Parallel Operation (Option) - Eaton ON-LINE Series Manual

2.6 Parallel operation (option)

1. Redundancy
N+X is currently the most reliable structure in power protection. N represents the
minimum number of the UPS blocks of the UPS system that the total load needs; X
represents the number of the redundant UPS blocks of the UPS system, i.e. the number of
the fault UPS block that the system can handle simultaneously. The bigger X is, the higher
the system reliability is. For occasions where reliability is highly depended on, N+X is the
optimal mode.
The UPS system can be configured with up to three UPS blocks. Use the parallel cables to
connect the parallel UPS with each other to realize power redundancy.
2. Connection
The parallel function is optional and customers should purchase the necessory accesories
(including the parallel cables and parallel cards), then the customer service engineers will
help install them. It is up to three sets of UPS for parallel operation and the UPS operation
in parallel have been designed for use with separate batteries.
A). Remove the parallel card cover and connect the UPSs with each other by the cables:
connect the parallel cards of the UPSs by the cables and the UPSs can communicate with
each other via the cards.
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