VALVE GP-CHECK 2540488 - Caterpillar

Illustration 2 g00866887
Electrical schematic of the N3 series alternator (50 amperes) (1) Diodes for protection against load dumpB- - Frame to battery groundB+ - Alternator to battery positive terminalD+ - Output for the excitation circuit and regulator inputD- - Ground for the alternator and regulatorDF - Alternator output and regulator inputG - Field windingR - Auxiliary terminalU - Stator windingV - Stator windingW - Stator windingNote: The "R" terminal may be used by one of the following components:
Charge indicator
Tachometer
Hour meter
Electronic control moduleIllustrations 1 and 2 show the electrical schematics for the N3 series alternators.The alternator has two circuits: the charging circuit and the excitation circuit. The charging circuit functions during normal operation. The excitation circuit functions during normal operation and during start-up. An independent circuit exists for each phase of the stator. Phases are noted as "U", "V", and "W". The 50 amp alternator has two extra diodes. Diodes are connected to the neutral point of the stator. Diodes also add extra