Hobart 5359D Operation And Maintenance Manual page 48

OM 2012
(c) Cmhxtor control switch
This is another tllrec-position, toggle ;v:itch (7, Fig. 11 ) id::n!,icaI f 0 the
eng it-,2 -genzrci-or control switch. \'d;.zn placed Tn the SF): rng loaded CLOSE
position, it prcvIdos 115-V AC
power
directty to a reci ifinr wl~ich supp1I.o;
DC povdcr for clG;ing
iho icad contocic'. W&n r-2 Ie~~?d it returns to the
normal ON position and continues to p:ovide po:v.zr to the rectifier, but
in this switch position, AC power must IXISS through the
pl"g
iniorl ock
and fuse interlock relays.
In OFF position the switch opens' the AC
circuit to the rectifier, thereby cuttln C-J off the source of DC power to the
contactor coil which allows the contactcr to open.
(d) Instrument light and switch
A shie Ided, instrument pancl light (1) is mounted
at the left si-Jc of the
control pane I. It is ccntrol!ed by a toggle switch (I;), which trI;o control;
instrument lights on the control box.
(e) Engine starting circuit
The pushbutton start switch (17) serves to connect
power for closing an
auxiliary solenoid switch (4, Fig. 5). The auxiliar;/ switch then connects
power to the starter solenoid which functions to engage the starter gear
with the flywheel ring gear and apply power to the starter motor to crank
the engine. The auxiliary solenoid switch is necessary because the start '
pushbutton switch is not capable of carrying the high amperage flow to the
starter solenoid which wolrld result if the starter gear and ring gear should
fa ii to engage. The pushbutton start switch (17, Fig. 11 ) is functional
only when the shutdown air valve is in latched (opn) position, which
places the start-z ircuit,
cut-out switch
(7, Fig.
5) in
CLOSED
pcsition.
(f) Indicating lights
A green indicating I ight (16) g I ows to indicate that
po:$'er
is available
to the engine protective system. The light operates only when the engine
is running and fuel pressure is sufficiently high to close a fuel fxessure
switch (5, Fig. 5). The purpose of the pressure switch is to deactivate
the protective circuit when the engine is stopped and prevent battery
discharge.
Another green indicating light (9, Fig. 11) glows when the generator
output load contact-or is CLOSED and power is available at the generator
output terminal panel (14, Fig.'3).
Aug 25185