Application Guide

Installation Instructions Section 5876
Spec. No. 582140000 (Models 802
NLDB, 802NLEB and 802NL-B) Issue AT, April 26, 2013
Chapter 5. Installing the Rectifiers and Initially Starting the System Page 5-33
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Checking Total Distribution Load Alarm
Procedure
1) With "SYSTEM OK" being displayed on the MCA Interface Pad, press and
release the FUNCTION SET ENTER key.
2) Repeatedly press and release the FUNCTION SELECT DOWN arrow key until
ADJUST THE ALARM SETPOINTS is displayed.
3) Press and release the FUNCTION SET ENTER key.
4) Repeatedly press and release the FUNCTION SELECT DOWN arrow key until
TOTAL DISTRIBUTION = aaaaaA is displayed.
5) Record the value indicated on the display.
6) Press and release the ALARM CUTOFF and FUNCTION SET ENTER keys
simultaneously. Line 2 of the display is replaced by "CHANGE THE VARIABLE".
7) Press the FUNCTION SET NO (-) key until the value displayed is decreased to
below system output current level, then release the key.
8) Press and release the FUNCTION SET ENTER key.
9) “ARE YOU SURE?” is displayed. Press and release the FUNCTION SET YES
(+) key.
a) Requirement: MCA "MINOR" indicator goes red.
b) Requirement: MCA displays TOTAL DISTRIBUTION LOAD ALARM.
c) Requirement: External alarms activate (if configured).
10) With TOTAL DISTRIBUTION = aaaaaA being displayed in the ALARM
ADJUSTMENT MENU, press and release the ALARM CUTOFF and FUNCTION
SET ENTER keys simultaneously.
11) Press the FUNCTION SET YES (+) key until the value displayed is increased to
the value recorded in step 5) or to the required value for your site, then release
the key.
12) Press and release the FUNCTION SET ENTER key.
13) “ARE YOU SURE?” is displayed. Press and release the FUNCTION SET YES
(+) key.
a) Requirement: MCA "MINOR" indicator goes out.
b) Requirement: External alarms reset (if configured).
14) Press and release the FUNCTION SET YES (+) and NO (-) keys simultaneously,
to return to the beginning of the MCA menu tree.
Checking Distribution Group A Load Alarm
Perform this procedure only if distribution buses are set with A/B designation.
Procedure
1) With "SYSTEM OK" being displayed on the MCA Interface Pad, press and
release the FUNCTION SET ENTER key.
2) Repeatedly press and release the FUNCTION SELECT DOWN arrow key until
ADJUST THE ALARM SETPOINTS is displayed.
3) Press and release the FUNCTION SET ENTER key.