Marconi LORAIN RHM800E50 Manual page 15

Section 4367
HIGH VOLTAGE ALARM Indicator: lllumi-
the output voltage increases to a
nates when
predetermined adjustable high voltage alarm
value. The high voltage alarm circuit moni-
tors output voltage continuously; therefore,
this alarm is operational even when the recti-
fier is turned off.
LOW VOLTAGE ALARM Indiitor: Illumi-
nates when the output voltage decreases to
a predetermined adjustable low voitage
alarm value. The low voltage a&m circuit
monitors output voltage continuously; there-
fore, this alarm is operational even when the
rectifier is turned off.
The LOW VOLTAGE ALARM indicator may illumi-
h) LOW CURRENT ALARM Indiitor: Illumi-
nates when the rectffier is operating and
supplying less than 0.5% of tated output cur-
rent or when the rectnier is turned off.
FUSE ALARM Indicator: Illuminates if one
or more fuses Fl thmugh F4 should open.
4.5 A DC ammeter and a DC voftmeter indicate reck-
fier output current and voltage. respectively.
voltmeter is connected acmss the reference leads, this
4.6 This rectifier provides conetant output voltage;
therefore, output current remains equal to load current
as long as load current does not exceed the current liik
setting. This mode of operation is known as float charg-
ing. In normal operation. the battery is not required to
furnish toad current and remains in a fully charged con-
dition.
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rent limit setting. the battery is required tofurnish
the dtQI&ertce and subsequently begins discharg-
ing.
4.7
equalize the charge of all battery cells, or to recharge
the battery as quickly as possble foflowing commercial
AC power failure. To obtain this voltage, operate the
FLOAT/EQUALIZE swkch to EQUALlZE positffn. To
restore usual float operation, operate the switch to the
FLOAT position.
4.6
initiated from a remote location. if desired. (Refer to
Power Data Sheet.) When the equalffe function is con-
condition $the recti-
trolled remotely, the FLOAT/EQUALIZE switch on the
Do not supply eqialize voltage
period than necesory.
cells and reduce battery life.
4.9
results in automatic rectifier shutdown:
the
nates but all other operating controls remain in their nor-
mal positions. Correctfon of the failure condiikm and
replacement of the opened fuses allows the rectifier to
for the next HVSD event.
current
Higher charging voltage is sometimes required to
The equalize function of the rectifier can also be
Occurrence of any of the following condiiions
a)
b) Overvoltage condition at rectifier output
If condition a) occurs, indicator FUSE ALARM illumi-
restart.
Once the failure has been corrected, placing the circuit
breaker toggle to the ON position shouM restart the rec-
utes wfthout a HVSD the circuit will reset and be ready
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