Vertiv APM 0250kMK16FN02000, Руководство пользователя

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8 Parallel System and LBS System
This chapter gives details on the installation of the parallel system and LBS system.
8.1 General
The parallel system can comprise of up to four UPS units of the same power rating and connected in parallel without the
need for a centralized mains static bypass. Instead, the bypass static switches of each UPS share the load when the system
transfers to the mains bypass supply.
From a 'power' viewpoint, each module is internally identical to the 'single module' configuration. A parallel system requires
inter-module control signals to manage the load sharing, synchronizing and bypass switching. The control signals are
connected through the parallel cables, which are multi-way ribbon cables connected between the units of the system to
form a ring.
8.2 System Installation Procedures
The basic installation procedure of a parallel system is the same as that of single module system. This section only
introduces the installation procedures specific to the parallel system. The installation of a parallel UPS should follow the
installation procedure for a single UPS module with the additional requirements detailed in this section.
8.2.1 Preliminary Checks
Be sure that the options of the parallel cables are correct, and that the modules are of the same rating, model, and with the
same software and hardware release.
W A R N IN G ! T o ach ieve co o rdin ated o peratio n o f th e m o du les in th e parallel system , it is
requ ired to co n figu re each m o du le separately u sin g Vertiv so ftware settin g. T h is m u st be do n e
by Vertiv service perso n n el.
8.2.2 Cabinet Installation
Place the UPS modules side by side and interconnect as shown in Figure 8.1 on the next page. The output distribution mode
shown in Figure 8.1 on the next page is recommended to facilitate maintenance and system testing.
8 Parallel System and LBS System
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Vertiv™ Liebert® APM Plus User Manual