Application Guide

System Application Guide SAG582140000
Spec. No. 582140000 (Models 802
NLDB, 802NLEB and 802NL-B) Issue AW, June 3, 2014
Page 113 of 134
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(K) Low Battery Ambient Temperature #2 Alarm (if battery charge digital
temperature compensation probe installed): Adjustable from -49°C to +100°C.
You disable the feature by selecting the setting below -49°C. Factory set to off, unless
otherwise specified.
(L) Audible Alarm Cutoff Reset Feature: Adjustable from 0 to 15 minutes, in one minute
intervals. A zero setting disables the feature. Factory set at 15 minutes, unless otherwise
specified.
(M) Rectifier Sequencing: The time delay between turning individual Rectifiers on is
adjustable from 1 to 20 seconds, or feature disabled. The Rectifier Sequencing feature is
factory set to ‘disabled’.
(N) Timed Test/Equalize Period (also enables/disables the manually initiated timed
test/equalize feature): Adjustable from 1 to 99 hours, in one hour intervals. When a
value is set, the feature is enabled. You disable the feature by selecting the setting above
99. Factory set at 1 (one) hour, unless otherwise specified.
(O) Automatic Test/Equalize Period (also enables/disables the automatic test/equalize
feature): Adjustable from 0 to 15 times the discharge time period, up to a maximum of 300
hours. A zero (0) setting disables the feature. Factory set at zero (0), unless otherwise
specified.
(P) Relay Test Seconds: Adjustable from 5 to 120 seconds, in one second intervals. Factory
set at 45 seconds, unless otherwise specified.
4.1.6 MCA Audible Alarm and Audible Alarm Cutoff: The MCA contains an Audible Alarm, which
is located on the MCA Control Panel. The audible alarm sounds when any alarm condition
monitored by the MCA occurs. The alarm can be manually silenced (cutoff) by pressing a local
pushbutton. A local indicator illuminates when the audible alarm has been cutoff. The alarm
remains silenced for the current alarm condition only. If another alarm condition occurs, the
audible alarm again sounds.
A programmable audible alarm cutoff reset feature is provided. Once an audible alarm has
been cutoff, it automatically resets (and sounds if the alarm condition is still present) after the
time period programmed expires. If another alarm condition occurs, the audible alarm again
sounds.
4.1.7 Remote On/Off (TR): The operation of any or all Rectifiers can be inhibited (TR) via the MCA
Control Panel or from the LMS (if furnished). A Rectifier fail alarm is NOT issued.
4.1.8 MCA Alarm Logging: The MCA logs (with a date/time stamp) up to 500 recordable events.
4.1.9 Rectifier Sequencing: The MCA can be set to provide Rectifier Sequencing. When the MCA
senses an “AC Power is OFF to All Rectifiers” alarm, it turns off all Rectifiers. When the “AC
Power is OFF to All Rectifiers” alarm clears, the MCA turns on Rectifier #1, then turns on the
other Rectifiers starting with Rectifier #2 every n seconds (n is user programmable from 1 to 20
seconds). If the MCA fails or the communication link is broken during a Rectifier Sequencing
routine, all Rectifiers turn on immediately.
4.1.10 MCA Power Share Feature: The MCA Power Share feature allows you to connect the Spec.
No. 582140000 Power System to an existing DC power system instead of extending or
completely replacing the existing power system. The MCA Power Share feature provides for
the sharing of the total load in a controlled manner. When Power Share is programmed, the
MCA in the 582140000 Power System adjusts Rectifier output voltage per load demands to
ensure proper sharing between the two systems. For further information, request Application
Note AN38.
4.1.11 MCA Alternate Current Limit Feature: The MCA Alternate Current Limit feature provides a
means to limit the output current of all rectifiers based on the state of an external signal. The
rectifiers output current is limited to a percentage of rectifier output capacity as configured by
the user. A binary input on an installed MCA I/O circuit card is used to monitor the external
signal that triggers the current limiting action.
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