Lombardini CHD series - Electric System Overview; Alternator type Marelli AA 125 R 14 V 45 A; Characteristic curves for alternator type Marelli AA 125 R 14 V 45 A; Characteristic voltage curve for regulator type RTT 119 AC

- 73 - Workshop Manual LDW CHD _ cod. 1.5302.345 - 6° ed_rev. 05
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Alternator type Marelli AA 125 R 14V 45A
Characteristics:
Rated voltage ............................14V
Rated current .............................45A
Max. speed ................................14000 giri/1'
Peak speed (max 15 min)..........15000 rpm
Bearing on control side ..............6203.2z
Bearing on manifold side ...........6201-2z/C3
Voltage regulator .......................RTT 119 AC
RH direction of rotation.
 Tighten the nut 1 to 60 Nm.
Note: Lube the two bearings with high temperature grease.
The alternator has a W terminal for a speed indicator.
Characteristic voltage curve for regulator type RTT 119 AC
The electronic voltage regulator is built into the alternator.
The curve changes depending on temperature.
A = Max. voltage curve
B = Min. voltage curve
Characteristic curves for alternator type Marelli AA 125 R
14V 45A
The curves have been detected with electronic voltage regulator
after thermal stabilization at 25°C; test voltage 13.5 V.
P1 = Power in kW
I = Current in Ampere
η =Alternatorefciency
Note: The alternator rpm is equal to to the rpm shown in the
table multiplied by 1000.
Ratio between engine/alternator rpm = 1:1.8
ELECTRIC SYSTEM