Marconi LORAIN RHM800E50, Manual

Page: 22 / 74

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If remote voltage sensing leads are
extended ( Option), disconnect and insu-
late. Connect internal voltage sensing leads
( Option) to terminals (+) and 2
of
TB3.
Install option assembly A10 on
circuit card
Connect the test load to the output
terminal (+) and either terminal of fuse
Adjust potentiometer clockwise.
Refer to Figure 5-l for location.
Start the and approximately
5% load.
Connect a digital capable of
measuring 60 VDC to monitor jacks and
TP2 and note the float and equalize output
voltage senings.
Adjust the output voltage by means of poten-
tiometer FLOAT ADJUST to the value at
which overvoltage shutdown is desired. If
the desired output cannot be
obtained the float potentiometer alone.
place in the
position. Continue to increase
the output using the EQUALIZE
ADJUST potentiometer.
Slowly adjust potentiometer R32 counter-
clockwise until circuit breaker HVSD trips
open.
As a check. the FLOAT and/or the
ADJUST potentiometer down.
Reset HVSD circuit breaker to the ON
increase output until
the circuit at the
Repeat, until the proper shut-
down voltage value is attained.
Adjust the FLOAT and EQUALIZE ADJUST
potentiometers for rectifier output voltage
lower the shutdown level. Start the rec-
tifier and adjust float and output
voltages to the values noted in Step g).
While the rectifier is operating, place the
BATTERY DISCONNECT
recep-
tacle. Immediately place the power switch to
the OFF position.
P)
Section 4387
Disconnect the test load and multimeter
leads. If the rectffier is normally connected
to a battery, remove the M option capacitor
assembly from circuit card A7.
If remote sensing is normally used at the
battery or load. disconnect the focal sensing
leads fmm
terminals 1 and 2. Connect
these leads to the storage terminals on cir-
cuit card
Connect the remote sensing leads to
1 (+) and 2 Insure that polarity
is correct.
Stat-l the rectifier by placing the POWER
switch to the ON position.
the meter
and control panels, then note the status of
indicators and
panel meters for proper
operation.
Sharing
5.9 This rectifier is equipped a load sharing cir-
cuit which allows the rectifier to share the load
other rectifiers that can be adjusted to the
same output voltage, and are equipped
bus load sharing circuits. For proper load it is
essential that each rectffier be adjusted to the same out-
put voltage. using the following
a) Temporarily open the rectifier load sharing
leads of all paralleled and off
all but one
CAUTION
If the load demand exceeds the of sin-
gle
the remaining load power is sup-
p l i e d t h e b a t t e r i e s . c a u s i n g
d)
the other paralleled turned
off, insure that the one still operating
is adjusted to the required output voltage at
100% rated load.
Check the kad sharing voltage across TB3
terminals 2 (-) and 3 (+) to determine it is 8
VDC. not, adjust potentiometer R28 on
circuit
A7 to obtain 8 VDC. Refer to
Figure for location.
Start the second rectffier to be adjusted.
off the first rectifier. and repeat Steps b) and
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