Tecnoware Power Systems
EVO STAR 10-50
11
3
GENERAL DESCRIPTION
3.1
OPERATING PRINCIPAL
The U.P.S. is a continuous double conversion system with an output transformer. It works
by carrying out a continuous double conversion of the main supply, guaranteeing a constant
stablized supply of both voltage and frequency, maintaining charge and control of the batteries
(On-line functioning). In order to guarantee continuous supply when the voltage of the electric
system are no longer correct, power is drawn from the batteries. The system is supplied
complete with an automatic static commutator that connects the output to the back-up power
supply, or if there are special alarms such as the E.P.O. (Emergency Power Off) it shuts down
completely output voltage.
3.1 DESCRIPTION AND PARTS
During normal functioning (picture 5) the system takes power from the mains by means of the input terminal (1).
The voltage goes through the disconnecting switch (point 4) and the fuse board (point 6/a) in order to reach the rectifier
module (point 7), exiting which is a continuous controlled voltage available to charge or maintain battery efficiency
through the fuse (6/b) and the “battery disconnecting switch” (point 8) and to the inverter input (11). This step is to
generate a three-phase voltage, stabilized and synchronized with the back-up voltage. The static commutator (11) selects
the power source to power the load, usually on inverter (10). If there is an increase of output current or with specific
alarms, the device (12) will commutate to the emergency supply (7) maintaining output continuity. If transferring takes
place, output continuity is allowed by the synchronism of the voltages generated with the emergency voltage. If
asynchronous commutation should take place there will be a power “dip” for maximum 20 ms.
When the power supply is not in the set parameters, the equipment maintains output voltage by taking power from the
batteries (picture 9). The system is provided with a current control that keeps the current inside set parameters in the
event of current overloaded.
4
3
2
5
6/a
7
6/b
1
10
8
9
11
12
13
Emergency network
(optional)
Linea di by-pass
1.
Main voltage
2.
Manual By-pass
3.
Disconnecting
switch back-up line
4.
Disconnecting
switch main
5.
Back-up network
fuse board
6.
Fuse board
a) Main input
b) Battery
7.
Rectifier
8.
Battery switch
9.
Battery
10. Inverter
11. Static
commutator
12. System output
disconnector
13. Exit
Picture 5
1/A
RECT.
INV.
B.M.
B.S.
BAT
T
.