Network Communications News (NCN) July 2016 | Page 21
BlueFjords
influenced the decision were the strong
and well proven reputation for reliability
associated with Eaton UPSs, the double
conversion topology which provides
comprehensive power protection,
and the incorporation of two novel
and patented technologies: ESS and
HotSync.
Reliable and efficient
In order to provide the highest possible
level of resilience, two UPSs, each
rated at 275kVA, were arranged in a
redundant A+B configuration. This
means that even if one of the UPSs is out
of service – because of a fault or to allow
maintenance, for example – the other is
still capable of supplying all of the data
centre’s protected loads.
The ESS – Energy Saver System
– technology used in Power Xpert
9395P UPSs is an important advance
over conventional double conversion
UPS designs, which significantly
enhances efficiency. In standard
double conversion mode, Power Xpert
9395P UPSs already deliver efficiency
of up to 96.3 per cent but, when the
quality of the incoming mains power is
good, ESS mode boosts this to 99 per
cent. Not only does this substantially
reduce the energy required to
power the UPS, it also means that
it generates less heat. This reduces
cooling requirements and costs while
enhancing the reliability of the UPS
and prolonging its working life.
ESS mode is controlled by
advanced digital signal processing
(DSP) techniques that continuously
monitor the quality of the mains supply.
As long as the quality is good, power
is, in effect, supplied direct from the
mains to the loads, allowing maximum
efficiency to be achieved. Even when
operating in this mode, the UPS
filters power to the loads effectively
and reliably to eliminate transients.
If the UPS detects that the mains
power quality has deteriorated, it
switches to double conversion
mode in less than two
milliseconds; a transition so
fast that it is invisible to even
the most sensitive loads.
HotSync technology is
an advanced load sharing
system that guarantees safe
and reliable operation by
synchronising parallel power
modules and UPSs without
the need for a communication
link or synchronisation signals.
This means that the ‘common
PROJECT FOCUS
point of failure’ associated with
UPSs operating in parallel using
conventional techniques is eliminated,
which greatly enhances resilience.
HotSync provides outstanding
scalability for UPS installations as, to
increase capacity, additional UPSs can
be readily connected in parallel with
the existing units, with perfect load
sharing guaranteed.
In addition to the UPS systems,
Data Center Technology also supplied
the low voltage distribution switchgear
for the BlueFjords data centre. The
switchgear uses Eaton Tabula systems
and technology throughout and,
like the UPS installation, it has been
designed to allow easy expansion.
Special attention was paid when
selecting the circuit breakers to
achieve maximal availability and
ensure minimal disruption to the
system in a short circuit situation. To
reduce the effect of neutral voltage
displacement, a selection of 3-pole
and 4-pole breakers was used in
strategic positions.
The right choice
Since the commissioning of the
BlueFjords data centre, the power
systems have operated exactly as
planned. Their high efficiency is helping
BlueFjords to minimise energy costs
and the environmental impact of its
operations, while their outstanding
reliability and power protection
performance are ensuring continuity of
service and total data security for the
company’s customers.
Two UPSs, each rated at 275kVA, were
arranged in a redundant A+B configuration.
Since the commissioning of
the BlueFjords data centre, the
power systems have operated
exactly as planned.
Commenting on the success of the
project, Edvin Brun, CEO of BlueFjords,
comments, ‘Not only is Eaton a leader
in innovation, it also has top-notch
competence and excellent products
matched by an equally excellent
reputation. And it’s a great company
to work with. These factors made Eaton
an easy first choice for us at BlueFjords,
and the performance of our new data
centre continues to confirm that it was
definitely the right choice.’
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