PAVING MACHINE ELECTRICAL SYSTEM.
The paving machine electrical system is a 12 VDC
system with the exception of a 24 VDC alternator and 24
VDC engine starter. Two 12 VDC wet storage batteries
are used in series as the power source. An electronic
voltage transformer allows for both the 12 VDC and the
24 VDC to be used without interference. Details of the
1.18.1. Electrical System Power Distribution. The
paving machine battery supplies 12 VDC to the voltage
From the voltage transformer, this 12 VDC is routed to
the 80 amp circuit breaker. Through the 80 amp circuit
breaker, 12 VDC is applied to the contacts of the power
relay, the horn switch, and to circuit breakers (CB) 8
The voltage through CB8 is sent to the emergency stop
switch on the operator switch panel. From the operator
emergency stop switch, the voltage is sent to the
emergency stop switches on the screed control panels.
With all three
emergency stop switches in the normal, pulled out
position, the voltage is applied to the ignition switch. In
all positions of the ignition switch other than STOP, the
voltage is applied to the coil of the power relay (R5).
When any of the three emergency stop switches is
pushed in, all power to the paving machine is turned off,
except to the horn and the work lights.
With power relay (R5) energized, 12 VDC is passed
through the contacts of the power relay to supply voltage
to CBI through CB6 on the operator gauge panel. Power
is also supplied to CB11 through CB4 on the left screed
control panel and CB 1 through CB3 on the right screed
CB9 through CB11 supply power to the work light
switches on the operator gauge panel.