Hobart 5359D Operation And Maintenance Manual page 46

OM 2012
(k) Au;:i ij(::;y
utl&riiccjucncy relay
The fu;;r:ticn of i-he auxiliary ui-&rircqucnc y rc: lny (3) is to autcmclt isc I I;;
open i!:c e):Cjt~Cltion-d~energii_ati!,n
rc lay Clild
c]ijCoilneCt th-?
vollugc i-c31;1'1-
tcf anytire 9F:ncl'atcr frequency drop
f-o
389 t!z c; kIo*.~.
This
p~uic-.;s
the vi.:l!~~;;c i'egulatc: (Fig.
12) and lxiiozt re;istoi-s (2, i:iy. 3) again:t
over load wh iCh could be caused by very high vo!)age regulntor- output in
its cttempi to maintain voltage cv!len the gene:'atcz is o;~fo: ir:g at a sp~cd
which Cannot produce normal voltage output.
NOTE: if the auxifiary underfrequency relay 'r, tripp~cl, it will be
necessary to momentarily place engine oprating mo& switch
(5, Fig. 11) in BUILD-UP-VOLTAGE po;Ition to restcre gen-
erator voltage.
F.
Engine Contro I Panel (See Fig. 11)
The engine control panel is mounted dire.ctly below the ccntro! box.
In odd it ion
to engine controls end instruments, generator output controls are mounted here.
A plexiglass window in the canopy rear door,
slants outward .at the botfom to form
cm opening for access to controls when the door is closed.
(I) Engine instruments
,
Engk operation is monitored by an ammeter cd>, a coolant temperature gage
(8) , and
an
oil pressure gage (10). An hourmeter (6) records engine operating
time.
(a) Ammeter
The ammeter (4) indicates the direction and value of current flow in the
12-V DC electrical system. Its graduated range is from -60 A through
0 A, to 360 A.
(b) Temperature gage
The temperature gage (8) is a mechanical type of unit construction.
It
consists of a panel mounted indicating mechanism which is connected by
a capillary tube to a bulb mounted in the engine cooling system. The
gage indicates engine coolant temperature in the range of lOOoF to
2200F.
l-l
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Aug 25
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