If you are installing a customer-supplied battery system, install the battery system
according to the battery and battery system manufacturer’s instructions and all
the applicable national codes and regulations. Only qualified personnel may
install the battery system. Battery cables must be protected against current and
thermal overload, that is, the battery system must include proper fuses or breaker
with protection function. Ground the external battery cabinet to the UPS.
The default battery settings of the UPS are for 12 V VRLA batteries. If you need
to use any other type of batteries, contact your Eaton representative. For the
battery specification, see
Section 9.6 Battery specification
5.3.1
Battery trip wiring
The 91PS/93PS UPS units are always equipped with an internal battery breaker,
which affects only the UPS internal batteries. The external battery breaker is a
crucial part of the external battery cabinet or rack and must be placed in it. With
the external battery breaker, signal cabling is important.
Both internal and external battery breakers can be tripped (switched off) by
energizing its shunt trip coil. The shunt trip coils of external battery breakers are
energized (controlled) through connectors TB20 and TB21 (TB21 available only
in the separate battery 30/40 kW frame). The voltage of the shunt trip coil is 24
Vdc.
Figure 18: Battery trip wiring, TB20
© Eaton Corporation plc 2020. All rights reserved.
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Document ID: P-164000493
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Eaton 91PS/93PS UPS 8–40 kW
User’s and Installation Guide