G
AMATRONIC
E
LECTRONIC
I
NDUSTRIES
L
TD
.
CENTRIC 3x480, User Guide, rel. 1.7
7
2.3
System controller
The
Centric
system controller has three purposes:
•
Controls and monitors the operation of the
Centric
according to the user's commands.
•
Collects and summarizes data from all sections of the UPS.
•
Manages communication with external computers for data transfer and operation.
The
Centric
can operate without the system controller but with reduced functionality.
2.4
UPS module (30 kVA / 30 kW)
The UPS module is the core of the
Centric
, which consists of from one to eight identical internal modules
operating in parallel. The number of UPS modules installed in the cabinet is fixed at the time of
manufacture and depends on the user's capacity requirements.
Each UPS module includes a 3-phase charger with PFC (power factor correction) and a 3-phase PWM
(pulse-width modulation) inverter connected to batteries by a classic dc link.
2.5
Static switch module
The centralized, electronic static switch enables an automatic transfer of the load from the output of the
inverters to an alternate source – the ac mains, for example – when the inverter is unable to supply
sufficient power to the load (for example, in the event of an overload, or an inverter failure). The static
switch transfers high currents at very high speed; a typical transfer time is less than 3 ms.
2.6
Battery
The
Centric
battery bank provides backup power to the UPS and its load devices in the event that the
utility ac input fails. The batteries are housed in an external cabinet adjacent to the
Centric
. The batteries
are charged by the rectifier that supplies both the inverter and the battery charger.
The Centric supports the use of standard lead-acid batteries, and also lithium-ion batteries.
If you plan to
use lithium-ion batteries, consult with your dealer
to be sure that the battery setup parameter values
are appropriate for the batteries you will be using.
The battery cabinet should be installed as close to the UPS as is practically possible.
Fast-acting fuses (semiconductor fuses) must be used between the battery and the UPS.
Protect the batteries from moisture, dampness, and foreign substances.
The temperature of the battery's surroundings influences the batteries' useful lifetime.
Table 3: Battery lifetime vs. environmental temperature as per Eurobat
E
NVIRONMENTAL
TEMPERATURE
A
CHIEVABLE PERCENTAGE OF
BATTERY
'
S RATED LIFETIME
20 °C
100 %
30 °C
50 %
40 °C
20 %
