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IP Power Strips
Switched CDU
8H
Switched CDU
16V
Switched CDU
24V
Switched CDU
32V
Sentry
Power Tower XL
Sentry
Power Tower XM
Sentry
Power Tower XL Fail-Safe
Serial Power Strips
Sentry
Serial Power Tower
Metered Power Strips
Metered
CDU C-24H2
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Server
Tech Sentry Power Tower XL Fail-Safe
The Sentry Power Tower XL (PTXL) Fail-Safe™ provides fail-over
redundancy to single or dual-power supply servers and network devices.
Exclusive to the Power Tower XL Fail-Safe is its ability to carry
loads on the A circuit, B circuit or both and to remotely manage the
outlets.
Similar, but unlike a common automatic transfer switch, the Power
Tower XL Fail-Safe unit is unique in that it contains two (2) in-feeds
and two (2) banks of eight (8) outlets each, for a total of 16 outlets
across the two circuits.
The Power Tower XL Fails Safe's “A” in-feed routinely
powers just the A1-8 outlets, and the “B” in-feed routinely
powers just the B1-8 outlets. However, if the “A” in-feed
goes down, the “B” in-feed powers all 16 outlets and the
same if the “B” in-feed goes down, The transfer occurs
in fewer than 18 milliseconds, which is faster than the interruption
rate of the attached equipment.
This new “Fail-Safe” method has several advantages compared
to a standard ATS because it does not prohibit load balancing between
the two supplied circuits. A standard ATS contains two-in-feeds, but
runs all outlets from just one source, with the secondary source only
being used once an outage occurs on the capacity. This results in
less heat, less resistance, and consequently less of a voltage drop
compared to the same load existing on just one source. Only when an
outage occurs on one of the two sources will the entire load be applied
to a single source.
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