SOLA 4000 - Operation
3 Operating Modes Hot-Standby Operation
•If an additional failure in the first unit occurs, or when the battery of that unit is exhausted, the inverter of another unit will takeover the load, continuing in battery operation until the mains returns or the second battery is exhausted.
3.4 Bypass Operation
The "Bypass Operation" mode is activated by an overload or by inverter failures in all units or by a manual commutation.
•The rectifiers supply dc power only to the batteries.
•The static inverter switch SSI of the unit supplying the load opens automatically after the static bypass switch SSB is closed.
•The load is supplied directly from the mains through the static bypass.
•If the transition to "Bypass Operation" was caused by a tempo- rary overload, the UPS system returns automatically to "Normal Operation", any inverter may takeover the load, when the load returns to within tolerance.
3.5 Maintenance Bypass Operation
"Maintenance Bypass Operation" is used to supply the load directly from mains during maintenance or repair work.
•In this mode, the individual functional components of all units are completely separated from the load.
•Power for the load is supplied directly from the mains through the switch IBY.
JUE 401266 | 63 |