Power supplies use switching technology to convert the AC input to lower DC voltages.The typical voltages supplied are 3.3 Volt,5 volt,and 12 Volt.3.3 and 5 are typically used by digital circuits,while the 12 is used to run motors in disk drives and fans.

to help you to estimate the wattage of your system,here we list some power consumption values for common items in a personal computer:

PC item Watts
Motherboard(without CPU or RAM 20-30
CPU 30-45
Accelerated Graphics Port card 20-30
Peripheral Component Interconnect car 5
Small Computer System Interface card 20-25
Floppy disk drive 5
Network interface card 4
50X CD-ROM drive 10-25
RAM 20/256M
5,200 RPM IDE hard disk drive 5-11
7,200 RPM IDE hard disk drive 5-15

UPS

先将PC主机和显示器的电源插座插入UPS背面的插孔;

第一次开机:

2.1 储能电池开关ON---自动旁路开关ON---输出开关ON,延时1分钟,旁路灯熄灭,完成开机;

2.2 空载运行10分钟后,按照负载功率由小到大的顺序启动负载;

日常开机:UPS面板开键,约20分钟后,开启PC;

关机:先关PC,让UPS空载运行10分钟后,再按面板关键;

可分为在线式和后备式,方波输出和正弦波输出;

由整流、储能、变换和开关四部分组成;

电网电压工作正常时,给负载供电的同时,给储能电池充电;当负载过载时,电网电压经整流给负载供电;

UPS的中文意思为“不间断电源”,是英语“Uninterruptible Power Supply”的缩写,它可以保障计算机系统在停电之后继续工作一段时间以使用户能够紧急存盘,使您不致因停电而影响工作或丢失数据。

据IDC统计,全部电脑故障的45%是由电源问题引起的;