Manual

89
0700015-J0 Rev B
6.8 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 electromotive force (CEMF) in/
out. Many of the parameters are similar to the items found in 6.6.3 Configure Alarms, such as, relay map-
ping and alarm priority. Some parameters are not displayed under the Configure window for all controls.
The following 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 numer-
ic keypad. Use with caution. Refer to the following section LVD Control.
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 (% 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.
6.8.1 LVD Control (USE WITH CAUTION)
WARNING: 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 automatical-
ly 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.
Tap “Configure” to enter a new window of operation for the item selected. In this new window, shown
below, the Supervisor can set the following parameters:
Figure 105 — LVD Control window
Select menu item to congure
Tap Congure to change
selected menu item
Sliders and scroll bars are
used for navigation
Accept changes and return to
previous screen
Name of item being edited
Toggle the check box to select
Discard changes and return to
previous screen
Select from the pull-down menus:
Relay Mapping – N/A or relay 1 through 16.
Priority – Major, Minor or Message.
Accept changes and return to
previous screen
Figure 106 — Configure (item selected) sample window