STUD-TAPERLOCK 3D0472 - Caterpillar

The UPS functions automatically in order to supply AC electrical power to the critical load. There are several operation modes that allow the UPS to accomplish this task. Most of the operating modes have several states that occur in that mode. The mode and the state are displayed on the LCD display. The LCD display is located on the front panel. The types of operating modes are listed below:
On-line
Bypass
Automatic Voltage RegulationThe UPS continually monitors internal systems and the incoming utility power. The UPS will automatically change between the modes, as required. This is accomplished with no intervention by an operator. The detection logic and the switching logic inside the UPS ensures that the changes in the operating mode are automatic and transparent to the critical load.On-line Modes
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On-line Mode"On-line" - The "Online" mode is the standard operating mode for the system. When the system is in this mode, the load is protected. The system is capable of discharging in order to support the load."On-line Charging" - The system enters this mode when the flywheel reaches 4000 RPM. The system is charging in this state. The system can sustain discharge in this state."On-line Standby" - The system enters this state when the flywheel reaches 7700 RPM. This mode is the rated idle speed for the flywheel.
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On-line DischargingOn-line Discharging - The system is in this state when the unit is supplying power to the load. If there is a disruption in power, the system will change to this state.Bypass Modes
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Bypass ModeBypass - Bypass mode directly connects the incoming utility to the system load. When the system is in the bypass mode, the load is not protected. The load can be affected by a disruption of incoming power.The Bypass mode is entered by one of the following events:
Start-up
The UPS Keyswitch (Manual)
Failure to recover from a faultRepeated errors that cause the system to oscillate between the "bypass" mode and "on-line" mode can lock the system into the "bypass" mode. When the system is locked in the "bypass" mode, the user must change the mode of the system. Use the UPS Keyswitch in order to change the mode of the system.Bypassed-Verify Signals - When the system is in this state, the system verifies that the correct system telemetry is present. This state is used during start-up of the system. This state is also used during the recovery of errors.Bypassed-Auto Start - This mode is the default state at start-up. The system cannot immediately protect the load after the system is started. The system will enter the Automatic Voltage Regulation mode during normal operation. Automatic Voltage Regulation Mode (AVR)
The Automatic Voltage Regulation Mode can be entered by one of the following events:
Start-up
Error (Flywheel)Automatic Voltage Regulation Auto Start - The system remains in the "AVR" Mode until the system is charged and until the system is able to sustain discharge. During the "Automatic Voltage Regulation Auto Start" state, the flywheel must achieve a rate of 45 RPM before changing to the Automatic Voltage