Table E-7 Reliability Analysis, Dam Gate Electrical Equipment

ETL 1110-2-560

30 Jun 01

Table E-7

Reliability Analysis, Dam Gate Electrical Equipment

Adjusted

Component/Block

Quan.

Failure

Weibull

Environmental

Failure

Duty

Shape Factor, β

K Factor

Rate

Factor, d

*

Rate

Circuit Breaker

2

0.3574

1.0

2

0.7148

1.0000

Forward Starter

1

0.0212

1.0

2

0.0424

0.0035

Reverse Starter

1

0.0212

1.0

2

0.0424

0.0035

Conductors in Conduit

1

0.0300

1.0

2

0.0600

0.0070

Electric Motor, AC

1

6.8834

1.0

2

13.7668

0.0070

RELIABILITY [R(t)] OF INDIVIDUAL COMPONENTS

Years in Service (Equipment is installed at time 0)

0

5

10

15

20

25

30

35

40

45

50

63

Year

1990

1995

2000

2005

2010

2015

2020

2025

2030

2035

2040

2053

Circuit Breaker

1.0000

0.9692

0.9393

0.9104

0.8823

0.8551

0.8287

0.8032

0.7784

0.7544

0.7312

0.6740

Forward Starter

1.0000

0.9999

Reverse Starter

1.0000

0.9999

Conductors in Conduit

1.0000

0.9999

0.9998

Electric Motor, AC

1.0000

0.9958

0.9916

0.9874

0.9833

0.9791

0.9750

0.9709

0.9668

0.9627

0.9587

0.9482

HAZARD RATES [h(t)] OF INDIVIDUAL COMPONENTS

Year

1990

1995

2000

2005

2010

2015

2020

2025

2030

2035

2040

2053

Circuit Breaker

0.0063

Forward Starter

0.0004

Reverse Starter

0.0004

Conductors in Conduit

0.0005

Electric Motor, AC

0.1206

RELIABILITY OF SYSTEM

[Rsys(t)]

Year

1990

1995

2000

2005

2010

2015

2020

2025

2030

2035

2040

2053

1.0000

0.9948

0.9879

0.9794

0.9695

0.9584

0.9462

0.9331

0.9191

0.9044

0.8891

0.8471

6

* Failure Rate per 10 Operating Hrs from NPRD Data 1995 (Ref. f) and(1995)Std 493, Appendix A (Ref. j) (1980).

E6 Operating Hours from Reliability Analysis Center IEEE and Appendix A of ANSI/IEEE

E-12