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by keeping a minimum number of PCUs
near full load and putting the rest on
standby with the ability to respond quickly
to changing load conditions.
Because it eliminates the need for large
copper runs and offers the reliability and
scalability inherent in DC power, the
NetSure
™
ITM is ideal for a variety of
data center applications, including:
Sites with an existing constrained
power infrastructure or problems
with harmonics
Data centers seeking to optimize
efficiency and availability while
establishing a path for growth by
using DC power in concert with
existing AC systems
Modular or pre-configured data
center layouts
High-density scalable blade deployments
Conclusion
Direct current is already a fundamental
part of your IT infrastructure: critical loads
consume DC power and all backup sources
generate it. Furthermore, the electric grid
distributes AC power. So, the question
becomes, where is the optimal point at
which to convert AC to DC power while
providing suitable protection from outages?
If the conversion occurs too early,
DC power must be transported long
distances, which requires large conductors
to reduce losses. If it occurs too late, addi-
tional conversions are introduced into the
process which may compromise efficiency
and reliability and increase costs.
In many applications, the ideal point for
power conversion and energy storage is as
close as possible to the load. A row-based,
48V DC UPS allows for optimal efficiency,
reliability and flexibility in these data
center environments.
The NetSure
™
ITM from Emerson Network
Power, combined with the availability of
DC-powered IT equipment from major
manufacturers, makes 48V DC power a
practical, efficient and cost-effective
solution for managing the conversion
from AC grid power to DC power required
by IT equipment.
The simplicity, efficiency and reliability
inherent in the NetSure
™
ITM system can
reduce complexity and costs in a variety
of applications and should be seriously
considered for mid-size data centers and
facilities with increasing capacity needs.
References
[1] “Reliability Field Data of
Power Systems.” NTT Facilities.
INTELEC 2007.
[2] “Quantitative Efficiency Analysis of
Power Distribution Configurations for
Data Centers.” The Green Grid. 2008.
[3] Pratt, Annabelle et al. “Evaluation of
400 VDC Distribution in Telco and
Data Centers to Improve Energy
Efficiency.” Intel. 2007.
[4] “Phase Balancing: The Last Few Inches
of a High-Efficiency Power System.”
Server Technology. 2010.