02/02
5
Safety Procedure
WARNING
In a domestic environment, this product may cause radio interface in which case the user may be
required to take additional measures.
WARNING
HIGH EARTH LEAKAGE CURRENT: EARTH CONNECTIONS IS ESSENTIAL BEFORE CONNECTING THE
INPUT SUPPLY.
This equipment must be earthed in accordance with local electrical codes.
WARNING
THIS UPS DOES NOT INCORPORATE AUTOMATIC BACKFEED PROTECTION. A WARNING LABEL MUST
BE FITTED TO ALL EXTERNAL PRIMARY POWER ISOLATIONS STATING.
INSULATE THE UNINTERRUPTIBLE POWER SYSTEM BEFORE WORKING ON THIS CIRCUIT.
GENERAL
As with other types of high power equipment, dangerous voltages are present within the UPS and battery
enclosure. The risk of contact with these is minimised as the live component parts are housed behind a
hinged, lockable door. Further internal safety screens make the equipment protected to IP20 standards.
No risk exists to any personnel when operating the equipment in the normal manner, following the
recommended operating procedures.
All equipment maintenance and servicing procedures involve internal access and should be carried out
only by trained personnel.
BATTERIES
Battery manufacturers supply details of the necessary precautions to be observed when working on, or in
the vicinity of a large bank of battery cells. These precautions should be followed implicitly at all times.
Particular attention should be paid to the recommendations concerning local environmental conditions
and the provision of protective clothing, first-aid and fire fighting facilities
TEST EQUIPMENT
When the battery is under charge, it is earth-referenced about its mid-point –e.g. if the battery is being
charged at 460V the battery extremities will be at +230V and –230V with respect to neutral (earth).
When using mains-powered test equipment such as oscilloscopes in the UPS voltage area, always use a
differential mode of operation to avoid the need to disconnect the oscilloscope frame earth.
PERSONNEL
When working inside the UPS (trained personnel only) it is recommended that protection be worn to
prevent eye damage, should an electric arc be struck by mishandling or severe electrical fault.
Some of the power components are very heavy. If their removal is necessary, ensure that sufficient
manpower is available; otherwise use adequate mechanical handling equipment.
When working in the general area of the UPS where high voltages are present, a second person should
be standing-by to assist and summon help in case of accident.
