7200 Series UPS USER MANUAL
document in response to "powersure ups"
Page iv
Issue 6
(03/98)
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 voltages 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 high 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 electrical 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.
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