20
MASTERYS BC
100-120 kVA - Ref.: IOMMASBCXX07-EN 05
2. UNPACKING AND INSTALLATION OF THE UNIT
2.10. UPS PARALLEL CONFIGURATION
• Parallel connection enhances UPS system reliability, performance and power.
• Operating UPSs are connected to each other by a signal cable
B
(Fig. 2.10.1-1) which provides a maximum distance between
UPSs of approx. 3 metres and enables the external battery cabinet to be inserted next to each UPS. They are confi gured diff er-
ently depending on the position they are assigned; for this reason the units have a position label:
- the LEFT label means the unit must be positioned to the left.
- the RIGHT label means the unit must be positioned to the right.
• The power supply of each UPS must be equipped with a protection device as shown in the table in paragraph 2.5.
•
The cross section and length of the input and output cables must be identical for all units.
• Phase rotation must be the same for each unit connected in parallel and also on any external manual bypass line.
• Cables of the same length and cross section must be used for the connection between the general power switch
A
, the switches
C
and the respective UPS units. The length of the cables from
A
to each UPS module must not exceed 25 metres (Fig. 2.10.1-1).
• The cables from the UPS module to switch D must be of the same length (max. 20 m with multi-core cables).
• If a diff erential switch is installed on the mains power switch, it must be inserted upstream from the distribution panel; it must be
a selective type and the trigger value
must be 0.5 A multiplied by the number of UPSs connected in parallel
.
Only activate switch D after turning off the UPS.
• In order for units connected in a parallel confi guration to operate correctly, control cables are required to exchange data between
both UPS units making up the parallel system. The cables in question are supplied with the UPS in the case of a standard paral-
lel setup or are attached to the parallel kit in the case of a later system upgrade.
WARNING!
Parallel configuration must only be activated by SOCOMEC qualified personnel.
Summary of Contents for Masterys BC
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