Community College of Allegheny County OCS Security Camera System Pittsburgh, PA
a.
DC Overvoltage Shutdown
b.
DC Under voltage Shutdown (End of Discharge)
c. DC Under voltage Warning (Low Battery Reserve); factory default set at 2 minutes (user configurable 2 to 30 minutes) 4. Output Frequency: An oscillator shall control the output frequency of the UPS. The inverter shall maintain the output frequency to ±0.1Hz of nominal frequency during Battery mode, Frequency Converter mode or when otherwise not synchronized to the utility/mains source. 5. Output Protection: The UPS inverter shall employ electronic current limiting circuitry. 6. Battery Over Discharge Protection: To prevent battery damage from over discharging, the UPS control logic shall automatically raise the shutdown voltage set point; depending on output load and connected battery system at the onset of battery operation. General: The UPS shall be provided with a microprocessor-based unit status display and controls section designed for convenient and reliable user operation. The monitoring functions such as voltages, currents, UPS status and alarm indicators shall be displayed on a full color graphical LCD display. 2. System: UPS display shall also include LED based system indicators. The system level indicators shall be: run indicator, and alarm indicator: Display and Controls 1.
C.
Indicator
LED Color
LED State
Indication:
On
UPS has output Inverter is starting UPS has no output
Blinking
Run Indicator
Green
Off On On Off
Yellow
Alarm occurs Fault occurs
Alarm Indicator
Red N/A
No alarm, no fault
3. Controls: UPS startup and shutdown operations shall be accomplished by using power button on the front panel of the UPS. The display shall be menu driven navigation and use four control buttons for ease of navigation and selection of the configurable parameters. a. Control Buttons: The UPS display control button functionality shall be as follows: 1) ESC button: This button shall return to the previous menu or abort any change before confirming the change.
263353-8
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