improve reliability while increasing capacity with less risk of overheating - all at a lower cost!

Data centers have unique power requirements: they operate 24/7/365 days a year and can’t afford downtime for repairs. They also need a maximum number of computers in a minimal amount of space. Since confined quarters can require air conditioning to remove excess heat, energy costs rise. Moreover, the PDUs involved can be damaged by the 3rd harmonic current which may be created by a non linear computer load and could reduce effective capacity.

Harmonic Limited’s patented Harmonic Suppression System (HSS) acts to prevent the damaging 3rd harmonic from even occurring, thereby restoring wasted capacity, preventing excess heat and eliminating the need for – and extra cost of – air conditioning. The sum of all these benefits is more reliable energy, significantly less downtime, and reduced energy and operating costs. The added benefit is one of sustainability: with the transformers running cooler, fewer carbon emissions are created!

A Case History

An example of a typical data center is a software development center in California. The multiple computers were supported by ten 150 kVA transformers and the expected UPS and generator backup. While the center had physical space for expanding their operation, the electrical system was near maximum capacity. Most of the transformers were loaded in the 40-50% range and all were extremely hot because of 3rd harmonic dissipation. Air conditioning costs were high. The manager was constantly worried about a failure and shut down because down time was extremely expensive. Being considered were zig-zag transformers and k-rated transformers. However, installation of either would have required replacing the transformers, re-wiring with double neutrals and several weeks of downtime. After investigating all options, the manager elected to install a SysteMax HSS on each of his transformers. Down time was limited to less than an hour per transformer. The results were as expected. Additional capacity became available, transformers ran cooler, and air conditioning costs were reduced.