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.
