Specifications

3.1.7QUALITY SYSTEM CERTIFICATION
3.1EUROPEAN TECHNICAL
STANDARDS AND LEGISLATION
3.1.1 SAFETY
3.1.3ELECTRO-MAGNETIC COMPATIBILITY
3.1.4PERFORMANCE
3.1.5VARIOUS STANDARDS
3.1.6OPERATION OF THE UPS IN A WORK CELL
POWER SUPPLY PROBLEMS
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• REMOTE COMMUNICATION USING SIGNAL CONTACTS If
the UPS is not readily accessible to the operator,
remote signaling may be provided for remote diag-
nostic of the main operating conditions (at least
“general alarm” and “battery operation”). These
signals can be sent to the computer systems pow-
ered by the UPS, to a signal panel at the cus-
transmission of the information via a simple twin
pair connection. In some cases, it may be advis-
able to connect a UPS to the supervision system
using existing computer networks (SNMP-Simple Net-
work Management Protocol)
All UPS must bear the CE marking in compliance with
the “73/23/EEC Low Voltage” and “89/336/EEC Elec-
tromagnetic compatibility” directives (and related
amendments).
UPS compliance with other Directives (for example
those relating to construction products and the ma-
chinery directive) is not required unless specifically
requested by the customer.
CEI, CENELEC and IEC are the recognized regulatory
authorities at national, European and international
level respectively. The following nationally recog-
nized, European standards on UPS's permit confor-
mity with the Directives and therefore CE marking
- The EN 50091-1-1 (CEI 22-13) standard prescribes
the basic safety requirements for UPS accessible to
the operator;
- The EN50091-1-2 (CEI 22-16) standard regulates
UPS with limited accessibility (inside cabinets, etc.).
The UPS must operate without being affected by distur-
bances (immunity) and without disturbing (emissions)
other equipment, via electro-magnetic interference
conducted along the cables from the enclosure.
The EN 50091-2 (CEI 22-9) standard refers to the
related prescriptions and test procedures.
The ENV50091-3 (CEI 22-14) draft standard is intended
to promote improved understanding between the
manufacturer and customer through adequate descrip-
tion of performance and related test methods.
Other standards relating to UPS installation are:
- HD384/IEC364 (CEI 64-8) for electrical installa-
tions in general;
- the CEI 11-20 standard for systems with UPS con-
nected to networks of class I and II;
- the EN 60439-1/IEC439-1 (CEI 17-13) standard on
control equipment;
- the EN60529/IEC529 (CEI 70-1) standard on the
protection rating of enclosures;
- the EN50272-2 standard (soon to replace the CEI
21-6/3 standard) for the installation of batteries.
According to the interpretation sheet F10/CEI 64-8
relating to operation of UPS's in a work cell, when a
UPS is connected to ground in a TT or TN arrange-
ment, the opening of a protection or of a circuit
breaker upstream of the UPS causes temporary modi-
by the opening of a protection ahead of the UPS,
this will not function in a cell as there are no
changes to the neutral arrangements. In this case,
operation is battery-powered. As a result, when the
UPS operates temporarily in a cell, the protections
established for the IT system need not be provided.
fication of the method by which the neutral (iso-
lated neutral) is connected to ground.
Application of the provisions of Articles 413.1.5.1
and 413.1.5.4 of the above-mentioned CEI 64-8
specification is not necessary as it is unlikely that a
second fault will occur after the first fault during
the time the back-up power supply is operating.
However, in the case of a mains failure not caused
by the opening of a protection ahead of the UPS,
this will not function in a cell as there are no
changes to the neutral arrangements. In this case,
operation is battery-powered. As a result, when the
UPS operates temporarily in a cell, the protections
established for the IT system need not be provided.
UPS manufacturers can provide a quality certificate
in relation to the organization, procedures, meth-
ods and resources via which they implement an ef-
fective quality policy.
Compliance with the UNI EN ISO 9000 standards is
certified and constantly verified by external accred-
ited organisms and is guaranteed to customers, end
users, suppliers and other organizations by way of
the Quality System