Specifications

Always On UPS Systems
3.4. Site & Environment Consideration
The designed function of the bypass cabinet is to allow the UPS system to be shutdown and
removed from the circuit without power interruption to the load.
Usually the life expectancy of the Bypass system is 8 to 10 years. The optimal life expectancy of
the Bypass system can be achieved by careful consideration of the site and environment.
The following precautions and recommendations should be checked when considering the site
and environment for the bypass:
a. The bypass should be located in a place with adequate ventilation (refer to the
specification of the heat dissipation of the bypass). Should the Bypass be installed in a
sealed room, care must be taken to ensure adequate heat evacuation is provided.
b. Void space is not required on all sides of the bypass system, but adequate space, a
minimum of 1m (3’), should be allowed at the front for the door to open and a minimum of
60cm (2’) should be allowed on the right side to allow for the door to open and removal of
the side panels for operation or maintenance purposes. Adequate space, a minimum of
60cm (2’) [recommended 1m (3’)], should also be allowed at the top of the bypass system to
allow for proper heat dissipation and ventilated through the top openings (optional ventilation
booth is available upon request).
c. Do not place any objects on the top of the bypass that might obscure the ventilation. Do
not place the bypass near any heat source, or machinery, which may produce metallic
particles, dust or powder. Do not place the bypass near equipment that will produce
corrosive substances or vapor.
d. Do not place the bypass below the shower of a fire extinguishing system (optional drip
shield available). Abnormal conditions of the bypass should be protected by a cutoff from
the power supply.
e. The user is required to guarantee the temperature and humidity values of the site into
which the bypass will be installed, meet the required and published manufacturer
specifications. The bypass should be installed within the range allowed by these
specifications. The bypass is capable of continuous normal operation within a temperature
range of 0°C (32°F) to 40°C (104°F). For optimal performance and reliability the
recommended environment temperature is best at 25°C, with humidity < 80% non-
condensing.
f. The floor loading capacity should be sufficient to endure the weight of the UPS, bypass
and battery bank.
g. Walls, ceilings, floors or anything near to the bypass should be constructed of non-
combustible materials. A portable fire extinguisher should be accessible nearby.
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