13
SALICRU
3.3. Operating
principle.
This manual describes the installation and operating of the Un-
interruptible Power Supply (UPS) from
SLC TWIN RT series
,
as equipments that can work as a single units or connected in
parallel with a maximum of two units (equipments higher than 3
kVA only).
UPS from
SLC TWIN RT
series assures a maximum protection
of any critical load, keeping the power supply voltage to the loads
between the stated parameters, with no break, when a failure,
fluctuation or deterioration happen in the electrical commercial
mains and with wide range of available models (from 0,7 kVA to
10 kVA) and allow adapting the model to the end-user needs.
Thanks to the used technology, PWM (pulse width modulation)
and the double conversion, the UPSs from
SLC TWIN RT
series
are compact, cold, silent and with high efficiency.
The double converter principle cancels any perturbation of the
energy mains fluctuations. A rectifier converts the AC alternating
current from mains into DC direct current, which keeps both the
optimal battery charge level and supplies the inverter that at the
same time generates a sinewave AC alternating voltage ready
to supply the loads permanently. In case of input mains power
supply fault, the batteries supply clean energy to the inverter.
The design and UPS construction from
SLC TWIN RT
series
have been done in accordance with the international standards.
In models up to 3 kVA, there are available IEC outlets associated
to configure groups by means of the control -LS1 and LS2-. At
higher power models available automatic protections per each
outlet group and also they have terminals to make the corre-
sponding power connection.
The complete series has connectors for USB and RS232 ports
and EPO too for an external installation by the end-user of a an
emergency button, as an option. In the models from 0,7 to 3 kVA
it is supplied a dry contact to install a remote start up and shut-
down of the equipment (Dry-in), as well as an auxiliary contact as
an alarm (Dry-out).
As an option, inside the smart slot, one of the following com-
munication cards can be inserted: AS-400 interface, SNMP for
controlling the equipment via Web or card for Internet or Intranet
managing.
Models from 4 to 10 kVA, allow the parallel connection of a second
equipment of the same features for a redundant configuration or
to increase the available power. This connection can be done at
any time and it does not condition the acquisition of itself. Like-
wise, this power range has manual bypass.
It is possible to increase the standard back up time of the equip-
ment by connecting additional battery modules. In order to optimise
the recharging time of the batteries, there are equipments that in-
corporate battery chargers with higher quality performances (B1).
This option (B1) is not available for power rates higher than 3 kVA.
The flexibility of this series to manage a wide range of IT devices,
it makes the best option to protect your LAN, servers, worksta-
tions and other electrical devices, and to ensure that your busi-
ness is protected against fluctuations of voltage, frequency,
electrical noises, blackouts and mains faults, which are present
in the energy distribution lines.
This manual is applicable to the standardised models stated in
table 2.
3.3.1. Main
features.
Ŗ
True on-line with double conversion technology and output
frequency independent from mains.
Ŗ
Output power factor 0,9 and pure sinewave, suitable for al-
most any kind of loads.
Ŗ
Input power factor > 0,99 and high general efficiency (be-
tween 0,87 and 0,9 for models 0,7 to 3 kVA and > 0,93 for
higher power rates). It is obtained both a higher energy
saving and lower cost of installation to the end-user (wiring),
as well as low input current distortion, therefore the pollution
in the power supply is minimised.
Ŗ
High adaptability to the worst conditions of the input mains.
Wide input voltage range, frequency range and wave shape,
so it is avoided the excessive dependence of the limited en-
ergy of the battery.
Ŗ
Availability of the extended back up times, by adding addi-
tional battery modules.
Ŗ
Possibility to connect two equipments in parallel (models with
power rate higher than 3 kVA only).
Ŗ
High efficiency mode > 0,95 selectable (ECO-MODE). En-
ergy saving, which revert to the user in an economic way.
Ŗ
Possibility to start up the equipment without mains or bat-
tery discharged. Be careful with the last aspect, because the
back up time will be decreased as much they are discharged.
Ŗ
The technology of smart battery management is very useful
to extend the battery lifetime and to optimise the recharging
time.
Ŗ
Standard communication options through RS-232 or USB
ports.
Ŗ
Remote emergency power off control (EPO).
Ŗ
Control signal of remote emergency power off (EPO).
Ŗ
Interface between user and equipment through the control
panel LCD screen and led indicators, friendly use.
Ŗ
Available option connectivity cards to improve the communi-
cation capacity.
Ŗ
Firmware updating in an easy way, without needing the Ser-
vice and Technical Support (
S.T.S.
).
Ŗ
Simplified maintenance, which allows replacing the batteries
in a secure way without shutdown the UPS.
Ŗ
Installation of the rack or tower equipment, with adaptable
control panel (horizontal or vertical) to the required installa-
tion mode.
