System Operation
Copyright © 2007-2018 Eaton Corporation. All Rights Reserved.
IPN 997-00012-03 B2 Issue B2 July 2018
49
Characterization
The LVD Characterization process determines the optimum operating voltages to suit the
contactor(s) coil voltage. These values are stored in the SC300 and on the I/O board.
An LVD Characterization Error alarm will be activated if the SC300 detects that the characterization
values stored in the SC300 and on the I/O board are different. This happens when any of these
occurs:
• The SC300 is replaced.
• The I/O Board is replaced.
• Both the SC300 and the I/O Board are replaced.
LVD Characterization Error alarms can only be cleared from the SC300 front panel, not using Web.
• To clear the alarm when the SC300 is replaced, on the SC300 go to Alarms, select the LVD
Character. Err. active alarm and press Details, select Clear and press Enter, select Characterize
with IOB Values and press Save.
• To clear the alarm when the I/O Board is replaced, on the SC300 go to Alarms, select the LVD
Character. Err. active alarm and press Details, select Clear and press Enter, select Characterize
with SC Values and press Save.
• To clear the alarm when both the SC300 and the I/O Board are replaced, go to Alarms, select
the LVD Character. Err. active alarm and press Details, select Clear and press Enter, select
Characterize Contactor and press Start.
When a contactor is re-characterized it will disconnect and re-connect several times. Refer to
Maintenance in the dc power system Installation and Operation Guide for full instructions.
Factory-fitted contactors will be characterized at the factory. If an existing contactor is replaced,
characterize the new contactor from the SC300.
In this case, there will be no LVD Characterization Error alarm.
• To characterize the new contactor, go to Battery, go to the LVDs tab, select the appropriate LVD
channel and press Details, select the appropriate contactor and press Edit, select Characterization
and press Enter, select Characterize Contactor and press Start.
LVD Operation
► To allow access to LVD functions from the SC300 keypad
• In DCTools/Web go to: Control Processes > LVD.
• Select the Allow Front Panel LVD Control check box.
If the check box is cleared LVD functions can only be accessed using DCTools/Web.
► To manually connect or disconnect an LVD control channel from the front panel
• Use the SC300 keypad to go to: Battery > LVDs > LVD 1 - LVD 16 > Details > Manual Control.
• Select Connect or Disconnect to connect or disconnect the channel (and all mapped contactors).
The contactor(s) will remain in the selected state until the manual reconnect timeout period is
reached or the contactor is manually reconnected.
• Select Auto to return the LVD control channel to automatic operation.
► To manually disconnect an LVD control channel using web
• Go to Low Voltage Disconnect > LVD Manual Control
• Select Disconnect to disconnect the channel (and all mapped contactors).
The contactor(s) will remain in the selected state until the manual reconnect timeout period is
reached or the contactor is manually reconnected.
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