eConversion Behavior Scenarios – Single System

Main Success Scenario for the UPS to Enter eConversion

The UPS has been in inverter operation for at least 10 seconds.
The UPS checks that bypass is within tolerance and that bypass is available.
The UPS checks that eConversion mode is allowed (enabled by default/enabled by user).
The UPS transfers to eConversion mode.

NOTE: Any return from eConversion mode to inverter operation will include a short period in battery operation to allow the PFC to start up and synchronize.

eConversion Behavior Scenario 1 (Input Out of Tolerance)

The UPS is in eConversion mode.
Input becomes out of tolerance, but bypass is still within tolerance.
The UPS stays in eConversion mode.

eConversion Behavior Scenario 2 (Bypass Out of Tolerance/Bypass Not Available)

The UPS is in eConversion mode.
Bypass becomes out of tolerance or bypass is no longer available.
The UPS transfers to inverter operation immediately.

eConversion Behavior Scenario 3 (Bypass Out of Tolerance/Bypass Not Available)

The UPS is in eConversion mode.
Bypass becomes out of tolerance or bypass is no longer available.
The UPS transfers to inverter operation immediately.
Bypass becomes within tolerance and bypass is available.
After 10 seconds of stable bypass availability, the UPS returns to eConversion mode.

eConversion Behavior Scenario 4 (Input and Bypass Out of Tolerance)

The UPS is in eConversion mode.
Input and bypass become out of tolerance.
The UPS transfers to inverter operation (battery operation) immediately.
Bypass becomes within tolerance and bypass is available.
After 10 seconds of stable bypass availability, the UPS returns to eConversion mode

eConversion Behavior Scenario 5 (eConversion is Disabled/No Longer Allowed)

The UPS is in eConversion mode.
eConversion mode is disabled (by user) or no longer allowed (by setting/threshold).
The UPS transfers to inverter operation immediately.

eConversion Behavior Scenario 6 (Inverter Started)

The UPS is in eConversion mode and eConversion mode is set to always allowed or to only allowed at a specific time and day of the week.
The user pushes the inverter ON button.
The UPS transfers to inverter operation immediately.
The UPS will return to eConversion mode when it reaches the next time interval where eConversion mode is scheduled as allowed or after 10 seconds if eConversion is set to always allowed.

eConversion Behavior Scenario 7 (Output Overload)

The UPS is in eConversion mode.
The UPS output is overloaded.
The UPS transfers to inverter operation and the overload timer starts counting.

eConversion Behavior Scenario 8 (Critical Event/State Detected)

The UPS is in eConversion mode.
The UPS detects a critical event/state that requires the UPS to enter forced static bypass operation (not output overload).
The UPS transfers to forced static bypass operation.
The critical event/state is resolved or is no longer present.
The UPS transfers to inverter operation.
After 10 seconds in stable inverter operation, the UPS returns to eConversion mode.

eConversion Behavior Scenario 9 (Short Circuit Detected)

The UPS is in eConversion mode.
An output phase-phase or phase-neutral short circuit is detected (high current is detected in bypass and event is logged).
The UPS transfers to inverter operation.
If the short circuit continues, the UPS transfers to forced static bypass operation.

eConversion Behavior Scenario 10 (EPO Activated)

The UPS is in eConversion mode.
EPO is activated.
The UPS transfers to off mode.
EPO is deactivated.
The user pushes the inverter ON button.
The UPS transfers to inverter operation.
After 10 seconds in stable inverter operation, the UPS returns to eConversion mode.

eConversion Behavior Scenario 11 (High Efficiency Mode Disabled by System)

The UPS is in eConversion mode.
Bypass becomes out of tolerance or bypass is no longer available.
The UPS transfers to inverter operation.
Bypass becomes within tolerance and bypass is available.
After 10 seconds of stable bypass availability, the UPS returns to eConversion mode.
Step 2 to 5 repeats 10 times within a 24-hour interval (the number of times is configurable).
Bypass becomes out of tolerance or bypass is no longer available for >10 times in a 24-hour interval.
The UPS transfers to inverter operation.
The UPS disables high efficiency mode.
The user is informed that high efficiency mode has been disabled by system via either an alarm or an event depending on the configuration.
Bypass becomes within tolerance and bypass is available.
The UPS stays in inverter operation.
The user re-enables high efficiency mode.
After 10 seconds of stable bypass availability, the UPS returns to eConversion mode.