GAMATRONIC ELECTRONIC INDUSTRIES LTD.
+
SA: 20, 30 and 40 kVA, Release 2.1
3
1.2 System controller
The Power
+
SA system controller has multiple purposes:
• To allow the user to manage and control the UPS.
• To monitor the parameters of all sections of the Power
+
SA via the control
panel.
• To collect and summarize data from all sections of the UPS.
• To communicate with external computers for data transfer and operation.
The POWER
+
can operate without the system controller but with reduced functionality.
1.3 Inverter boards and rectifier boards
The rectifier and inverter boards are the core of the POWER+ SA. Each rectifier board works
together with an inverter board to contribute 10 kVA to the P
OWER+ SA output. The
P
OWER+ SA will have three or four sets of rectifier and inverter boards, depending on the
maximum output capacity (20 kVA, 30 kVA, or 40 kVA).
Typically, there will be one more set of inverter and rectifier boards in the UPS than is
necessary to support the maximum load. This is called "N+1 redundancy". In the event of a
problem with any of the sets of rectifier and inverter boards, N+1 redundancy enables the
P
OWER+ SA to continue supplying the load without interruption.
1.4 Static Switch (ST/SW)
The centralized hybrid Static Switch enables an automatic transfer of the load from the
output of the inverters to an alternate source whenever the inverter can no longer supply
power to the load. The static switch can transfer high currents at high speed.
1.5 Battery
The POWER+ SA battery bank is used as a backup in the event that the utility ac input fails.
The battery bank is housed in an external cabinet alongside the P
OWER+ SA. Batteries
should always be located next to the UPS.
Batteries are charged by the rectifier which supplies both the inverter and the battery
charger.
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