Generator Fiat Dc 115/24/7/3 C - Specifications - Fiat 411 R Service Manual

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Therefore, if required by the equipment inserted in the system, the generator may be overcharged without
any damage to windings: in tact, they are at ambient temperature at the start of operation and therefore
are not yet thermally stabilized.
When, after 20-30 minutes of functioning, due to ohmic resistance, the group and generator become
stabilized, the current regutator reduces the current to a vaiue continuously possibte.
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The temporary overcharged operation of the genera-.or, allows a quic -r artery rec arge, especially if
its charge level is tow, due to repeated and cold startings.
The timiting current is a function of the surrounding temperature; and therefore during the summer the
limiting current will be Jess than during the Winter, and the generator temperatures during the various
seasons are more uniform.
Checking the generator: troubles and re-
medias.
Consult diagrams of Figs. 129-131432 for the
generator checks, and for the coit check the
Figs. 133-134-135. l
Tests to be carried out as for generator type
'r'E'l15~14t3;'24-1680 Var. 2. For specifications, see
tabie on page B9.
Plotting the output curve (Fig. 137), requires the
previous inspection of the brushes, that should
be completely seated upon the commutator, which
takes place after ten hours of operation, with a
current output of 7 A at 2900 R.P.i\/l.
See page 85 for the generator trouble ~ shooting
and repairs.
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Fig. 13?. ~ Output curve of generator type lJC1t5,.'.'z'r1,'1_/3 C.
{Beginning of battery charging, at 24 V. T550-1650 R.P,M.3.
GENERATOR FIAT DC 115_."24,1?;'3 C - SPECWICATIONS
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Items ' Values
-...
condition-run duration 30 minutes) . . . . . . . _ . .
l Heating test . . . . . . . . . . . . . . . . . . . . . . .
-- Fteld-coils (between terminal 67 and ground
— Armature
Cammutato: bar maxrmum aliow-d out of-round
E'-rush end play with f19SP€Ct to holders)
i Pressure by springs on brushes (new)
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i Operational test as motor . . . . . . . . . . . . . . . .
Running generator before piotting or' A]r.p.m. curve {hot
Diameter between pole shoes middle tine . . . . . . . .
t Air gap . . . . . . . . . . . . . . . . . . , . . . . . .
Tightening torque of drive pulley nut . . . . . . . . . .
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— — 7' A__-. i _____ __**_ !______i;_ —_—__ *7 - — — __ —-—— _ W ; _ i ..__ __ _ _ _ _
Speed . . . . . . . . . . . . . . . . . 1170-1330 r.p.m.
Voltage . . . . . . . . . . . . . . . . . 24 V
Current . . . . . . . . . . . . . . . . . 4,5-6,5 A
Speed . . . . . . . . . . . . . . . . .
Voitage . . . . . . . . . . . . . . . . . 28 V
Current . . . . . . . . . . . . . . . . . 6.75-7.25 A
. ' 5 of 45 min. at 2300 r.p.rn.
Rmmmg ' ' ' ' ' ' ' ' ' ' ' Z of15 min. at 5800 r.p,m.
Output current . . . . . . . . . . . . . 5,75-7.25 A
Voltage . . . . . . . . . . . . . . . . . 23 V
Commutator temperature, not more than . 90° C (1940 F)
Casing temperature, not more than . . . 60°C 840° F)
15 5-159 Ohm
030 O32 Ohm
001 mm (0 oooae)
or 04 mm recess"-<1 0157)
o.ee~o 75 kg (152-1 67 lb)
ro,rs-10.15 mm (2.*17s"-2.135")
o,a-0,45 mm (o.o11a"~o.ot1r")
1 kgm (50.6 ft.ib.)
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Resistance at 20° C [63° F) ohm: ,
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I A 1 » A v » - - 1 I ' ' 1 -
2900 r.o.m.
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