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TG115A
Section A: Description and Operation
Figure 3: C528 Alternator Wiring Diagram
(See model-specific characteristics drawing for detailed notes and information)
C528 Alternator
Description and Operation
The CEN model C528 is a negative ground, pad mount
alternator rated at 28 volts, 175 amps. It is self-rectifying
and brushless, and all windings and current-carrying com-
ponents are stationary, so there are no brushes or slip rings
to wear out.
Charging system can be self-excited when voltage regulator
senses alternator shaft rotation. Regulator can also be ener-
gized if an ignition/energize signal is supplied by the vehicle
to regulator IGN pin, usually via oil pressure switch or multi-
plex system (see page 3 for regulator features).
After the regulator detects shaft rotation (and energize/IGN
signal if applicable), it gradually applies field current, pre
-
venting an abrupt mechanical load on accessory drive
system. Soft start may take up to 20 seconds after rotation/
energize signals are sensed.
A
B
C
D
E
F
Pin A = Not used
Pin B = Phase
Pin C = B ‒
Pin D = B+
Pin E = Alt temp sensor
Pin F = F ‒
Figure 2: Alternator-to-Regulator Harness Plug Sockets
Figure 1: C528 Alternator
B+ Terminal
B‒ Terminal
Regulator
Alternator-to-Regulator
Harness
