User's Manual
Table Of Contents
- Section 5877 (Issue AQ) CH01.pdf
- CHAPTER 1 SYSTEM OVERVIEW
- Table of Contents
- Preface
- System Description
- System Overview Illustrations
- Power/Distribution Bay
- Power Only Bay
- Distribution Only Bay
- Detail A - Distribution Bus Monitoring Circuit Card
- Detail B - System Monitoring and Control Section
- Detail C - Monitoring and Control Section (Distribution Only Bays)
- Detail D - Front Door (Primary Power/Distribution and Power Only Bays) MCA Control Panel and Display
- Detail E - MCA Circuit Card (Primary Power/Distribution and Power Only Bays) and Router Circuit Card (Secondary Power/Distribution and Power Only Bays and Distribution Only Bays)
- Detail F
- Details G - MCA I/O Circuit Cards
- Detail H - LMS I/O Circuit Cards
- Detail I1 - LMS 4 Input Analog Circuit Card (P/N 506336)
- Detail I2 - LMS 8 Input Analog Circuit Card (P/N 514528)
- Detail I3 - LMS 8 Input Temperature Circuit Card (P/N 506333)
- Detail I4 - LMS 4 Input Binary Circuit Card (P/N 506332)
- Detail I5 - LMS 8 Input Binary Circuit Card (P/N 506334)
- Detail I6 - LMS 4 Output Relay Circuit Card (P/N 506335)
- Detail I7 - LMS 12 Input Analog Circuit Card (P/N 520838)
- Detail J - Rectifier
- CHAPTER 1 SYSTEM OVERVIEW
- Section 5877 (Issue AQ) CH02.pdf
- Section 5877 (Issue AQ) CH03.pdf
- CHAPTER 3 SYSTEM OPERATING PROCEDURES
- Table of Contents
- LMS Operating Procedures
- LMS Local Port
- Local Controls and Indicators
- Location and Identification
- LMS Main/Expansion CPU Circuit Card (if furnished) Controls and Indicators
- Bay LED Indicator
- Distribution Bus LED Indicator
- MCA Component LED Indicator
- Bay Monitoring and Control Section Indicators
- MCA Controls and Indicators
- MCA Display
- Surge Suppression Alarms (available only if a Surge Suppression Option is furnished)
- Rectifier Controls and Indicators
- External Alarms
- Starting and Stopping System Operation
- Restarting Procedures when Rectifier is Automatically or Manually Inhibited, Shut Down, or Locked Out
- Output Voltage Mode of Operation Selection
- Setting MCA Audible Alarm Cutoff Reset Time Period
- Setting Rectifier Sequencing Delay Time Period
- Setting MCA Custom Text Messages (Names)
- Mapping LMS LED Channels to the MCA Display and MCA Customer Alarm Relays
- Using the Alarm Relay Test Feature
- MCA “Power Share” Feature
- MCA “ALTERNATE CURRENT LIMIT” FEATURE
- CHAPTER 3 SYSTEM OPERATING PROCEDURES
- Section 5877 (Issue AQ) CH04.pdf
- CHAPTER 4 MCA SYSTEM ADJUSTMENTS
- Table of Contents
- Adjustment Location and Identification
- Adjusting Float Output Voltage
- Adjusting Test/Equalize Output Voltage
- Adjusting High Voltage Shutdown
- Adjusting Rectifier Current Limit
- Adjusting System High Voltage Alarm 1
- Adjusting System High Voltage Alarm 2
- Adjusting System Battery On Discharge Alarm
- Adjusting System Very Low Voltage Alarm
- Adjusting Total Distribution Load Alarm
- Adjusting Distribution Group A Load Alarm
- Adjusting Distribution Group B Load Alarm
- Adjusting Battery Ambient High Temperature #1 Alarm (if Battery Charge Digital Temperature Compensation Probe is installed)
- Adjusting Battery Ambient High Temperature #2 Alarm (if Battery Charge Digital Temperature Compensation Probe is installed)
- Adjusting Battery Ambient Low Temperature #1 Alarm (if Battery Charge Digital Temperature Compensation Probe is installed)
- Adjusting Battery Ambient Low Temperature #2 Alarm (if Battery Charge Digital Temperature Compensation Probe is installed)
- Configuring Battery Charge Digital Temperature Compensation Slope
- Configuring Battery Charge Digital Temperature Compensation Maximum Voltage
- Configuring Battery Charge Digital Temperature Compensation Minimum Voltage
- Configuring Degree Units Displayed ((F or (C)
- Configuring the System Date and Time
- Configuring MCA I/O Circuit Card Analog Input(s)
- Configuring MCA I/O Circuit Card Analog Output(s)
- Configuring MCA I/O Circuit Card Binary Input(s)
- MCA Audible Alarm Cutoff Reset Time Period
- MCA Rectifier Sequencing Feature
- Manually Initiated Timed Test/Equalize Feature
- Automatic Test/Equalize Feature
- MCA Power Share Feature
- Alarm Relay Test Feature
- MCA “Alternate Current Limit” Feature
- CHAPTER 4 MCA SYSTEM ADJUSTMENTS
- Section 5877 (Issue AQ) CH05.pdf
- Section 5877 (Issue AQ) CH06.pdf
- CHAPTER 6 SYSTEM TROUBLESHOOTING AND REPAIR
- Contact Information
- Table of Contents
- Admonishments
- LMS Troubleshooting Procedures
- Troubleshooting Information
- Replacement Information
- Replacement Procedures
- Adding a Battery Charge Digital Temperature Compensation Probe to a Previously Operated System
- Removing a Battery Charge Digital Temperature Compensation Probe from a Previously Operated System
- CHAPTER 6 SYSTEM TROUBLESHOOTING AND REPAIR
User Instructions Section 5877
Spec. No. 582140000 (Models 802NLDB, 802NLEB and 802NL-B) Issue AQ, January 15, 2013
Chapter 3. System Operating Procedures Page 3-25
This document is property of Emerson Network Power, Energy Systems, North America, Inc. and contains confidential and proprietary information owned by Emerson Network Power, Energy
Systems, North America, Inc. Any copying, use, or disclosure of it without the written permission of Emerson Network Power, Energy Systems, North America, Inc. is strictly prohibited.
MCA “ALTERNATE CURRENT LIMIT” FEATURE
Description
The MCA Alternate Current Limit feature provides the means to automatically change the
current limit operation of power system’s rectifiers (PCUs) when an external
event/condition occurs.
Operating Modes
Normal Current Limit Operation
When the signal connected to the “Alternate Current Limit Input” is inactive, the system’s
PCUs current limiting feature operates at the value based on the “PCU Current Limit”
parameter setting.
Alternate Current Limit Operation
When the signal connected to the “Alternate Current Limit Input” is active, the system’s
PCUs current limiting feature operates at the value based on the “Alternate Current Limit
Capacity” parameter setting.
Requirements and Conditions
The system must have an MCA I/O circuit card installed.
Binary input #4 must be connected to a signal that will indicate to the MCA to place the
rectifiers into the “Alternate Current Limit” mode.
Programming the MCA Alternate Current Limit Feature
When the Alternate Current Limit is first enabled, the “Alternate Current Limit Capacity”
parameter defaults to a value of 100% of available capacity.
Note: The “Alternate Current Limit” feature is not compatible with the Power Share
feature. If Power Share is programmed ON, then “Turn Off Power Share” is
displayed in the Alternate Current Limit menu.
Note: The PCU current limit menu item setting is ignored when Alternate Current Limit is
enabled AND the Alternate Current Limit Input is active. When this occurs, the
message “ALT. LIMIT” is displayed in the PCU Current Limit menu.
Enabling Alternate Current Limit
1) With SYSTEM OK being displayed on the MCA Interface Pad, press and release
the FUNCTION SET ENTER key. The FUNCTION MENU is displayed.
or
In the MAIN ALARM MENU, repeatedly press and release the FUNCTION
SELECT DOWN arrow key until "GO TO FUNCTION MENU" is displayed. Press
and release the FUNCTION SET ENTER key. The FUNCTION MENU is
displayed.
2) Repeatedly press and release the FUNCTION SELECT DOWN arrow key until
"ADJUST THE SYSTEM VOLTS & AMPS" is displayed.
3) Press and release the FUNCTION SET ENTER key.
4) Repeatedly press and release the FUNCTION SELECT DOWN arrow key until
"ALT. LIMIT IS OFF, TURN IT ON?" is displayed.
5) Press and release the ALARM CUTOFF and FUNCTION SET ENTER keys
simultaneously. "ARE YOU SURE?" is displayed. Press and release the
FUNCTION SET YES (+) key.