Chloride Trinergy: Reliable and Efiicinet UPS

In October 2009 Chloride has presented its new Trinergy UPS system designed for data centers
with a claimed maximum efficiency of up to 99 percent.

Trinergy's name stems from its ability to work in three different topologies. In addition to normal
Online Double Conversion mode, and the Standby Eco-mode, the Trinergy UPS works also in a
new mode which enables its Inverter to correct Mains voltage by operating as an active filter
rendering features found in Online UPS systems. Trinergy UPS is able to select automatically,
based on Mains and Load condition the preferred mode to achieve both power protection and
maximum efficiency.

In Online Double Conversion regime, the Power is processed via the Rectifier - Inverter Route,
solving all Power disturbances. Trinergy's full-load Online Efficiency in this regime is 95% at full
load. This however, is reduced according to Chloride, when practical load and environment is
applied to 92.5%.

In the Eco mode, the UPS provides unprotected power through the By Pass Route, which
connects the mains input directly to the load. In this mode the Trinergy can supply according to
Chloride ideally 99% efficiency. Practically however, the total efficiency of the UPS if Eco mode
is selected , drops to 94.9% due to upside stream current harmonic losses generated by non
linear loads, and the need to work partial time in Online mode to protect the load from
irregularities and transients of the public mains power.

The Trinergy includes a new power processing route which grants outstanding results. By
inserting a series power Inductance (choke) between input Mains Power and inverter's output a
power conditioned operational mode can be achieved. Here power is supplied from Mains to the
load, through the choke, while the inverter acts as an active filter to provide conditioned clean
and transient free voltages to load and absorb the current harmonics stemming from nonlinear
load characteristic, thus eliminating the upstream power losses. In this operational mode
efficiencies of 96% to 98% are achievable.

UPS control circuits in Trinergy, monitor continuously Mains and Load behavior to select
automatically the best working mode in a given situation, for achieving both Power Protection
and the lowest power waste. The said type of operation renders according to chloride practically
97.9% efficiency.

Each UPS comprises basic 200kVA modules. From two to six modules can be paralleled for
redundancy or power scaling to form up to 1.2Mwatt UPS. The UPS's can be additionally
paralleled for scalability up to 9.6Mwatt.

The modular scalable approach enables initial investment in line with short term requirements,
allowing subsequently increasing the number of systems when power grows.

To decrease power losses, in case of relatively light loading of Parallel systems, a unique feature
enables turning off automatically, UPS systems which are not required for feeding the load or
keeping redundancy protection.

Chloride does present an interesting solution for Economic power conditioning. Even if in
certain cases the stated efficiency gain cannot be achieved, big money is saved on UPS power
and associated cooling losses in high power installations.

We have examined in our September 2009 Newsletter how new Server's standards affect UPS
efficiency requirements, indicating that with current UPS Online efficiencies, of about 95%, any
improvement is marginal in relation to the total data center's running losses. The user will
probably weigh the possible running cost gains provided by Trinergy versus the possible
reduction in system's reliability compared to online operation.

It is hard to guess how the market will respond to a new architecture. Any innovative small step
for the manufacturer can lead to a giant leap for the Industry. It happened with the introduction
of PWM wave forming, the transformer-less UPS, Power Factor Correction, Modular UPS
systems and Line interactive operation.

No innovation that made a change was accepted with open arms, each one had to overcome the
rejection of Professional Mavens.

This Article is based on our October 2009 Newsletter. Remarks and Chloride's answers to
readers question are presented in November 2009 Newsletter .
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Chloride's Trinergy : Reliable and Efficient UPS