Data Center Power issues
 

I am looking for some feedback on what each of you are doing for connectivity and redundancy in your data centers specific to dual power supplies and connectivity to UPS. We have been trying to achieve a form of redundancy by connecting our dual power supplies through separate paths of travel of PDU to UPS (UPS fully redundant distribution). However, our current power constraints to the building are limiting our ability to grow our UPS units and our ability to add additional equipment due to the requirement of keeping our UPS loads at the 50% mark. I am curious to know if you are choosing to connect your servers and equipment with UPS fully redundant distribution in place or are you simply connecting the dual power supplies to the same UPS allowing the UPS threshold to maximize at the 80% mark.

I appreciate any feedback you may have on what each of you are doing. Thanks.

Hello and welcome to the forums. If I understand your description, you are running into difficulty trying to scale up your 2N UPS architecture. I would suggest pooling your UPS units in an N+1 architecture instead. This way you will be able to maintain redundancy for single unit failures while freeing the other half of your total capacity. To do this, your current UPS units (or the ones you replace them with) will need to support parallel operation. Here's a more complete description of this strategy from the folks at Eaton, but most manufacturers offer UPS units that can be connected this way. http://pqlit.eaton.com/ll_download_b...p?doc_id=10925.

A word of caution: there is no industry standard for UPS synchronizing protocols, so each manufacturer has its own proprietary solution that is not compatible with other brands of equipment.

Hope that helps.



Ken

Data Center Design, Development, Building Systems and Operations
 

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