Chloride CROSS 32A STS

The Liebert CROSS RACK Static Switch is a two-way, single phase automatic switch powered
by two independent synchronous or asynchronous AC power supply sources. The switching
devices are SCR. Under no operation conditions is simultaneous current switching between the
two sources possible (Break Before Make).
The Static Switch makes a rapid switch from one source to the other in the event of a fault to
the power supply used to power the load, or carry out tests/maintenance. In addition, Liebert
CROSS RACK is configured so that the neutral conductors may be switched. One of the two
sources can be designated as the preferred power supply, to which the Static Switch will
transfer the load. It remains there until different designations or faults require it to be switched
to the other source. The Static Switch is fitted with a manual bypass for each source to enable
correct maintenance of the system. The type of bypass switches employed by Liebert CROSS
RACK make it impossible to connect the two supplies in parallel. The Liebert CROSS RACK
Static Switch is fitted with a block diagram with LED indicators, capable of providing all
information concerning equipment operation status, which, together with the power source
priority selection button enable trained operators to make full use of the apparatus. (See Fig. 12
and para 5.1)
Furthermore, to ensure maintenance time is kept to a minimum, the entire static module (logic
and power sections) may be extracted without interrupting the supply to the load, simply by
switching the unit to manual bypass.

Hot swap capable.
Enormous MTBF failure mode of 800 thousand hours, or 33 thousand days.

Max power 32A

TECHNICAL DATA
Number of switching poles 2
Nominal Voltage (V)230 (220/240 selectable)
Input phases 1 + N
Nominal frequency (Hz) 50
Efficiency at Pn (%)>98

Overload capacity
for 10 minutes 125%
for 1 minute 150%
for 0,6 seconds 700%

Fuses 660 Vac, 100 A fast

Temperature range (°C)0 - 40
Cooling - Forced, fully redundant, front to back

Transfer ModeBreak Before Making Switching (No source overlap)
Transfer Time
source failure, worst case (msec)≤6
source failure, typical (msec)≤4
Additional transfer delay for non-synchronous transitions (msec)10 ± 2 ( 0 - 20 selectable)

DIMENSIONS AND WEIGHT
19" 2u Rackmount
700mm deep
23 Kg

ENVIRONMENT
Safety CE marking, IEC/EN 62310-1EMC Compatibility IEC/EN 62040-2, Class C
2Protection degree IP21
Acoustic Noise (dBA)<45
MTBF>800khMTTR<1

Flexibility for Customized Solutions CROSS Rack has been designed to allow the hot swapping of all the solid-state components (power and control), dramatically reducing repair times while keeping the load powered. CROSS Rack’s flexibility allows complete compatibility with customers’ load and environment requirements. Standard features include priority mode operation allowing users to select the preferred power source. CROSS Rack features a fully redundant forced ventilation system with fan failure alarm,allowing mission-critical reliability whilst taking up a minimum amount of rack space (2 HU).Front-to-back ventilation ensures perfect compatibility with state-of-the-art cooling systems for Data Centres. Leading Technology A crucial function of CROSS is the Break Before Make transfer. This ensures that the two live feeds are never connected inparallel. The CROSS static switch also ensures that switching between the two power supplies occurs safely under both synchronous and asynchronous conditions relative to input wave forms. Reliability Employing a Chloride CROSS static switch adds another layer of security for mission critical loads. Ensure a redundant power supply by enabling controlled switching between two independent AC power supply sources.Switching is performed whenever the line that supplies power to the load goes out of tolerance. The distribution downstream from a CROSS is not only protected against the failure of the sources, but also against any failure in upstream lines.