Triumph TR2 Service Instructions Manual page 282

ELECTRICAL EQUIPMENT
AUTOMATIC ADVANCE CURVE
CONTROL BOX. MODEL RBIo~-2
Later production cars were fitted with this
control box, the function of which is identical
to its predecessor, RB 1061 1.
REGULATOR CUT-OUT ADJUSTING
A D J U S T I N G SCREW
\
/
FIXED CONTACT
Fig. 36 Control Box with cover removed.
Automatic Advance Curve.
I.
GENERAL
The control box, shown in Fig. 36, contains
two units-a voltage regulator and a cut-
out. Although combined structurally, the
regulator and cut-out are electrically sepa-
rate. Both are accurately adjusted during
manufacture, and the cover protecting them
should not be removed unnecessarily. Cable
connections are secured by grub screw type
terminals.
The Regulator
The regulator is set to maintain the
generator terminal voltage between close
limits at
all
speeds above the regulating
point, the field strength being controlled
by the automatic insertion and withdrawal
of a resistance in the generator field circuit.
When the generator voltage reaches a
predetermined value, the magnetic flux in