Galaxy VL UPS – Operation PDF
990-91379B-001

eConversion Behavior Scenarios – Parallel System

Main Success Scenario for the UPS System to Enter eConversion

  1. The controlling parallel (master) UPS unit has been in inverter operation for at least 30 seconds.

  2. The controlling parallel UPS unit checks that bypass is within tolerance and that bypass is available.

  3. The controlling parallel UPS unit checks that eConversion is allowed both for itself and for all controlled parallel UPS units.

  4. The UPS system transfers to eConversion mode.

NOTE: Any return from eConversion operation 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)

  1. The parallel system is in eConversion mode.

  2. Input becomes out of tolerance on one or more parallel UPS units, but bypass is still within tolerance on all parallel UPS units.  

  3. The parallel system stays in eConversion mode.

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

  1. The parallel system is in eConversion mode.

  2. Bypass becomes out of tolerance or bypass is no longer available on one or more parallel UPS units.  

  3. The parallel system transfers to inverter operation immediately.

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

  1. The parallel system is in eConversion mode.

  2. Bypass becomes out of tolerance or bypass is no longer available on one or more of the parallel UPS units.

  3. The parallel system transfers to inverter operation immediately.

  4. Bypass becomes within tolerance and bypass is available on all parallel UPS units.

  5. After 10 seconds of stable bypass availability, the parallel system returns to eConversion mode.

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

  1. The parallel system is in eConversion mode.

  2. Input and bypass become out of tolerance on one or more of the parallel UPS units.

  3. The parallel system transfers to inverter operation immediately.

  4. Bypass becomes within tolerance and bypass is available on all parallel UPS units. 

  5. After 10 seconds of stable bypass availability, the parallel system returns to eConversion mode.

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

  1. The parallel system is in eConversion mode.

  2. eConversion mode is disabled or no longer allowed on one or more of the parallel UPS units.  

  3. The parallel system transfers to inverter operation immediately.

eConversion Behavior Scenario 6 (Inverter Started)

  1. The parallel system is in eConversion mode and eConversion mode is set as always allowed.

  2. The user pushes the inverter ON button on one parallel UPS.  

  3. The parallel system transfers to inverter operation immediately.

  4. When the parallel system has been in inverter operation for 10 seconds it will return to eConversion mode.

eConversion Behavior Scenario 7 (Inverter Started)

  1. The parallel system is in eConversion mode and eConversion mode is set as only allowed at a specific time and day of the week.  

  2. The user pushes the inverter ON button on one parallel UPS.  

  3. The parallel system transfers to inverter operation immediately.

  4. The parallel system will return to eConversion mode when it reaches the next calendar time interval where eConversion mode is allowed.

eConversion Behavior Scenario 8 (Critical Even/State Detected)

  1. The parallel system is in eConversion mode.

  2. One parallel UPS detects a critical event/state that requires the UPS to enter forced static bypass operation.  

  3. The remaining parallel UPS units can support the load.

  4. The parallel system transfers to inverter operation immediately and the UPS with a critical event/state transfers to static bypass standby operation.

eConversion Behavior Scenario 9 (Critical Event/State Detected)

  1. The parallel system is in eConversion mode.

  2. One parallel UPS detects a critical event/state that requires the UPS to enter forced static bypass operation.  

  3. The remaining parallel UPS units cannot support the load.

  4. The parallel system transfers to forced static bypass operation and stays in forced static bypass operation until the critical event/state is resolved.

eConversion Behavior Scenario 10 (Critical Event/State Detected)

  1. The parallel system is in eConversion mode.

  2. One parallel UPS detects a critical event/state that requires the UPS to enter forced static bypass operation.

  3. The remaining parallel UPS units cannot support the load.

  4. The parallel system transfers to forced static bypass operation and stays there until the critical event/state is resolved.

  5. The critical event/state is resolved.

  6. The parallel system transfers to inverter operation.

  7. After 10 seconds, the parallel system returns to eConversion mode (if eConversion mode is still allowed).

eConversion Behavior Scenario 11 (Output Overload)

  1. The parallel system is in eConversion mode.

  2. The parallel system output is overloaded.  

  3. The parallel system transfers to inverter operation and the overload timer starts counting.

eConversion Behavior Scenario 12 (Short Circuit Detected)

  1. The parallel system is in eConversion mode.

  2. An output phase-phase or phase-neutral short circuit is detected (high current is detected in bypass and event is logged).

  3. The parallel system transfers to inverter operation.

  4. If the short circuit continues, the parallel system transfers to forced static bypass operation.

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