Chapter 7 - Configuring & Operating the SymmetraTM
Step 5: Configure Shutdown Parameters
Follow this procedure to configure the shutdown parameters that best fit your specific power requirements.
The following sequence on the PowerView opens the shut- down parameter selection screen:
Step 6: Configure Alarms
Follow this procedure to configure the alarm thresholds that best fit your specific power requirements.
Use the following sequence on the PowerView to open the alarm thresholds selection screen:
Fig
Shutdown Parameter Selection Screen
Fig 7-15 Shutdown Parameter Selection Screen
Each line of the shutdown parameter selection screen con- tains a configuration parameter. To set a parameter, select a line and press the Enter key. Note the flashing up/down ar- row appears. Select the desired parameter by scrolling up or down through the choices using the Arrow navigation keys. When the desired parameter is displayed, press the Enter key. The parameter is then recorded into the PowerView memory. Low Battery Duration - When in the on battery mode, the Power Array will signal an alarm 2, 5, 7, or 10 minutes before system shutdown will occur due to battery exhaustion. Make this selection based on the time that is required to save all data and switch off the load equipment.
Shutdown Delay - Some computer networks that issue shut- down commands require some additional run time after that command is issued to gracefully shut itself down. If your computer network is one of these, the Power Array provides a choice of a 20, 180, 300, or
Return Delay - when utility (mains) power is restored after a power failure, a delay interval may be desirable to allow util- ity power to stabilize before the system goes back on line. The return delay interval choices are 0, 60, 180, or 300 sec- onds.
Return Battery Capacity - When returning from an extended utility (mains) power failure, a minimum battery capacity is often desired before repowering the load. The choice of val- ues for this paramer are 0, 10, 25, and 90%. This minimal requirement ensures there will be sufficient battery run time to safely shutdown the load in the event of a subsequent power failure. Press the Enter key to record your selection, and then press the Escape key to return to the startup screen.
Fig
Alarm Thresholds Selection Screen
Fig 7-17 Alarm Threshold Selection Screen
Each line of the alarm threshold selection screen contains a configuration parameter. To set a parameter, select a line and press the Enter key. Note the flashing up/down arrow ap- pears. Select a desired alarm parameter by scrolling up or down through the choices using the arrow navigation keys. When the desired parameter is displayed, press the Enter key. The parameter is then recorded into the PowerView memory. Redundancy Alarm Threshold - The Power Array will signal an alarm if redundancy falls below this threshold. Base this selection on the number of power modules present (4kVA each), the size of the load, and the power module redundancy requirements. If redundant power modules are installed, it is highly recommended that this threshold be set so that the alarm will be initiated if the redundancy is lost (possibly as a result of an unauthorized increase of the load).
Maximum Load Threshold - The maximum load threshold can be set in increments of 2kVA. If the load exceeds this threshold, the alarm will sound.
Minimum Run Time Threshold - Select a minimum avail- able run time specifically for your power requirements. In the event that the Power View predicts the available run time is less than this threshold, an alarm will sound.
Switching Audible Alarm Beeper Off
Use the following sequence to access the beeper alarm on/off command: “Top level
