XPRT-6kVA, XPRT-10kVA USER’S MANUAL
UNINTERRUPTIBLE POWER SUPPLY (UPS)
Xtreme Power Conversion® (XPC) Corporation (Rev 2/7/13)
Page 56
On Bypass
The UPS is equipped with an automatic bypass switch. This switch automatically transfers the load to the
utility input power if the UPS is unable to deliver the demanded output power due to overload or over
temperature. If all 5 LOAD LEDs are illuminated, bypass operation is caused by an overload. If only first
runtime LED is illuminated, bypass operation is caused by over temperature.
The UPS will switch back to normal operation when the overload has been removed. When temperature
drops below alarm level unit can be switched back to normal operation. If a power failure occurs during
bypass operation, the UPS will switch to battery if possible, otherwise
output power is lost
.
On Battery
During normal operating conditions, if an input utility failure occurs, the UPS uses the energy stored in
the batteries to supply the load. The runtime capacity LED bar will show the remaining time. The UPS
will shutdown:
•
After the batteries have been discharged (automatic restart if enabled), or
•
If keypad ‘UPS OFF’ is pressed (restart via front panel required), or
•
If a ‘UPS shutdown’ command is given by the computer (via UPS monitoring software). Restart
depends on the setting of “auto-restart” function.
Battery Low (end of runtime)
If during battery operation, the buzzer starts beeping every 5 seconds and the first LED of the battery
charge bar starts blinking, the batteries are nearly discharged: the remaining runtime is less than 2
minutes (default setting, adjustable via the UPS monitoring software). Controlled shutdown of any
computer equipment is absolutely necessary when this alarm is raised.
If the UPS operates at 100% load, the shutdown procedure should be completed within 2 minutes after
the ‘battery low’ alarm started. If only part of the output capacity of the UPS is used this period can be
longer, with aged batteries this period can be shorter.
When the batteries are fully discharged, the UPS is no longer able to supply the connected equipment
and eventually
output power is lost.
