Salicru SLC X-PERT 100, Руководство пользователя

Страница: 10 / 62

10
SALICRU
4.3. UPS NAMEPLATE.
The SLC X-PERT UPS model features a nameplate containing its
operating values. The nameplate is affixed to the inside of the
door of the UPS.
Fig. 4. Example of a nameplate for the SLC 200 X-PERT.
Verification of technical specifications.
Before carrying out any installation or startup
operations on the UPS, verify that its technical specifications
are compatible with the AC power line and output loads.
4.4. DESCRIPTION OF THE UPS.
The UPS described in this manual is on-line, double-conversion;
the inverter included in the UPS always supplies power to the
load, either with or without the availability of mains power
(according to the backup time of the batteries).
This configuration guarantees the best service to the user,
supplying clean energy in an uninterrupted way, and ensuring
voltage and frequency stabilisation at a rated value. Thanks
to its double conversion, the critical loads will be completely
immune to micro interruptions and mains variations, preventing
damage to critical loads (computers, instruments, scientific
devices, etc.).
Presence of voltage at the output.
The line connected to the UPS output is energised even
during mains failures, so, in accordance with IEC EN62040-1-2,
the installer must identify the line or sockets powered by the
UPS, alerting users of the existence of a UPS in the facility.
Mains
Mains Output
Fig. 5. Block diagram of the SLC X-PERT UPS.
The UPS uses high frequency switching IGBT technology
that allows very low distortion of the current feed back into
the supply line, as well as high-quality and stable output
voltage. The components used ensure high reliability, excellent
efficiency and ease of maintenance.
4.5. OPERATING PRINCIPLE.
4.5.1. Rectifier.
The rectifier converts three-phase AC mains voltage into
direct DC voltage. It uses a fully controlled three-phase IGBT
bridge with low harmonic absorption. The control electronics
uses a state-of-the-art 32-bit microprocessor (μP) that enables
reduction of the harmonic distortion of the current absorbed in
the mains (THDi) to less than 3%. This ensures that the rectifier
does not distort the supply network with respect to the other
loads. It also prevents cable overheating caused by circulation
of harmonic currents.
The rectifier is designed to power the inverter under full load
and also charge the batteries with the maximum recharge
current.
4.5.2. Inverter.
The inverter converts the DC voltage from the rectifier or
batteries into alternating AC voltage, stabilised in amplitude
and frequency.
The inverter uses IGBT technology in the power converter, with
3 levels for powers between 200... 400 kVA, and a switching
frequency of 7.5 kHz.
The control electronics uses a state-of-the-art 32-bit micro-
processor that, thanks to its processing capacity, generates a
perfect sine-wave output waveform.
In addition, the fully digital control of the sine-wave output
waveform provides high functionalities, including very low
voltage distortion (linear load <1%, non-linear load <5% as per
EN62040-3), even in the presence of highly distorting loads.
4.5.3. Batteries and battery charger.
The batteries must be installed outside the UPS, usually in an
external cabinet or bank.
The logic of the battery charger is fully integrated in the rectifier
control electronics.
The batteries are charged according to standard DIN41773 ,
every time they have been partially or completely discharged.
When their total capacity is restored, they disconnect from
the DC bus by means of a static switch to save energy and
reduce stress due to AC ripple, enabling their service life to