G
AMATRONIC
E
LECTRONIC
I
NDUSTRIES
L
TD
.
Centric Installation Guide, rel. 2.8
47
6.1
Safety considerations
There are general principles of safety that apply to the insertion and removal of power modules. These
principles also reduce the chances of unplanned electrical disturbance to the loads.
1
.
The ideal situation is where the
Centric
can be turned off before performing the insertion or
removal of a power module.
2
.
Where it is very inconvenient to turn off the
Centric
, the next best procedure is to turn off
all loads or disconnect them from the
Centric
while the insertion or removal of the module
is in process.
3
Where it is not possible to disconnect or turn off the loads, the next best procedure is to
perform the insertion or removal of a module with the system in bypass mode.
4
.
If none of the above situations can be obtained, the insertion or removal of modules can
still be accomplished safely.
5.
If you remove a UPS module from the Centric while the module is operating, wait five
minutes before reinserting the module. This allows the module’s capacitors time to
discharge.
6.2
First-time insertion of power modules at system
installation
When the installation instructions in section 3.2 call for it, insert the power modules into the module shelf as
follows:
1.
Install the modules starting in the lowest available shelf and work your way upwards
through the available shelves.
For each module:
1.1
The UPS modules are relatively heavy – about 20 kg (44 lbs) – and difficult for one
person to handle safely.
Have two persons
lift the module and slide it into the
shelf. One person shall stand on each side of the shelf (Figure 43).
1.2
Slide the module all the way into the module shelf. Push the module inward gently
but firmly to ensure proper seating of the module’s rear connectors. Fasten the
module to the UPS frame with two screws type M5 conical, one on the left and one
on the right of the module face.
