AC Controls

Combination Starters (NEMA Sizes 0–4)

General / Dimensions

Combination Starter With Type MCS Disconnect Switch

Dimensions

Combination Starter With ETI Circuit Breaker

The Type ETI circuit breaker, sometimes called a Motor Circuit Interrupter, is

a device designed specifically for application in motor circuits. The ETI is a magnetic only protective device designed to provide protection against short circuit current.

The instantaneous-only type ETI circuit breaker employs adjustable magnetic trip settings to allow broader application ranges and a higher degree of motor short circuit protection.

Table 15.25 3-Phase Magnetic Motor Starter

NEMA

 

Maximum Horsepower

Starter

Half

 

 

 

Size

Size

200V

230V

460/575V

0

0

3

3

5

1

1

7.5

7.5

10

1 3⁄4*

1 3⁄4

10

10

15

2

2

10

15

25

2 1⁄2*

2 1⁄2

15

20

30

3

3

25

30

50

3 1⁄2*

3 1⁄2

30

40

75

4

4

40

50

100

Type MCS Disconnect Switches

Type MCS Disconnect Switches feature a quick-make, quick-break mechanism to insure proper switch operation. With a high fault withstand rating of 100 kA at 480 volts ac, when fused with Class R rated size fuses, MCS switches meet stringent industry standards set forth by the automotive, petro-chemical, and pulp and paper industries.

With visible blade contacts for ease of inspection, removable line shields, and front removable fuse clips and lugs, disconnect switches are UL recognized and CSA certified. They are available with Class H, J, and R fuse kits for a wide range of fused, non-fused, and over- fusing options.

Table 15.26 Magnetic Motor Starter

 

Dimensions in Inches (mm)

 

Size

A

B

C

NEMA 1

0 –13⁄4

23.25

11.00

7.63

General

 

(591)

(279)

(194)

Purpose

 

 

 

 

2, 2 1⁄2

26.75

12.13

7.63

Standard

Width 0–4

 

(679)

(308)

(194)

 

3

31.50

12.50

7.63

 

(800)

(318)

(194)

 

 

NEMA 1

 

 

 

 

General

3 1⁄2 , 4

48.97

12.13

9.94

Purpose

Standard

 

(1244)

(308)

(252)

 

 

 

 

Width 31⁄2–4

 

 

 

 

NEMA 12

0 – 21⁄2

29.50

12.13

7.69

Industrial

 

(749)

(308)

(195)

Use

 

 

 

 

Standard

3

34.25

12.50

7.69

Width 0–4

 

(870)

(318)

(195)

NEMA 12

 

 

 

 

Industrial

31⁄2 , 4

48.94

19.13

9.94

Use

Standard

 

(1243)

(486)

(252)

Width 31⁄2–4

 

 

 

 

15

Controls AC

CSI Section 16160

Siemens Electrical Products and Systems

297

 

Specification Guide