C.E. Niehoff & Co. N1506-1 Troubleshooting Guides - Manual (Page 2)

Page 2
TG0018A
Section 1: Wiring Diagram
CEN N1506-1 Dual Voltage Alternator Description and Operation
N1506-1 100 A (28 /14 V) dual voltage alternator is internally rectified. All windings and current-transmitting
components are non-moving, so there are no brushes or slip rings to wear out. Energize switch (commonly an oil
pressure switch) activates regulator. Field coil is then energized. Upper voltage (28 V) is rectified with standard
diodes. Lower voltage (14V) circuit output current is controlled by SCRs in the drive end housing. Alternator
output current is self-limiting and will not exceed rated capacity of alternator.
N3030 regulator used with these units maintains alternator output voltage at regulated settings as vehicle electri-
cal loads are switched on and off.
Figure 2 — N1506-1 Alternator with Regulator
Figure 1 — N1506-1Alternator and N3030 Regulator Terminals