User guide

60
1. Always powered
2. Powered from the mains
3. Emergency only
4. Always powered/Emergency only
Diagrams of the various system solutions
OPTIONS
• Communication interfaces: see accessories table for
individual models
• Isolation transformers
• Second outlet emergency only.
CHARACTERISTICS
• full microprocessor control: for greater reliability and
compactness in size
• use of Isolated Gate Bipolar Transistors (IGBT) technology
– used in UPS for over 10 years to optimise performance
(such as overloads) and reduce physical sizes
• advanced communication interface – the units come
with a volt-free contact interface and RS232/485
serial interface for communication with a local PC or
computer network
• TeleNetGuard remote support service compatible for
remote diagnostics and control
• front panel LCD to display operating status, alarms,
measurements and logs
• option to expand the power and/or reliability through
the parallel connection of units – 8kVA models and
higher.
ADVANCED COMMUNICATION
• PowerShield² supervision and shut-down software for
the following operating systems: Windows 95, 98, NT
4.0 including work station, Me, 2000, 2003, XP, Linux,
Novell, Mac OS 9.x, X, Linux, Novell.
A full range of CSS units, from 700VA to 200kVA.
The Dialog CSS range units are comprised of the
following blocks:
Rectifier: converts the alternating voltage input
from the mains power supply or from an alternative
source (generator) into direct current voltage.
Inverter: converts the direct current voltage
supplied by the rectifier into alternating voltage:
in this way the voltage is reconstructed, filtered and
stabilised with regard to the input voltage.
By-pass: this allows switching between the
inverter and the mains power supply. In “always pow-
ered” operating mode the CSS load is always powered
from the inverter and is only switched onto the mains via
the by-pass circuit in the event of a failure. In “powered
from the mains” mode, the load is powered and only
switched onto the inverter when there is no power from
the mains. In “emergency only” mode the load is only
powered from the inverter in the event of a mains power
failure. To deal with the current surges required by the
powered loads at switching-on time, a Soft Start inverter
has been implemented in order to limit the value of cur-
rent required. In “always powered/emergency only”
two outputs can be used: one always powered (such as
for powering computer loads) and one that is only pow-
ered when there is no power from the mains (such as
for powering emergency lights that by law must switch
on within a maximum time of 0.5 seconds from a mains
failure).
Batteries: used to feed the inverter output for the
legally required time of 3 hours (if there is no generator).
The batteries used are generally valve-regulated, lead-
acid type, and do not require maintenance or a special
installation room as they have very low gas emissions.
Compliance with Legislation
The Dialog CSS range complies with the relevant European
regulations (and national guidelines still in force in some
countries) governing such applications.