier bridge
4. A rotor with slips rings and brushes
5. A conventional pulley
6. Dual internal cooling fans

The fans function to cool the following components:

1. The slip ring end frame
2. The rectifier bridge
3. The voltage regulator

Only two generator connections are used: the battery positive L terminal and the ground path through the generator bracket. Use of the P, I, and S terminals is optional. The P terminal is connected to the stator. The P terminal can be connected to an outside tachometer or other device. The I terminal can be connected directly to battery voltage to power the generator instead of, or in addition to, the L terminal which must be stepped down. The S terminal can be connected to an outside voltage source such as voltage near the battery for voltage control. If the S terminal is not used, internal generator voltage is used for control.

The voltmeter reads voltage when the engine is not running, and reads charging system voltage when the engine is running. Normal voltage is 10-16 volts. The voltage regulator setting varies with temperature and limits system voltage by controlling the rotor field current. The voltage regulator switches rotor field current on and off at a frequency of about 400 cycles per second. This helps control radio noise. By varying the overall on-off time, correct average field current for proper system voltage control can be obtained. At higher speeds, the on time may be 10 percent and the off time 90 percent. At low speeds, with high electrical loads, the on time may be 90 percent and the off time 10 percent.