C.E. Niehoff & Co. N1610 Troubleshooting Guides - Manual (Page 2)

Page 2 TG61B
Section A: Wiring Diagrams
Figure 2 — N1610-1 Wiring Diagram
Figure 1 — N1610-1 Alternator and Regulator Terminals
AC terminal
IGN terminal

CEN N1610-1 Alternator
Description and Operation
N1610-1 28 V (400 A) alternator with optional 28 V/ 14 V
(50 A maximum on 14 V) 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 activates regulator. Field coil
is then energized.
After engine is running,
N3258 regulator receives ener-
gize signal. Regulator monitors alternator rotation and
provides field current only when it detects alternator
shaft rotating at suitable speed.
After regulator detects alternator rotation, it gradually
applies field current, preventing an abrupt mechanical
load on accessory drive system. The soft start may take
up to 10 seconds at full electrical load.
These regulators used with these units:
• are negative temperature compensated. Setpoints
are 28.0 ± 0.2 V and 14.0 ± 0.2 V at 75F.
• provide overvoltage cutout (OVCO). Regulator will
trip OVCO when system voltage rises above 32 V in
a 28 V system (16 V in a 14 V system) for longer than
2 seconds. OVCO feature detects high voltage and
reacts by signaling relay in field circuit to open,
turning off alternator. Restarting engine resets OVCO
circuit.
• maintain alternator output voltage at regulated
settings as vehicle electrical loads are switched
on and off.
The regulator can be used in single 28 V or dual voltage.
• Allows single-voltage operation (28 V only). 14 V is
not available as a single voltage application with this
regulator.
• Provides optional 28 V/14 V output only from the
regulator when phase cable from alternator is
connected to regulator.

B+ connections on alternator
Both positive cables must be connected together at battery posi-
tive potential when alternator is installed in vehicle and during
operation. Interconnect cable is not part of vehicle cabling.

Interconnect
cable
Positive cables
from vehicle

B– connections on alternator
Both ground cables must be connected together at battery
ground potential when alternator is installed in vehicle and dur-
ing operation. Interconnect cable is not part of vehicle cabling.




14V B+ terminal
