Tuesday, January 31, 2012

An uninterruptible power supply (UPS)

An uninterruptible power supply, also uninterruptible power source, UPS or battery/flywheel backup, is an electrical apparatus that provides emergency power to a load when the input power source, typically mains power, fails. A UPS differs from an auxiliary or emergency power system or standby generator in that it will provide instantaneous or near-instantaneous protection from input power interruptions by means of one or more attached batteries and associated electronic circuitry for low power users, and or by means of diesel generators and flywheels for high power users. The on-battery runtime of most uninterruptible power sources is relatively short—5–15 minutes being typical for smaller units—but sufficient to allow time to bring an auxiliary power source on line, or to properly shut down the protected equipment.

While not limited to protecting any particular type of equipment, a UPS is typically used to protect computers, data centers, telecommunication equipment or other electrical equipment where an unexpected power disruption could cause injuries, fatalities, serious business disruption or data loss. UPS units range in size from units designed to protect a single computer without a video monitor (around 200 VA rating) to large units powering entire data centers, buildings, or even cities.

Tuesday, January 17, 2012

GE's Office Bently Nevada, Minden Nevada

GE's Office Bently Nevada, Minden Nevada

Sunday, January 1, 2012

Sheet Metal Thickness Gauges

Gauge (ga)

Standard Steel Thickness (inches)

Galvanized Steel Thickness (inches)

Aluminum Thickness (inches)

3

0.2391


0.2294

4

0.2242


0.2043

5

0.2092


0.1819

6

0.1943


0.1620

7

0.1793


0.1443

8

0.1644


0.1285

9

0.1495

0.1532

0.1144

10

0.1345

0.1382

0.1019

11

0.1196

0.1233

0.0907

12

0.1046

0.1084

0.0808

13

0.0897

0.0934

0.0720

14

0.0747

0.0785

0.0641

15

0.0673

0.0710

0.0571

16

0.0598

0.0635

0.0508

17

0.0538

0.0575

0.0453

18

0.0478

0.0516

0.0403

19

0.0418

0.0456

0.0359

20

0.0359

0.0396

0.0320

21

0.0329

0.0366

0.0285

22

0.0299

0.0336

0.0253

23

0.0269

0.0306

0.0226

24

0.0239

0.0276

0.0201

25

0.0209

0.0247

0.0179

26

0.0179

0.0217

0.0159

27

0.0164

0.0202

0.0142

28

0.0149

0.0187

0.0126

29

0.0135

0.0172

0.0113

30

0.0120

0.0157

0.0100

31

0.0105

0.0142

0.0089

32

0.0097

0.0134

0.0080

33

0.0090


0.0071

34

0.0082


0.0063

35

0.0075


0.0056

36

0.0067



Related Posts with Thumbnails