C.E. Niehoff & Co. C524 Troubleshooting Guides - Manual (Page 2)

Page 2
TG0060A
Section A: Wiring Diagram
CEN C524 Alternator Description and
Operation
C524 14 V (300 A) 3-phase alternator is externally
energized and self-rectifying. All windings and
current-conducting components are non-moving, so
there are no brushes or slip rings to wear out.
After engine is running, regulator receives energize
signal. Regulator monitors alternator rotation and
provides field current only when it detects alternator
shaft rotating at or above idle speed.
After regulator detects alternator rotation, it gradually
applies field current, preventing an abrupt mechani-
cal load on accessory drive system. The soft start may
take up to 20 seconds.
A2-334 and A2-335 regulators used with some of
these units are flat temperature compensated. A 15.5
V regulator setpoint is available for battery isolator
applications. Both regulators have a P terminal to
provide an optional AC voltage tap.
Figure 3 — C524 Alternator with Regulator
Figure 1 — C524 Alternator/A2-334 Regulator Features
B+
terminal

IGN terminal

Figure 2 — A2-335 Remote-mounted Regulator Features

LED

IGN terminal

LED

P terminal

Regulator
receptacle
IGN
P
Not used
P
terminal
