* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Download SK0-004-04
Voltage optimisation wikipedia , lookup
Power factor wikipedia , lookup
Electrical substation wikipedia , lookup
Standby power wikipedia , lookup
Wireless power transfer wikipedia , lookup
History of electric power transmission wikipedia , lookup
Uninterruptible power supply wikipedia , lookup
Electric power system wikipedia , lookup
Audio power wikipedia , lookup
Alternating current wikipedia , lookup
Power over Ethernet wikipedia , lookup
Rectiverter wikipedia , lookup
Amtrak's 25 Hz traction power system wikipedia , lookup
Electrification wikipedia , lookup
Switched-mode power supply wikipedia , lookup
Power supply wikipedia , lookup
Mains electricity wikipedia , lookup
CompTIA Server+ Certification (Exam SK0-004) 4.3 Power Distribution This courseware is copyrighted © 2016 gtslearning. No part of this courseware or any training material supplied by gtslearning International Limited to accompany the courseware may be copied, photocopied, reproduced, or re-used in any form or by any means without permission in writing from a director of gtslearning International Limited. Violation of these laws will lead to prosecution. All trademarks, service marks, products, or services are trademarks or registered trademarks of their respective holders and are acknowledged by the publisher. All gtslearning products are supplied on the basis of a single copy of a course per student. Additional resources that may be made available from gtslearning may only be used in conjunction with courses sold by gtslearning. No material changes to these resources are permitted without express written permission by a director of gtslearning. These resources may not be used in conjunction with content from any other supplier. If you suspect that this course has been copied or distributed illegally, please telephone or email gtslearning. Objectives • Implement server-class power supplies and UPS • Describe features of data center power distribution 4.3 Power Distribution 319 Power • Voltage o Potential difference o Volts • Current o Flow of electrons o Amps • Resistance o (Non) conductivity o Ohms (R) • Power o Watts o Volts * Amps • AC versus DC • VAC supply differences 4.3 Power Distribution 319 Power Problems • Fuse • Grounding • Surges • Sags • Brownouts • Blackouts • Electromagnetic Interference 4.3 Power Distribution 320 Power Supply Unit • Wattage and Power Rating • Rack-mounted and Blade PSUs • Redundant Power (Hot Plug PSUs) • Standalone PSUs 4.3 Power Distribution 322 Connector Types and Voltages • ATX Power Supply • P1 (motherboard) • 24-pin (legacy 20-pin) • Molex / SATA • Device power • PCIe • Supplement bus power • 8-pin (legacy 6-pin) • P4 / EPS12V 4.3 Power Distribution • CPU power • 8-pin (4-pin legacy) 324 Dealing with Power Problems • Surge suppressor • Line conditioner • Uninterruptible Power Supply (UPS) • Backup generator 4.3 Power Distribution 325 Uninterruptible Power Supplies (UPS) • Types o Online o Line interactive o Offline • Ride-through • Configuration tools 4.3 Power Distribution 325 UPS Sizing • Maximum load o VA versus watts o Apparent power versus actual power o Power Factor / Power Factor Correction (PFC) • Run time versus capacity 4.3 Power Distribution 327 UPS in the Data Center • Data center capacity planning • UPS monitoring o Status alerts o Power event behavior 4.3 Power Distribution 330 UPS Maintenance • Size and weight – handling and placement • Battery replacement o Test procedures o Hot swapping batteries (bypass mode) o Battery disposal 4.3 Power Distribution 331 PDUs • Circuit current (amperage) • Power Distribution Unit (PDU) o Maximum load (V*A = W) o Allow 20% overhead o Connector types (IEC Cxx and NEMA x-yy) 4.3 Power Distribution 333 Power Circuits • Power conversions o o o 440V, 460V, or 480V delivered to the UPS, which will either output the same voltage to the PDU or use a 3-phase scheme to output 480 / 277 VAC or 415 / 240 VAC to the PDU The PDU converts the high voltage AC mains supply to a "regular" AC voltage (usually one of 208 VAC, 277 VAC, or 240 VAC) for the PSUs The PSUs then perform their power conversion to deliver 12V DC to the server components or blade enclosure • 48V DC supply • Redundant power circuits • 3-phase power supply • Twist-lock plug types (NEMA Lx) 4.3 Power Distribution 334 Review • Implement server-class power supplies and UPS • Describe features of data center power distribution 4.3 Power Distribution 336