Instruction manual for POWERLINE 33 series UPS
2010/06/22
www.ever.eu
37
Thermal protection
The unit is equipped with a thermal safeguard that protects it against overheating.
There are two levels of protection.
If the internal temperature approximates a critical value, then a sound is emitted and
a message is displayed on the screen. The unit remains in the current mode. If the
temperature keeps increasing, at the critical value an alert message is displayed and
the unit switches to EMERGENCY mode.
EPO
EPO (Emergency Power Off) is a mechanism that cuts off the energy supply to the
receivers at the UPS output in extreme situations (e.g. a fire). The unit switches to
EMERGENCY mode.
The mechanism can be activated in two ways:
- disconnected pins of the external EPO connector (release device),
- manual command on the interface (KONTROLA 1/4; AwaryjneWylaczenie).
The output voltage will be circuited again after the user commands to cancel the alert
flag (KONTROLA 3/4; KasujAwarieFal) and sets the release device as inactive
(normal position) - in case of the external initiation of the release.
It is possible to temporarily lock the EPO function during the assembly of the EPO
trip device. Then, the technician can remove the EPO connector without risking the
black out of the receiver devices. It may last up to 1 minute, beginning from the
setting of the control flag (CONTROL 2/4, Czas.Wyl.EPO). After that time, the lock is
automatically off.
The EPO connector pins have a safe voltage that is separate from the remaining
systems of the device.
NOTE! The EPO circuit must be a separate circuit and it is forbidden
to connect it to other systems.
MANUAL BYPASS
The unit is equipped with a manual BYPASS line switch, which enables the direct
switching of the BYPASS line to connect it to the output clips of the unit and
bypassing the unit blocks.
Figure 7: Manual BYPASS switch
Switch in the UPS position – normal operation.
Switch in the BYPASS position – BYPASS lines connected to the output clips. The
switch can be changed at any time.
