OnLine Power Power Wave 4 - Manual (Page 15)

6005-145 Rev. A 1-4
Maintenance Bypass Mode:
In case of ELI maintenance or battery replacement, and where the load cannot
be interrupted, the user can turn off the inverter, close the bypass breaker and
then open the rectifier and reserve breakers. The AC output will not be
interrupted during manual bypass transfer procedure. Therefore, the
maintenance bypass switch keeps continuously supplying power to the load.
Electricity will not exist in ELI except the output transformer, thus ensuring
the safety of service personnel.
Generally, the ELI is expected to run 24 Hours a day in normal operation mode
once it is installed, except when the utility power fails, under overload
conditions, or during maintenance.
Normal operation with batteries connected provides clean, stable, regulated and
uninterrupted power to the load, free from any spikes and surges. Therefore,
the ELI can be regarded as a perfect AC power source, limited in back-up time,
under mains failure, only by the capacity of the batteries.
Green Mode:
Hybrid design allows customer to select this operation mode for higher
efficiency (fast transfer less than 2ms).