Control Box Mod. Gp1/24/7 - Fiat 411 R Service Manual

465'b'885
cortTRor_ BOX rnoo. on-r/24/7 (PadNo.
Description.
The Control Box Mod. GP 'i/24/7 is composed E:-y three units: cut-out relay, current regulator and voltage
regulator.
Both the voltage and the current regulators (Fig. 149) consist of a U—shaped body with a bend on the
and oi one arm and a tongue (5) on the other. An armature (2) supported by a tension spring (1) is
fastened to the body (9). The spring is made of two blades lying flat on each other, one of steel and the
other bi-metallic.
51 fin"g;x»;' hi.»-.~;4i,§ , -1 L ; ;-. :\»\-;\- .- . V, . ,. ;. »..' .~.
'......= Q; Q -~ - ill; .'
'\'$E?~'- L _ nan."-£*=—-' ' ' i' Q)
-'-'-"' _-' "----*w----~'~'-— I» '_
Q" .3? i
.. .. ~
i ll
' I m ¥h.._...-".11" .
,...¢ L; \_=~:~>. , U -
ii IQ' I —::. m _ ;_,fl_£-;~I- 1%;
nus; r' m_.s
'"'""'*B= -r ' = ' J_sr"'.*3¢x__u. _. *' — "~ ' r 1' . as "v _ -
-. '\/v r
'" ' '"'. ' _"' '_'_" '-'= = i i - ' '_' _
l I
E
s
I4 ('5 GP
_- $
Llli l
ow" X
@@@@o
@@?@
swept
,j
di 5 " @ @ _ ~®
Wm
rd}
- —-— -— . will» 'ii' §?§.'TQ.'¥'i!'0§iII|i" ---»
5 mi W, /I ' " -—-—»
' "=-- ' -. '1;
i¥.OlP..'
{£4.41
'5? . r.
(F2
(L
@-
__ _ QB
Fig. 150. - Sectional view of the cut-out relay.
cl. Air gap (EL64 to 0,76 mm = 0.025 to 0.030 in).
Fig. 145. - Sectional view of the voltage regulator.
c. Air gap between core extension and armature (to be
measured at the position indicated by the axis 0-0 10,99
to 1,11 mm or 0.039 to 9.044 in).
1. Hinge spring {steel and bi-metallic). - 2. Armature. - 3. Adjusting spring. - 4. Fixed conlact supporting lip. - 5. Adjusting
spring supporting lip. - 6. Regulation resistance. - 7. Additional resistance in series with the shunted winding of the voltage
reguiator. - 8. Base. - 9. Body. - 10. Damping resistance. - 11. Additional resistance in series across the shunted windings
of the current regulator and cut-out relay. ~ 12-13. Plates ciamping the leads of the windings to the additional (7) and
regulation (5) resistances. - 14. Resistance terminals insulators.
The contacts points of the elements are fixed to the armatures (2) and to a support applied to the
elements. Point resetting is carried out by using a special tool on the tongues which carry the fix-ad
contact points. The cut-out reiay is similar to the other two elements and is also equipped with a hinge
(1) made of one sleet and one bi~metalllc ieaves. ,
The armatures of the three units are equipped with adiusting springs (3). Adjusting is done by loading
the tongues £5) of the springs. The three units are fastened to the base by the threaded ends on their
cores and sealed by a cover with a rubber gasket. The base is provided with three terminals, the num-
bers of wlch are marked on the cover connected to the cables as follows: ' .
- 51, connected to the generator positive terminal;
- 6'1, connected to the generator field coils;
- 30, connected to the electric system.
The following resistances are riveted under the base (Fig. 159):
--~ the additional resistance for the shunt winding of the voltage regulator (7) and additional resistance
tor the shunt winding to the current regulator and cut~out (11);
- the regulator resistance (6) connected in series to the acceleration winding {a}; damping resistance
(10) shunted to the generator field~wincling (between the current regulator body and ground).
O peration.
At iow speeds the generator voitags is not sufficiently strong to induce in the shunted windings of the
control box units a magnetic flux apt to attract the armature to the cores. All ermatures are therefore
at rest and the out-out contacts are open, whilst the current and voitage regulators ones are closed.
96
' m a w $ fi w w fi a 1 ¥ fl % 1 I fl M 1 F W M M § w W n W w M n ' w # l fl & f w w w w n a u m : u w a m w 4 W
5
sv
*5
2
: ~ ; , . - . : vi
» . 4 . - . ~ > . i " \ ; .
1'
\
a
?
Q
i