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9. EXTERNAL BATTERY CABINETS
This section describes all of Mesta’s available battery cabinets that are designed to work with a Mesta
UPS covered by this manual. Make sure to read and understand all warnings and instructions in this
section of the manual before any work is begun.
WARNING
Only qualified technicians or supervised personnel should attempt to connect/disconnect external
battery cabinets to/from the UPS models covered by this manual.
ALL
of the following
WARNINGS
and
INSTRUCTIONS
should be read and fully understood prior to undertaking this task. Otherwise,
maintenance personnel may be exposed to an electrical shock hazard that could result in death or
injury, or damage to the UPS or its electrical loads may occur.
If your system is configured with internal batteries, additional battery cabinets may be added to your
UPS to extend the backup time of your UPS. If the UPS cabinet does not have internal batteries, than
at least one battery cabinet must be incorporated into the UPS system to provide backup energy. It is
recommended that only battery cabinets supplied by Mesta Electronics be added so that complete
compatibility with your UPS can be guaranteed. Different manufacturers' battery cabinets may possibly
be used, but their use should be cleared with Mesta before doing so.
CAUTION
- not checking other
battery cabinets with Mesta Electronics may result in serious damage to the UPS and will nullify
warranty and UL compliance.
WARNING
Risk of
Electric Shock
. Do not attempt to connect/disconnect external battery cabinets to/from the
UPS unless the UPS external battery breaker and all external battery cabinet breakers are OFF.
Otherwise, maintenance personnel may be exposed to an electrical shock hazard that could result in
death or injury, or damage to the UPS or its electrical loads may occur.
WARNING
Risk of
Electric Shock
and
Fire
. The battery circuit is grounded at the UPS. Do not attempt to
additionally ground the battery circuit. Otherwise, maintenance personnel may be exposed to an
electrical shock hazard that could result in death or injury, or damage to the UPS or its electrical
loads may occur.
Available Models:
The Mesta battery cabinet model
numbers are listed in Table 7. All of the battery cabinets
are designed to mate with all UPS models covered by
this manual. The "nn" in the model numbers to the right
indicates the size of the UPS that the battery cabinet is
to be mated with. The “nn” value
must
match the UPS
rating to which it is being connected.
Location:
The auxiliary battery cabinet is designed to
be located on the left side of the UPS cabinet. This
arrangement will present the shortest distance between
the two battery breakers, and it will also provide
optimum access to the UPS if any of its cabinet panels need to be removed.
Table 7 Battery Cabinet Specifications
Cabinet
Model No.
No. of
Batteries
Amp-hour
Rating
BC20-38-nn 20
38
BC20-65-nn 20
65
BC40-38-nn 40
76
BC40-65-nn 40
130
BC60-38-nn 60
114
BC80-38-nn 80
152
BC100-38-nn 100
190