Marconi LORAIN RHM800E50 Manual page 21

Section 4387
Connect the local sensing leads to TB3 ter-
minals 1 (+) and 2 (-). Insure that polarity is
correct.
Remove the BATTERY DISCONNECT link
to isolate the rectifier from the battery or
load.
Install the M option capacitor assembly,
edge connector of regulator and alarm cir-
cuit card A7. Refer to Figure 4-l for mount-
ing location.
DANGER
the DC output terminals.
Connect a DC ammeter and a resistive test
load in series. Connect the leads of this test
either terminal of fuse Fl (-), observing
proper polarity.
Adjust potentiometer RSO fully counterdock-
wise. Refer to Figure 5-l for location.
Adjust the resistive test load for maxknum
resistance.
load for a" ammeter indication of 4 amperes
(0.5% full load).
Slowly adjust potentiometer R50 clodwise
until the LOW CURRENT ALARM indicator
illuminates.
Adjust the resistive test laad to place slightly
more load on the rectifier output. The LOW
guish.
Reduce the amount ot load to 4 amperes.
The indicator should illuminate. If neces-
sary, adjust R50 to obtain the alarm indica-
tion at a load of 4 amperes.
Place the BATTERY DISCONNECT liik into
its receptacle, the" immediately place the
POWER switch to the OFF position.
Disconnect the test leads ot the external
ammeter and resistive load.
If the rectlfiir is normally connected to a bat-
tery, remove the M option capacitor assem-
bly from the reguhtor and alarm circuit card
A7.
If remote sensing is normally used at the
P)
load. disconnect the local sensing
battery or
leads from TB3 terminals 1 and 2. Connect
these leads to the storage terminals on cir-
cuit card A9.
Connect the remote sensing leads to TB3,
terminals 1 (+) and 2 (-). Insure that polarity
is correct.
Start the rectifier by phcing the POWER
and control panels. then note the status of
indicators and front panel meters for proper
operation.
5.9 This adjustment sets the limit at which the recti-
fier is shutdown if a high voltage condlion occurs. This
adjustment is made by wervoltage adjustment potenti-
ometer R32 on Regulator and Alarm Circuit card A7.
Unless otherwise specified, the overvoltage shutdown
adjustment is factory set at 55.0 VDC. To readjust the
overvoltage shutdown limit, observe the following proce-
a) Turn the nxtiiier off by operating the
POWER switch to the Off position.
meter
Open the
TERY DISCONNECT link.
DANGER
s t e p c l . Eoearccous DC uoltuge ir p-t a t
the
DC output terminuls.
and control panels by ioos-
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