The operating modes are listed below:
- On-line
- Bypass
- Automatic Voltage Regulation (AVR)
- Manual
- Calibration
On-line Modes
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| Illustration 1 | g00875090 |
On-line Mode | |
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| Illustration 2 | g00875227 |
On-line Discharging | |
On-line - This 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 state when the flywheel reaches 4000 RPM. The system is charging in this state. The system can sustain discharge in this state. When the speed of the flywheel is greater than 7700 RPM, the system enters the On-line Standby state.
On-line Standby - When the speed of the flywheel reaches 7700 RPM, the system is in the On-line standby state. This is rated idle speed for the flywheel.
On-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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| Illustration 3 | g00875272 |
Bypass Mode | |
Bypass - 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 Keyswitch (Manual)
- Failure to Recover From a Fault
Repeated 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 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 when you are starting the system and the state is used during the recovery of errors.
"Bypassed-Auto Start" - This is the default state at start-up. The system cannot immediately protect the load after the system is started. During the normal operation, the system will enter Automatic Voltage Regulation ("AVR").
"Bypassed-Self Discharge" - This state stops the flywheel electrically. This state is used in order to prepare the system to be moved. Also, this state is used in order to secure the system for maintenance. This mode can be entered once in a 24 hour time period.
Automatic Voltage Regulation ("AVR")
This mode can be entered by one of the following events: Start-up and "Flywheel Error".
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, the flywheel must achieve a rate of 45 RPM before changing to the Automatic Voltage Regulation - Charging.
Automatic Voltage Regulation - Charging - The system enters this state when the system starts to charge the flywheel. When the speed of the flywheel is greater than 7700 RPM, the system enters the On-line Standby state. Normally, the system enters the On-line Charging state when the flywheel reaches 4000 RPM.
Automatic Voltage Regulation - Verify Signals - When the system is in this state, the system verifies that the correct system telemetry is present. This state is used when you are starting the system. This state is used also during the recovery of flywheels errors.
Manual Mode
The manual mode is intended to be used by service technicians. When the system is in the manual mode, a technician can conduct diagnostic tests of the subsystems. This mode is only accessible to qualified service personnel.
Calibration Mode
Calibration Mode is used in the factory during the initial calibration.
Calibration - Calibration Point - The system uses this state to calibrate a telemetery channel.
Calibration-Energizing - This state is used during sensor calibration. This state energizes the flywheel. The flywheel spins to several hundred RPM.
Calibration-Auto Adjusting - This state adjusts the commutation of the flywheel in order to maximize charging.