Salicru SLC Link Series Service Manual Download

Page: 75 / 141

- 10 -

4.- INTRODUCTION AND SINGLE LINE DIAGRAM.

• The

UPS SLC Link

series is a double conversion On-line type (AC-DC and DC-AC), with an output sinewave that gives a complete

safety protection under extreme conditions of the electrical supply (voltage and frequency fluctuations, electrical noises, mains fault
and blackouts, etc...). Whichever it is the load type to protect, these equipments are ready to assure the quality and continuity in the
electrical supply. Their communication possibilities allow it to be integrated in an IT, industrial or telecommunications environments.

• The double filtering of input-output and its hermetic structure allow them to supply loads with total safety against electrical

perturbations. Basically their operation is as follows:

A rectifier with an active power factor corrector (PFC) converts the AC voltage of the mains into a regulated DC voltage, capable
to feed the inverter permanently, by absorbing a sinewave current from the mains. It makes that the input current is smaller
because there is not any harmonic. This converter boosts the battery voltage when the mains is not available or out of range.

The charger with PWM technology and charging curve I/U, is the responsible one of maintaining the batteries at good level of charge.

The Pb-Ca batteries, sealed and maintenance free, are in charge of storing the energy given by the charger, to replace the
mains in its defect. As more sensitive element inside the robustness, they are taken care in all their aspects:
- Battery charging according to the temperature.
- Protection against deep discharges.
- Control of the aging through automatic tests.
- Far location from heat sources.
- Optimised charger to shorten the times of recharge in equipments with long back up time.

The energy coming from the rectifier or the batteries is converted from direct current to alternating current by the inverter,
which is supplying one side of the Automatic Bypass. The other side of the Automatic Bypass is coming from the mains
directly. A simple change, on the microprocessor order to the Bypass, will be enough to obtain the relief from inverter to
Bypass and vice versa without transfer time.

• The input frequency is automatically auto-sensed, once the equipment is connected to the mains.

• You can opt for presentations cases in «tower» or 19"rack (R) (equipments up to 6 kVA only) types and/or to increase the back

up time by connecting additional battery modules to the

UPS

through the foreseen connector.

• The

UPS SLC Link

series is designed to give solution to almost all installation types both if the mains is single or three phase

(it is indispensable the neutral, if you don’t have it, it will be necessary to generate it somehow), and the input and output
values voltages of the equipment. This is achieved by adding autotransformers in order to adapt the input and/or output
voltages, or with isolation transformers to get the galvanic isolation.
In equipments with presentation case «tower» type, those output components are given integrated in the same equipment
case and those ones at the input in a second independent case. Conceptually the models in rack (R version) as they are fitted
in a reduced space, anyone of these solutions will be made in an external rack.

• The

UPS

is supplied with:

Input and battery circuit breaker protections.

Terminals for connection to the mains and loads.

An integrated Maintenance Bypass Switch, which allows to select to supply the loads either from the output of the equip-
ment or from the commercial electrical mains.

Two communication ports (RS-232 and USB) with its monitoring software «UPSMON» and the connection cable to be used
between the equipment and the computer. Thanks to it, it is obtained an intelligent operation that provides a perfect
protection of the critical loads.

Two RJ-45 connectors, for ETHERNET network protection against transient voltages.

Terminal strip of two pins, for the REPO (Remote Emergency Power Off).

• It is possible to have as an option in the equipment, two interface electronic boards or cards. A SNMP/WEB card for the

management and supervision through an IT network or internet and a 5-dry contact AS/400 card with dry contacts (relay
interface), but not both options at the same time.