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

GENERATOR TYPE DC 'l'§5/'24,"7;'3 C
Witt': -El i » mm' {O-Q it M)
Specifications.
The generator type DQ115124/7;'3 C, illustrated in Fig. 136, has been mounted beginning from engine
No. 005045; its specifications are:
Voltage . . . . . . . . . . . . . . , , . . . . . , . . . . . . . . . 24 V
Maximum continuous current (ampere - limited) . . . . . . . . . . . . . . 'I A
Maximum current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8,5 A
. . . . . . . . . . . . . . . . . . . . 195 W
233 W
Maximum continuous power . . . .
Maximum power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cut-in speed, 24 V, 26°C (68° F) . . . . . . . . . . . . , . . . . . . . . . . . 1550 to 1550 R.P.l\fi.
Speed of maximum continuous current, 'FA, 26°C (68° F) . . . . . . . W25 to 'lB'i£i R.P.Ni.
Speed of maximum current, 8,5 A at 20°C (68° F) . . . . . . . . . . . . '£776 to i930 R.P.iii'l.
58% R.?.M.
Rotation (trorn drive side} . . . . . . . . . . . . . . . . . . . . . . . . . . . ciockvrrise
shunt
i A""'-$46124
Regulator group . . . . . . . . . . . . . . i . . . . . . . . . . . . . . . . . type ; ';P1,.24!7
Maximum continuous speed . . . . . . . . . . . . . . . . . . . . . . . . . .
Excitation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . _ . .
Main features of this generator compared with the preceding one are: completely enclosed, more power,
reaction type brushes.
Reaction brushes are advantageous as vibrations against the brush-hoiclers are reduced, compared to
the radial type. .
For equal brush sections they allow a larger contact surface on the commutator, thus reducing both
sparkling and temperature: the excitation current also ls reduced, and the regulator group contacts,
voltage and current regulators have longer life.
When the generator is coupled to regulator group GP 1,-'24,|'7, starting (cold), it may generate a current
greater than the maximum one; but it is reduced when the internal continuous running temperature has
reached appropriate levels {thermal equilibrium), without any damages to the components.
The feature is due to the current regulator, which, as explained when describing the regulator group, is
thermostabilized.
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Fig. 136. - Longitudinal and cross section of generator type DC 'H5124/"7,'3 C.
Note: A bracket is fastened by screws (hot represented in the figure) to the generator frame. Bracket must be required separately.
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