Alternator System; Voltage Regulator Removal; Voltage Regulator Installation - Thrush Aircraft S2R-R1340 Maintenance Manual

THRUSH AICRAFT, INC - MODEL S2R-R1340

ALTERNATOR SYSTEM

The alternator system consists of an
alternator, voltage regulator and circuit
breaker (See electrical diagrams). The
alternator is connected to the right hand
panel power distribution buss and will
supply the current demands when output
voltage exceeds battery voltage. For
information concerning the removal and
installation of the alternator, refer to
Section 4.
VOLTAGE REGULATION
The alternator output voltage is regulated
by the voltage regulator circuitry (see
figure 10-1 C). By using an integrated
circuit comparator
regulated reference
alternator's voltage is amplified and
supplied to the comparator circuit, which
controls the shunt field excitation of the
alternator. After
alternator over-voltage control should be
adjusted to 27.5 VDC at the bus with
normal systems turned on.
10 - 4
AIRCRAFT MAINTENANCE MANUAL
amplifier with a
voltage, the
installation, the

VOLTAGE REGULATOR REMOVAL

Gain access to the voltage regulator by
removing R.H. aft cowl skin. If removal
is necessary, proceed as follows:
A. Verify that the battery switch is OFF.
B. Verify that the external power and
the battery are disconnected.
C. Proceed with regulator removal.
VOLTAGE REGULATOR
INSTALLATION
Reverse voltage
procedure.
regulator removal
Effective: 01/01/08