Powerware Uninterruptible Power Supply SOLA 4000 - Manual (Page 65)

SOLA 4000 - Operation
JUE 401266 65
4.3 Battery Operation
The "Battery Operation" mode is activated by a mains failure or
rectifier failure
• The rectifiers supply no power
• The batteries supply the required d.c. power to the inverters
• The inverters supply a.c. power to the load as described in 4.1
• Power will only be supplied to the load for a certain period of
time depending on the battery capacity
• If there were stand-by units switched off at the time of the
mains failure, all units will automatically switch ON in order to
extend the battery autonomy time.
4.4 Operation with an Inverter Failure
This operating mode is activated by a failure in one or more invert-
ers.
• As long as the load is not too great for the remaining units, the
parallel system will stay in UPS (inverter) operation mode,
otherwise see 4.5.
• The static inverter-switch(es) (SSI) of the defective unit(s) will
open automatically, separating them from the load-busbar
• The rectifier(s) of the defective unit(s) will supply d.c. power to
the battery (batteries) only if the respective rectifier is not
defective.
4 Operating Modes Parallel and Parallel/Redundant
Operation