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297CSI Section 16160
Siemens Electrical Products and Systems
Specification Guide
AC Controls
15
Combination Starter With ETI
Circuit Breaker
The Type ETI circuit breaker, sometimes
called a Motor Circuit Interrupter, is
a device designed specifically for applica-
tion 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.
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.
AC Controls
Combination Starters (NEMA Sizes 0–4)
General / Dimensions
Dimensions in Inches (mm)
Table 15.26 Magnetic Motor Starter
Size A B C
NEMA 1
General
Purpose
Standard
Width 0–4
NEMA 1
General
Purpose
Standard
Width 3
1
⁄
2
–4
0–1
3
⁄
4
2, 2
1
⁄
2
3
3
1
⁄
2
, 4
23.25
(591)
26.75
(679)
31.50
(800)
48.97
(1244)
7.63
(194)
7.63
(194)
7.63
(194)
9.94
(252)
NEMA 12
Industrial
Use
Standard
Width 0–4
NEMA 12
Industrial
Use
Standard
Width 3
1
⁄
2
–4
0–2
1
⁄
2
3
3
1
⁄
2
, 4
29.50
(749)
34.25
(870)
48.94
(1243)
12.13
(308)
12.50
(318)
19.13
(486)
7.69
(195)
7.69
(195)
9.94
(252)
11.00
(279)
12.13
(308)
12.50
(318)
12.13
(308)
Combination Starter With Type MCS
Disconnect Switch
Dimensions
Maximum Horsepower
Table 15.25 3-Phase Magnetic
Motor Starter
460/575V230V200V
NEMA
Starter
Size
Half
Size
0
1
1
3
⁄
4
*
2
2
1
⁄
2
*
3
3
1
⁄
2
*
4
0
1
1
3
⁄
4
2
2
1
⁄
2
3
3
1
⁄
2
4
3
7.5
10
10
15
25
30
40
3
7.5
10
15
20
30
40
50
5
10
15
25
30
50
75
100