HP DL360 Power basics for IT professionals - Page 1

Power basics for IT professionals technology brief Abstract...2 Introduction...2 General terms ...2 Power generation, transmission, and distribution 3 Generation and transmission ...3 Present-day power distribution infrastructure 4 Regional power distribution...5 Power distribution at the site ...5 Power factor correction ...14 Leakage current ...15 Grounding ...15 Power utilization ...17 Three-phase versus single-phase power 17 Panel distribution ...18 Distribution within the rack ...19 Uninterruptible Power Supplies (UPS 20 Wiring methods ...21 High-line or low-line input voltage ...23 Inrush current...23 Plugs and receptacles ...24 Power trends and strategies ...24 Tools for powering the data center...26 Appendix A. United States design standards 27 Appendix B. Voltages and frequencies of individual countries 28 Appendix C. Plug and socket types...31 Glossary ...35 For more information...44 Call to action ...44