Instruction manual for POWERLINE 33 series UPS
2010/06/22
www.ever.eu
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The mode is switched again once overload ends to a relevant operation mode, once
the overload level is lower than the predefined limit (KONFIGURACJA 4/5;
ProgKas.Prz.).
EMERGENCY
EMERGENCY mode can be switched on due to an overload, overheating, or
EPO. The power supply unit is turned off and the power blocks do not operate. In that
mode, the BYPASS lines are connected. An exception to this is when the EPO is
active, while the BYPASS lines are disconnected.
OTHER FUNCTIONAL COMPONENTS
Protection
Overload protection
Overload (above 105%) is indicated by a continuous sound and a corresponding
message on the display.
If the overload is 105-120%, then the power supply unit will remain in the previous
mode for one minute before switching to BYPASS. If the overload exceeds 120% of
the nominal power rating, the BYPASS mode is switched on immediately. The unit
remains in BYPASS as long as the overload continues above the predefined limit
(KONFIGURACJA 4/5; ProgKas.Prz.). Once the overload discontinues, the unit
attempts to restart five times. If they fail, the unit switches to EMERGENCY mode. In
BACKUP, the overload causes the unit to switch to EMERGENCY mode without any
additional attempts to restart.
Short circuit protection
In the inverter-based modes, i.e. NORMAL, BACKUP, and HIBRID, there is an
electronic short circuit protection that, in case of a short circuit, limits the short circuit
current to its safe level. A short circuit is indicated by a corresponding message and
a quick, intermittent beep. If the short circuit lasts longer than the predefined limit
(hundreds of milliseconds), the unit switches to EMERGENCY mode.
Overcurrent switches F3 and F4 are applied in modes that use a BYPASS line.
Figure 4: Input protection
