6.7.1.1

DOD Activation

This menu item (LVD DOD Control) allows the Supervisor to configure each LVD control for

activation once the percentage of Depth of Discharge (DOD) has increased above a threshold.

This control works in conjunction with the existing LVD countdown timer and the disconnect

voltage. Whichever programmable parameter is met first, the LVD will be activated. Typically,

LVD DOD control is needed when ac mains fails, battery monitor is enabled, battery has

discharged for more than one (1) minute and DOD has risen above the threshold. If DOD

activates LVD, then the low voltage connect (LVC) causes reconnect.

6.7.2

6.7.3

6.7.4

LVD Inhibit

The LVD Inhibit feature provides the means to temporarily prevent all LVD controls from activating without

disabling the LVDs altogether, see example below. The Supervisor will then have 10 minutes to assess and

correct the condition(s) causing the LVD activation.

This menu item differs from other controls in that it cannot be disabled; “Enable Alarm” is grayed out. With that

exception, the remainder of the configuration is similar to all other controls (relay mapping, etc.), see Figure 82

above. It is logged in an identical manner, except that the only possibilities are ACTIVE and INACTIVE. Selection

will be in effect real-time and not saved – resets on power off.

Operation Example:

1. LVD condition occurs.

2. Audible alert sounds and a pop-up window will appear on the GUI prompting the user

to “Inhibit LVDs.”

3. For up to 60 seconds, LVD Inhibit may be evoked by the Supervisor. A password

prompt (with counter) will appear as required.

4. Selecting “Cancel” will reset the 60-second countdown; otherwise, if this time should

expire, the LVD Control will proceed to disconnect the load as configured.

5. Once evoked, LVD Inhibit control, now ACTIVE, will prevent LVD controls from

activating for 10 minutes.

6. LVD condition is corrected by Supervisor or LVD Inhibit may be evoked again.

7. Once LVD condition is corrected, LVD Inhibit must be reset manually as required.

HVSD

This menu item enables the Supervisor to program the setting for a HVSD control, which energizes a relay that

can shut down one or more rectifiers when the output voltage exceeds the Activation Value. The output from

HVSD relay is connected to the Remote Shutdown input on the rectifier cabinet. An alarm is also activated and

the message HIGH VOLTAGE SHUTDOWN will display on the CXC’s GUI.

CEMF

The CEMF Cell is a stand-alone panel; which is used to reduce the load voltage (by up to 3.0Vdc) to protect

sensitive loads from high voltages during battery equalize and float cycles.

6.7.4.1

6.7.4.2

Bypass Voltage

This menu item enables the Supervisor to set the voltage breakpoint to close the CEMF relay

and bypass the CEMF cell (or diode); to directly connect the load to the rectifiers without voltage

drops.

In-Circuit Voltage

This menu item enables the Supervisor to set the voltage breakpoint to open the CEMF relay

and connect the CEMF cell (or diode); to give the appropriate voltage drop to protect the load

connected to the rectifiers.

0350046-J0 Rev C

Page 82 of 127

Visit the Alpha website at www.alpha.ca for the latest manual and product downloads

6.8

6.8.1

6.8.2

6.8.3

Communications

This menu category consists of rectifier and power system communications controls. Parameters can be

set/accessed such as the web interface (e.g. IP address), and baud rates.

For a more detailed explanation, refer to the next chapters of the CXC Communications Menu Parameters and

Remote Communications.

Port Status (Web Interface Only)

This page displays the status of the Cordex controller ports; active or inactive for each of the following, shown

below:

Figure 83–Port Status and IP Information window