data generator kicks during power outage

At light load, typically below 10% of the rated nominal power, or at no load, a UPS exhibits a predominantly capacitive input power factor and a slightly higher harmonic distortion rejection in percentage of the total absorbed power.In this condition a genset would directly interface with the load power factor, harmonic distortion and load steps. In bypass operation the load is fed through the UPS bypass line by the upstream supply, which cannot thus benefit from the UPS filtering action.This simplifies a lot the design and performance of the electrical system.Įxceptions to the above are very light load operation and bypass operation. Up to date UPS running in VFI double conversion draw 99% “clean” real power, that is, a modern UPS is pretty much seen as a linear resistive load by the upstream supply. …and the genset point of viewįrom the genset’s point of view a UPS system is a load, drawing both active and reactive power, depending on the UPS mode of operation. During this crucial phase it is of utmost importance that UPS and genset run like clockwork, to prevent the changeover from being jeopardized by poor interaction. When the supply is established by the diesel generator, the rectifier performs a start-up, and the UPS operation is restored to normal double conversion. The downstream UPS system switches to battery power during the whole exchange, while its input converter, or rectifier, is off due to lack of input power. The changeover is break-before-make, and it is usually accomplished within a few seconds. In real operation, whenever a mains failure occurs, the supply is switched between incoming mains and a diesel generator set, or genset. Using a UPS with generators The UPS point of view… This article is a comprehensive guide and essential knowledge base about UPS input performance and its impact on generators’ operation. Often this might not be the case, due to mutual misunderstandings and lack of information. UPS and generators should be best friends, smoothly cooperating to improve site’s resiliency. Planning, installation, commissioning.

Data generator kicks during power outage