Application Guide

SAG582140001 System Application Guide
Issue AN, June 4, 2014 Spec. No. 582140001 (Model 801
NLDB, 801NLEB, 801NL-B)
Page 98 of 115
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6. MCA
6.1 Standard Features
6.1.1 MCA Interface: You interface with the MCA locally via the MCA Control Panel located on the
outside of the primary Power Bay's front door.
You can also interface with the MCA via the LMS, if furnished.
Note: Option switches are provided to lockout changing adjustment/configuration/calibration
settings via the MCA control panel and/or via the LMS.
6.1.2 MCA Local Display: Provides digital metering of system load voltage and current, individual
Rectifier Module output, and individual load shunts. Also displays system alarm messages and
adjustment information, as detailed in Paragraph 4.1.13 (MCA Display).
6.1.3 MCA Meter Accuracy: ±0.01 V, ±0.005% / °C
6.1.4 MCA Universal Adjustment Circuit: Provides single point control of float output voltage,
test/equalize output voltage, high voltage shutdown, and current limit adjustments.
Note: If the MCA should fail, the Rectifier Modules remember the float and high voltage
shutdown settings last delivered by the MCA. The current limit setting of each Rectifier
Module goes to 100% of rated full load.
Provides adjustments for all MCA alarm and control circuits. Adjustment ranges and factory
settings as follows.
All adjustments can be performed locally via the MCA Control Panel, and most can be performed
remotely via the LMS (if furnished).
(A) Rectifier Module Output Voltage: See Paragraph 3.1.1.
(B) Rectifier Module Current Limit: See Paragraph 3.4.6 (A).
(C) Rectifier Module High Voltage Shutdown: See Paragraph 3.4.6 (C).
(D) System High Voltage #1 Alarm: Adjustable from 48.00 to 59.00 volts DC. Factory set at
55.5 volts, unless otherwise specified.
(E) System High Voltage #2 Alarm: Adjustable from 48.00 to 59.00 volts DC. Factory set at
56.5 volts, unless otherwise specified.
(F) Battery On Discharge Alarm: Adjustable from 40.00 to 56.00 volts DC. Factory set at 51.0
volts, unless otherwise specified.
(G) Very Low Voltage Alarm: Adjustable from 40.00 to 56.00 volts DC. Factory set at 47.0
volts, unless otherwise specified.
(H) Total Distribution Load Alarm: Adjustable from 0 to 60000 amperes. Factory set at 2000
amperes, unless otherwise specified.
(I) Distribution Group A Load Alarm: Adjustable from 0 to 60000 amperes. Factory set at
2000 amperes, unless otherwise specified.
(J) Distribution Group B Load Alarm: Adjustable from 0 to 60000 amperes. Factory set at
2000 amperes, unless otherwise specified.
(K) High Battery Ambient Temperature #1 Alarm (if battery charge digital temperature
compensation probe installed): Adjustable from -50°C to +99°C. You disable the feature
by selecting the setting above +99°C. Factory set to off, unless otherwise specified.
(L) High Battery Ambient Temperature #2 Alarm (if battery charge digital temperature
compensation probe installed): Adjustable from -50°C to +99°C. You disable the feature
by selecting the setting above +99°C. Factory set to off, unless otherwise specified.
(M) Low Battery Ambient Temperature #1 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.
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