Eaton 93E UPS 15-80 kVA (380/400/415 V) Installation and Operation Manual
© Eaton Corporation plc 2015. All rights reserved. Revision: 001
Document ID: 614-01975-00
67 (133)
NOTE: Module output breakers (MOBs) allow the output of a UPS to
be disconnected from other UPSs and the system load for
maintenance and service. Design considerations assume that each
UPS has a module output breaker (MOB). The breaker should also
disconnect the neutral for improved safety during maintenance.
The MOB must have at least one normally open (N.O.) and one
normally closed (N.C.) contact. These contacts must not share a
common terminal. The N.C. contact is connected to the corresponding
UPS’s input used for signal input. The N.O. contact is used to
disconnect the bypass pull-chain when the MOB is open. Figure 24 and
Figure 25 show the principles of paralleled UPS systems including
MOBs and outputs from UPSs.
3. To locate the appropriate terminals and review the wiring and
termination requirements, see Section 4.3.3, Table 9, Figure 20,
Figure 22, and Figure 26.
Figure 26.Pull chain terminal block connector assignments
Table 9. Pull chain connections
Output: Backup control for parallel
operation.
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