HOSE 4N5962 - Caterpillar

Modes of Operation
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 operating modes are listed below:
On-line Modes
Discharge Modes
Bypass Modes
Automatic Voltage Regulation Mode
Shutdown Mode
Manual Mode
Calibration ModeThe UPS continually monitors internal systems and the incoming utility power. The UPS automatically toggles between the modes that are listed above, and without intervention by an operator. The detection logic and the switching logic that is programmed into the UPS ensures that operating mode changes are automatic. The detection logic and the switching logic that is programmed into the UPS ensures that operating mode changes are transparent to the critical load.On-line Modes
Illustration 1 g01254179
Diagram of On-line ModeOn-line
On-line mode is the standard operating mode for the system. When the system is in this mode, the load is protected. The system is able to discharge in order to support the load.Motoring
The UPS is providing a constant voltage to the load. The UPS is drawing power from the input in order to spin the flywheels up to the speed for charging (4000 RPM). The UPS regulates voltage. When the flywheel reaches 4000 RPM, the UPS can discharge.On-line Charging
The system enters this state when the flywheel reaches 4000 RPM. The system is charging in this state. The system can sustain discharge in this state.On-line Standby
When the speed of the flywheel reaches 7700 RPM, the system is in the "On-line" standby state. 7700 RPM is rated idle speed for the flywheel.Discharge Modes
Illustration 2 g01254181
Diagram of Discharge ModeDischarge
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. There are four reasons that the flywheels will go into discharge.RMS Voltage (High or Low) - The UPS will discharge if the RMS voltage goes high by a certain percentage of the operating parameters that have been set. The UPS will discharge if the RMS voltage goes low by a certain percentage of the operating parameters that have been set. The the operating parameters are specified and adjustable by the user. A message will appear in the log file.Fast Voltage Transient - For every 52 microsecond cycle, the UPS monitors the voltage that originates from the utility. If the voltage that is specified by the user exceeds a certain range the flywheels will discharge in order to correct the voltage. If the voltage that is specified by the user drops below a certain range, the flywheels will discharge in order to correct the voltage. A message is sent to the log file.Frequency (High or Low) - The UPS is constantly monitoring the frequency of the utility power. If the UPS determines that the frequency is out of the specified range of the