Alpha Technologies Cordex Controller Ver.2.0 - Manual (Page 80)

Refer to the back of this manual for Factory Service and Technical Support contact information
Alpha Technologies Ltd. 034-136-C0 Rev B WC
Printed in Canada. © 2010 Alpha Technologies Ltd. ALPHA and CORDEX are trademarks of Alpha Technologies Ltd. All Rights Reserved. Page 78 of 122
6.7 Controls
This menu category consists of power system controls. Parameters can be set/accessed such as low voltage
disconnect (LVD), high voltage shutdown (HVSD), and counter electro-motive force (CEMF) in/out.
Many of the parameters are similar to the items found in 6.5.3 Configure Alarms; such as, relay mapping and
alarm priority. Some parameters will not be displayed under the Configure window for all controls. Here are some
of the additional parameters the Supervisor can expect to encounter:
Activation Timer — For LVD countdown timer (activation), tap on the number to edit via a virtual numeric
keypad. Use with caution. Refer to the following section LVD Control.
NOTE: There are three possible triggers for opening the LVD, one of which is that loss of AC mains immediately starts
the activation timer, if it is enabled, and the LVD will open at the timeout point.
DOD Activation — For LVD control, tap on the number (percentage of DOD) to edit via a virtual numeric keypad.
Disconnect Voltage, Connect Voltage — for each LVD (1-10), tap on the number(s) to edit via a virtual numeric
keypad.
Inhibit Status — For LVD Inhibit, select from the pull-down menu; e.g., Inactive or Active. Selection will be in
effect real-time and not saved.
Activation Value — For HVSD, tap on the number to edit via a virtual numeric keypad.
Bypass Voltage, In-Circuit Voltage — For CEMF, tap on the number(s) to edit via a virtual numeric keypad.
6.7.1 LVD Control (USE WITH CAUTION)
The LVD feature controls a high capacity relay that disconnects the load during
extremely low voltage conditions — such as a deep discharge of the batteries during
an AC fail — and automatically reconnects the load once AC power returns.
Discharging the battery down to an extremely low voltage can cause damage to the
load and the battery. Having multiple LVDs will provide the capability of load shedding;
where the least critical loads are disconnected first.
With the CXC, the Supervisor can program connect/disconnect settings to govern the operation of ten separate
LVD controls. The LVD is activated when the Activation Voltage or the Activation Time is reached; whichever
comes first. The LVD also extends an alarm signal and a message will display on the GUI.
Under this window of operation, there is a list of menu items (tap to select) with scroll bars for navigation, see
Figure 80 below:
Figure 80–LVD Control window
Tap “Configure” to enter a new window of operation for the item selected. In this new window (Figure 81 below),
the Supervisor can set the following parameters:
Figure 81–Configure (item selected) sample window
Toggle the check box to select
Accept changes and
return to previous screen
Name of item being edited
Select from the pull-down menus:
Relay Mapping – N/A or relay 1 through 16.
Priority – Major, Minor or Message.
Tap Configure to change
selected menu item
Accept changes and
return to previous screen
Select menu item to configure Sliders and scroll bars
are used for navigation
Discard changes and
return to previous screen