The sub-distributor is mounted directly in the UPS enclosure.
This allows a compact complete system to be realised with a 0.6 m2 footprint that contains rack-mounted modular UPS,
batteries and distribution. The distributor is installed in the rear area of the enclosure where the PSM busbars (installed in the racks) are attached directly to the cables using plug connectors. Twelve three-phase outlets are available on the distributor, this means a maximum of twelve racks can be supplied. In addition, 10 A circuit-breakers are integrated for each phase. These components are optimally adapted to the 12 and 20 kW N+1 UPS systems.
Application areas in 12 and 20 kW UPS The twelve-way sub-distributor is used in combination with the modular UPS. The server racks can be attached directly using plug & play technology.
Technical specifications: • 482,6 mm (19"), 6 U • 12 outlets, three-phase , 400 V/50 Hz with 10 A • 10 A circuit-breaker per phase, class C
Static Transfer Switch (STS)
The use of a static transfer switch allows "single-corded
devices" (devices that have only one power pack) to be
operated with a redundant power supply. STS has two
infeeds that are switched automatically. The switching
time is less than 5 ms. This ensures that sensitive devices
can be operated without interference. The “Break before
Make” transfer ensures that the load is not fed concurrently
from two sources.
The operating panel mounted on the housing front shows all
central functions and messages of the Static Transfer Switch.
All messages may also be evaluated with floating contacts.
The STS may optionally be supplemented with a quickchange
frame equipped with an external bypass. This
function allows the load to be switched manually onto the
mains for servicing purposes.
The optional SNMP card makes it possible for the Static
Transfer Switch STS to be integrated in a network management
system. The web server integrated in the SNMP card
provides password-protected access to the STS using a web
• STS 16 A without serial interface
• STS 16 A with serial interface
• STS 16 A with serial interface and quick change frame
• STS 20 A with serial interface and quick-change frame