Operation - Marconi LORAIN RHM800E50 Manual

3.7
Input Connections: Connect the three phase AC
60 Hz, power leads at terminals Li . L2 and L3 on con-
Output Connections: Connect DC output leads to
3.8
output terminals +BAT. and -BAT at the right side of the
rear panel.
Earth Ground (Green Wire) Connections: A
3.9
frame ground lug (GND), located near contactor Ki.
must be connected to an earth ground (green wire). Do
Polarity of the uo1tage se&g leads is critl-
terminal If+) and U-1 on terminal board TB3

OPERATION

3.10 Local or Remote Voltaae Sensing: Terminals 1
(positive) and 2 (negative) on terminal board TB3 are
provided as v&age sensing terminals. These terminals
may be connected at the output of the rectiiier or
extended to sense the voltage at a remote location. To
achieve the most effective regulation of output voltage,
the sense leads should be exiended to the battery or
power board at which regulation is required.
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negative bus load sharing circul which enables it to
the same output v&age rating. When both rectifiers
I-
have compatible load sharing circuits, a load sharing
connection shoufd be made between the load sharing
terminals of each rectifier. The load sharfng terminal of
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this rectifier is located at terminal board TB3 terminal 3.
the load sharing lead and terminal bkxk capacity. For
proper operation. if is essential that each rectffier be
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adjusted for proper output voltage and load sharing loop
voltage. Refer to the ADJUSTMENT section for detailed
information.
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3.12 Remote Eaualize Control: The equalize mode of
operation can be remotely controlled by providing a
WARNING
closed circuit between terminals 4 and 5 of TB3. or by
providing positive battery voltage at terminal 4 only. An
open circus between these terminals or removal of posi-
tive battery voltage from terminal 4 restores OpemtiOnaf
mode control to the FLOAT/EQUALIZE switch on the
rectifier front panel.
3.13 Phase Loss/Reduced Load Alarm: If for any rea-
son, rectifier experiences a high ripple condition caused
by an AC input phase loss an alarm is activated and the
rectifiers output voltage and current will be at a reduced
level. Extended alarm contacts are acfiitad to provide
closed loop circuits between terminals 26 to 27 and 29
to 30 of terminal block TB3. while open loop circuits are
provided between terminals 25 to 26 and 26 to 29 of ter-
minal blodc TB3. During normal operation closed loop
circuits are provided between terminals 25 to 26 and 26
to 29 of terminal block TB3. while open loop circuits are
provided between terminals 26 to 27 and 29 to 30 Of ter-
minal block TB3.
3.14 Rectaier Fail Alarm: During normal rectiiier oper-
ation, posttiie battery is provided at T83 terminal 12 to
provide an exlemal normal operation indication. If a
rectifier failure condiikn occurs, positiie battery is
removed from TB3 terminal 12 and applied to TB3 ter-
minal 10 to actuate external rectifier fail alarms. A recti-
fier failure condition includes the following operational
modes or alarm conditions:
High voltage alarm
Low voltage alarm
Low current a!arm
Partial load current limtt operation
Fan fail alarm
Fuse alarm
Manual or automatic removal of AC power,
including commercial power failure condiiion
provided at lB3 termfnals IO to 1 I during a recti-
Section 4367
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