Apc SILCON 990-4053 User Manual download pdf (Page 14)

14 Installation Guide APC Silcon 480kW 400V UPS

990-4053

External Connection

The built-in parallel board connects two or more UPS systems in parallel, either to obtain

increased system reliability or to obtain higher output power. The parallel board also ensures

correct load-sharing between paralled systems.

To prepare the UPS for parallel/redundant mode, disconnect all sources of AC and DC power

supply to the UPS and connect the ribbon cable from the parallel board to the main controller

board (the ribbon cable is delivered with the UPS).

Complete the parallel system set-up by connecting the external control cables (see below).

Follow the instructions in the “Programming Parameters for Advanced Parallel” section of this

guide to execute necessary re-programming.

NOTICE!

For reliability reasons, APC recommends separate battery packs in redundant/parallel

conigurations.

CAUTION!

DO NOT connect ribbon cable between controller and parallel card in single configurations.

Ribbon cable is for parallel operation only.

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Apc SILCON 990-4053 User Manual Page 14