Marconi LORAIN RHM800E50 Manual page 19

d) Repeat steps b) and c) as necessary to
obtain desired equalize voltage.
The value at which the current limif circuit
5.4
vents turtfter increase of output current is set by potenti.
hole on the front panel of the rectifier. Unless otherwise
at 110% of rated load. To change the current limit set-
ting, observe the following procedure:
WARNING
125% may bs tolerated for short periods of
overheat the recti@8r and cause permanent
the desired current limit setting, a resistive
test load should be used to insure the
amount
of load exceeds the desired oufpuf
current limit s8ttt"g.
To decrease the current limit setting, adjust
potentiometer CURRENT LIMIT ADJUST
decreases to the desired lknft.
To increase the cUf~aht liml setting, adjust
potentiometer CURRENT LIMlT ADJUST
to the desired liift.
Low Alarm Adiuetm
5.5 The low voltage alarm adjustment potentiometer
sets the value af which light
AGE ALARM illuminates and an external alarm is acti-
vated, if connected. Unless otherwise specified. the km
voftage alamt is factory adjusted for 47.15 VDC. To
readjust tftii limit. observe Me following procedure:
Turn off the rectifier by operating the
POWER switch to the OFF poskion.
Open the mater and control panels by loos-
ening the captive fasteners. Disconnect the
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rectifier from battery by removing the BAT-
TERY DISCONNECT link.
Connect an adjustable DC supply capable of
terminal (+) and either terminal of fuse Fl (-
), observing proper polarity.
Adjust potentiometer R36 fully counterclock-
wise. Refer to Figure 5-1 for location.
Turn on the external DC supply and adjust
output voftage to the desired low voltage
alarm value.
seconds to elqme
40
to
ment the
until light emitting diode LOW VOLTAGE
ALARM on the front panel illuminates.
As a check. Increase the output voltage of
the external DC supply; light emftting diode
LOW VOLTAGE ALARM should extinguish.
Slowly decrease the voltage until tight emit-
ting die LOW VOLTAGE ALARM illumi-
Steps
nates. Repeat
until the ahrm is activated at the desired
voltage.
Adjust power supply output voltage to
exactly the same value of battery voltage at
the rectifier output terminals. These voft-
ages should be measured wfth a digital mul-
tiieter.
With power supply output voftage pmperfy
adjusted, insert the BATTERY DISCON-
NECT link.
Turn off the external DC power supply, then
disconnect the test leads.
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adjust-
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