Powerware SOLA 4000 manual Operating Modes Parallel and Parallel/Redundant Operation

SOLA 4000 - Operation

4 Operating Modes Parallel and Parallel/Redundant Operation

4.5 Bypass Operation

The "Bypass Operation" mode is activated by a multiple inverter failure or overload

•If the load is greater than 110% of the load capacity of all available inverters, the static bypasses of all individual units will connect the load with the mains directly

•All inverter output switches (SSI) will open, inverters may continue to operate

•The rectifiers continue to charge the batteries

•If the load is reduced to 100% or less of the load capacity of all available inverters, the system switches automatically back to normal operation

•All bypasses always switch on together.

•If a standby unit was off at the time of the inverter failure/ overload, it will automatically switch ON and all units take-over the load.The operation then becomes as in paragraph 4.1 (when there was an overload) or as in paragraph 4.4 (when an inverter failure occurred).

4.6 Maintenance Bypass Operation

The "Maintenance Bypass Operation" mode is used to supply the load directly from mains during maintenance or repair work.

•During this mode, the individual functional components are completely separated from the load (e.g. for maintenance work)

•Power for the load will be supplied directly from mains through internal or external power switch(es) (IBY)

Note: If the 3-position maintenance bypass cabinet MB3/2 is installed, the UPS system may be totally isolated from all supply by switching to the 3rd position "UPS ISOLATED". Again the load will be supplied through the maintenance bypass switch.

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