HP Hewlett Packard Switch Class MMS and MRS User Manual
AC Controls  
Manual Starters and Switches  
General  
Class MMS and MRS  
These motor starting switches provide  
manual ON / OFF control of single or  
three-phase AC motors, where overload  
protection is not required, or is provided  
separately.  
These devices are suitable for use with  
AC three-phase motors up to 10 HP.  
Compact construction and a 600 volt  
rating make these switches suitable for  
a wide range of industrial and commer-  
cial uses. Typical applications include  
small machine tools, pumps, fans, con-  
veyors, and many other types of electri-  
cal machinery. They can also be used  
on non-motor loads such as resistance  
heaters.  
The continuous current rating is 30  
amperes at 250 volts max., 26.4 am-  
peres at 277 volts max., 20 amperes  
at 600 volts max, 30 ampere resistive  
at 600 volts max.  
Class MMS, two-speed manual switch-  
es may be used with separate winding,  
three-phase or single-phase AC motors  
where overload protection is not  
required, or is provided separately. Two  
switches are employed to give ON /  
OFF control in each speed.  
Class MRS, reversing manual switches  
provide a compact means of starting,  
stopping and reversing AC motors where  
overload protection is not required, or is  
provided separately. They are suitable for  
use with three-phase squirrel cage  
motors, and for single-phase motors  
which can be reversed by reconnecting  
motor leads. Two switches are used, one  
to connect the motor for forward rota-  
tion, and one for reverse.  
Type F02  
Type K02  
Class SMF  
versions allowing more wiring space. A  
zinc alloy die casting or non-metallic  
enclosure is used for NEMA Type 4  
enclosures. NEMA 7 & 9 enclosures are  
supplied as standard with provisions for  
locking in the ON or OFF position.  
Standard red or non-standard green  
neon pilot light units are available facto-  
ry installed in NEMA Type 1 surface and  
flush mounting, and NEMA Type 4  
enclosures, or as a field modification kit  
for NEMA Type 1 enclosures and gray  
flush plates.  
An “Emergency-OFF” toggle operator  
extender is available for NEMA Type 1  
surface mounted units. The extender  
has a red vinyl button that provides a  
fast and easy method for locating and  
switching the device’s toggle operator  
into the OFF position. The Emergency  
OFF Actuator is available in kit form  
only for field installation.  
An optional Handle Guard / Lock-OFF on  
NEMA Type 1 enclosed starters pre-  
vents accidental operation of the toggle  
and also allows the toggle operator to  
be padlocked in either the ON or the  
OFF position. This handle guard can be  
factory installed on NEMA Type 1  
Class SMF fractional horsepower  
starters provide overload protection as  
well as manual ON / OFF control for  
small motors in a variety of industrial  
and commercial installations.  
Available in one or two pole versions,  
these devices are suitable for use with  
AC single phase motors to 1 HP. Two  
pole starters can also be used with DC  
motors to 3⁄4 HP. Typical applications  
include fans, conveyors, pumps, and  
small machine tools. The continuous  
current rating is 16 amperes.  
Overload trip assembly motor protection  
is provided by a Type SMFH thermal  
heater element which must be installed  
before the starter will operate.  
Two-Speed Class SMF manual starters  
are designed for control of small single  
phase AC motors having separate wind-  
ings for high and low speed operation.  
Two toggle operated starters are used,  
with overload protection included for  
each motor winding. Surface mounting  
devices, and those with a gray flush  
plate, utilize a mechanical interlock  
which allows direct control of the motor  
by means of the toggle operators.  
Class SMF, MMS and MRS  
enclosed starters and is also available in  
kit form for field installation on NEMA  
Type 1 surface and flush mounting  
enclosures. Standard NEMA Type 4  
metallic enclosures include provision for  
padlocking in the OFF position.  
NEMA Type 1 surface mounting enclo-  
sures are sheet steel with a thermoplas-  
tic wrap-around cover for convenience  
in wiring. The NEMA Type 1 enclosure  
is also available in oversized and jumbo  
Typical Wiring Diagrams  
Class SMF  
Class MMS  
15  
2 Pole with  
Selection Switch  
1 Pole  
2 Pole  
2 Pole –– 1 Phase  
3 Pole –– 3 Phase  
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Specification Guide  
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AC Controls  
Manual Starters and Switches  
General  
Table 15.1 Horsepower Ratings  
Table 15.2 Horsepower Ratings  
AC Ratings  
DC Ratings  
Maximum Horsepower  
Number  
of  
AC Single Phase  
DC 2-Pole Only  
Motor Type  
AC  
115  
Volts  
230  
Volts Volts  
460–575 90  
115  
Volts  
230  
Volts  
Device  
Poles  
Volts  
Voltage 1-Pole  
2-Pole  
2
3
2
3
2
Single Phase  
Three Phase  
Single Phase  
Three Phase  
Single Phase  
3 Phase, Constant  
or Var. Torque  
3 Phase,  
Constant HP  
2
2
2
2
2
2
3
10  
3
10  
3
1
1
1
1
1
2
2
2
2
2
11  
11  
11  
11  
11  
⁄
⁄
⁄
⁄
⁄
3
⁄
—
2
2
2
2
2
Class  
MMS  
1
1
1
1
115–230  
277  
4
71  
⁄
⁄
2
2
71  
2
Class  
MRS  
2
Class  
MMS  
Two  
3
3
2
2
71  
10  
10  
1
1
2
2
11  
⁄
⁄
⁄
2
2
Speed  
71  
1
2
Table 15.3 Manual Starters and Switches Features  
Class SMF Fractional Horsepower  
Manual Starters with Melting  
Alloy Type Thermal Overload Relay,  
Single Unit Types  
Class MRS and MMS Manual  
Switches  
Type of  
Operator  
No. of  
Poles  
Type of  
Operator  
No. of  
Poles  
Features  
Features  
Basic Starter  
Toggle  
Class MMS — Non-Reversing  
1
2
1
2
1
2
1
2
Standard With Pilot Light (115 and 230 VAC)  
Toggle  
Key  
Standard With Pilot Light (205–240 and 440–600 VAC)  
Standard With Pilot Light (115 and 230 VAC)  
Standard With Pilot Light (208–240 and 440–600 VAC)  
Features  
Standard With Red Pilot Light  
Key  
Starter With Handle Guard / Lock-Off  
Type of  
Operator  
No. of  
Poles  
Suitable for  
Motor Types  
(Incl. Mechanical  
Interlock)  
1
2
1
2
Toggle  
Class MMS — Reversing  
Standard With Red Pilot Light  
Single-Phase Two-  
Winding (3-Lead)  
Std. With Pilot Light  
(115 and 230 VAC)  
2
Toggle  
One Starter In Duplex Enclosure  
3-Phase and 1-Phase  
Capacitor, Split-Phase  
4-Lead Repul.-Induct.  
Std. With Pilot Light  
(110–120, 208-220,  
440–600 VAC)  
3
2
2
Toggle  
Key  
Standard With Red Pilot Light  
Class MMS — Two-Speed  
Two Starters In One Enclosure  
Single-Phase Two-  
Winding (3-Lead)  
Three-Phase  
Separate Winding  
(Wye-Connected)  
Std. With 2 Pilot Lights  
(115 and 230 VAC)  
Std. With 2 Pilot Lights  
(208-220, and  
440–600 VAC)  
Toggle  
2
Toggle  
Key  
2 Each  
Str.  
Standard With Red Pilot Light On Each  
Starter and “Auto-Off-Hand” SPDT Selector Switch (AC Only)  
3
1
2
2
Toggle  
Key  
Standard With Red Pilot Light  
With Red Pilot Light  
Two-Speed Starters (AC Only)  
1
2
With Mechanical Interlock (Standard With 2 Red Pilot Lights)  
With High-Off-Low Selector Switch (With 2 Red Pilot Lights)  
Toggle  
Table 15.4 Class SMF Heater Elements  
Motor Full-Load  
Heater  
Motor Full-Load  
Heater  
Motor Full-Load  
Heater  
Motor Full-Load  
Heater  
Current (Amperes)  
Cat. No.  
Current (Amperes)  
Cat. No.  
Current (Amperes)  
1.80–1.99  
1.96–2.15  
2.16–2.38  
2.39–2.75  
2.76–2.84  
2.85–3.06  
3.07–3.45  
3.46–3.70  
3.71–4.07  
4.08–4.32  
4.33–4.90  
4.91–5.35  
5.36–5.85  
Cat. No.  
Current (Amperes)  
5.86–6.41  
6.42–6.79  
6.80–7.57  
7.58–8.15  
8.16–8.98  
8.99–9.67  
9.68–9.95  
9.96–10.8  
10.9–12.1  
12.2–13.1  
13.2–13.9  
14.0–15.0  
15.1–16.0  
Cat. No.  
SMF H40  
SMF H41  
SMF H42  
SMF H43  
SMF H44  
SMF H45  
SMF H46  
SMF H47  
SMF H48  
SMF H49  
SMF H50  
SMF H51  
SMF H52  
SMF H01  
SMF H02  
SMF H03  
SMF H04  
SMF H05  
SMF H06  
SMF H07  
SMF H08  
SMF H09  
SMF H010  
SMF H011  
SMF H012  
SMF H013  
SMF H014  
SMF H015  
SMF H016  
SMF H017  
SMF H018  
SMF H019  
SMF H020  
SMF H021  
SMF H022  
SMF H023  
SMF H024  
SMF H025  
SMF H026  
SMF H027  
SMF H028  
SMF H029  
SMF H030  
SMF H031  
SMF H032  
SMF H033  
SMF H034  
SMF H035  
SMF H036  
SMF H037  
SMF H038  
SMF H039  
0.157–0.173  
0.174–0.192  
0.193–0.212  
0.213–0.235  
0.236–0.261  
0.262–0.289  
0.290–0.321  
0.322–0.355  
0.356–0.399  
0.40–0.44  
0.59–0.65  
0.66–0.71  
0.72–0.78  
0.79–0.85  
0.86–0.96  
0.97–1.04  
1.05–1.16  
1.17–1.25  
1.30–1.39  
1.38–1.54  
1.48–1.63  
1.57–1.75  
1.66–1.86  
15  
0.45–0.49  
0.50–0.53  
0.54–0.58  
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AC Controls  
Manual Starters and Switches  
Dimensions  
Table 15.5 General Purpose Flush Mounting  
Dimensions  
in Inches (mm)  
Type of  
Operator  
Device  
Type  
A
B
C
FF1, 1P, 2, 2P  
FS1, 1P, 2, 2P  
1.44  
(37)  
1.44  
(37)  
1.44  
(37)  
1.44  
(37)  
1.75  
(44)  
1.75  
(44)  
1.75  
(44)  
1.75  
(44)  
2.75  
(70)  
3.50  
(89)  
2.75  
(70)  
3.50  
(89)  
2.75  
(70)  
3.50  
(89)  
2.75  
(70)  
3.50  
(89)  
4.50  
(114)  
5.25  
(133)  
4.50  
(114)  
5.25  
(133)  
4.50  
(114)  
5.25  
(133)  
4.50  
(114)  
5.25  
Class  
SMF  
Toggle  
Fractional  
HP Starter  
FSJ1P, 2P  
FF3, 3P, 4, 4P  
FS3, 3P, 4, 4P  
Key  
FSJ3P, 4P  
Class  
MMS  
Motor  
Starting  
Switch  
KF1, 1A, 1B, 2, 2B, 2C  
FS1, 1A, 1B, 2, 2B, 2C  
Toggle  
Key  
KSJ1A, 1B, 2B, 2C  
KF3, 3A, 3B, 4, 4B, 4C  
FS3, 3A, 3B, 4, 4B, 4C  
KSJ3A, 3B, 4C, 4C  
(133)  
Table 15.6 Two Unit Devices  
NEMA Type 1 General Purpose Enclosure  
Type of  
Operator  
Device  
Type  
Class  
One Starter  
Toggle  
Key  
Toggle  
Key  
Toggle  
Key  
SMF  
SMF  
SMF  
SMF  
SMF  
SMF  
FG02, 02P  
FG04P  
FG222, 222P  
FG44P  
FG71, 71P, 72, 72P  
FG74P  
Two Starters  
One Str. and  
One Sel. Sw. ቢ  
Reversing Switch ባ Toggle  
KG11, 11A, 11B, 22, 22A, 22B  
22C  
MRS  
Two Speed Starter  
Two Speed Switch  
Toggle  
Toggle  
SMF  
MMS  
FG11, 11P, 22, 22P  
KG11, 11A, 11B, 22, 22B, 22C  
ቢ
ባ
Selector switch is on left, increases overall depth to 3.5 in. (89mm)  
Only one pilot light (located on right) is used on MRS switches.  
Table 15.7 General Purpose Flush Mounting  
for Two Unit Devices  
Dimensions  
in Inches (mm)  
Type of  
Device  
Operator Class Type  
A
B
C
D
Two  
FF22, 22P  
FS22P  
FF44P  
5.25 (133) 3.75 (95) 5.25 (133) 1.44 (37)  
4.56 (116) 3.50 (89) 4.50 (114) 1.44 (37)  
5.25 (133) 3.75 (95) 5.25 (133) 1.44 (37)  
4.56 (116) 3.50 (89) 4.50 (114) 1.44 (37)  
Toggle  
Key  
SMF  
SMF  
SMF  
SMF  
Starters  
FS44P  
FF71, 71P, 72, 72P 5.25 (133) 0.75 (19) 5.25 (133) 2.00 (51)  
FS71P, 72P  
FF74P  
One  
Toggle  
Key  
Starter  
and One  
Selector  
Switch ᕅ  
2.00 (51)  
4.56 (116) 3.50 (89) 4.50 (114)  
5.25 (133) 3.75 (95) 5.25 (133) 2.00 (51)  
4.56 (116) 3.50 (89) 4.50 (114) 2.00 (51)  
FS74P  
KF11, 11A, 11B  
KF 22, 22A  
22B, 22C  
Reversing  
Switch  
MRS  
15  
Toggle  
Toggle  
5.25 (133) 3.75 (95) 5.25 (133) 1.75 (44)  
5.25 (133) 3.75 (95) 5.25 (133) 1.44 (37)  
Two  
Speed  
Starter  
FF11, 11P, 22  
22P  
SMF  
Two  
Speed  
Switch  
KF11, 11A, 11B  
22, 22B, 22C  
5.25 (133) 3.75 (95) 5.25 (133) 1.75 (44)  
Toggle  
MMS  
ᕅ
Selector switch is on left, extends 1.62 in (41 mm) from mounting surface.  
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AC Controls  
Manual Motor Starter Switches  
Dimension / Wiring Diagrams  
3.97 in.  
(100.8 mm)  
1.38 in.  
(35.05 mm)  
4.38 in.  
(111.25 mm)  
Table 15.8 Explosion Proof  
NEMA 7 & 9 Enclosures  
Type of  
Operator  
Device  
Type  
Class SMF  
Fractional  
HP Starter  
6.38 in.  
FR2, FR2H  
FR1, FR1H  
(162 mm)  
Toggle  
5.75 in.  
(146 mm)  
Class MMF  
Motor  
KR2, KR2H  
KR2, KR1H  
Toggle  
Starter  
Switch  
9⁄32  
Padlock  
Hole  
Center Line  
(Conduit)  
0.75 in. -14  
(19.05 mm)  
Pipe Tap  
1.19 in.  
(30.23 mm)  
0.31 in.  
(7.94 mm)  
Mtg. Holes  
1.38 in.  
(34.93 mm)  
0.72 in.  
(18.29 mm)  
(Bottom Only)  
Application  
Features  
be added at any time before or after  
installation.  
Class 12 manual starting switches are  
designed to economically start and stop  
inherently protected single and polyphase  
motors as used in light machine tools,  
pumps, blowers, and vent-fans. They are  
also used as ON and OFF switches for  
resistive loads such as heating.  
This switch is compact, economical, and  
easily wired using pressure type screw  
connectors. A rugged over center toggle  
mechanism results in a long life with  
weld free operation. It is available for sur-  
face mounting in a NEMA 1 enclosure,  
for flush mounting on a standard depth  
switch box or in custom panels. A pilot  
light for 120, 208 / 240, or 480 volts may  
Table 15.9  
Class 12 Manual Starting Switches  
Maximum Horsepower  
230–  
115  
575  
120V Continuous  
Type  
1-Phase  
3-Phase  
Volts  
Volts  
DC  
1
Amp Rating  
2
—
3
2
24  
15  
—
Wiring Diagrams  
1-Phase  
3-Phase  
Dimension Drawings  
NEMA 1  
Open with Flush Plate  
15  
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AC Controls  
Manual Motor Starter Protector  
General / Dimensions  
½ The Manual Starters Meet or Exceed  
Requirements of NEMA, EEMAC, UL,  
CSA, IEC, VDE and Other International  
Standards. The built-in instantaneous  
magnetic trip (similar to a circuit  
breaker with arc chamber) provides  
self protection against low-level short  
circuits.  
½ Motor Ratings — Up to 25 HP 3-  
Phase and 10 HP Single Phase.  
½ Class 10 Adjustable Ambient  
Type 3VU13 Manual Motor Starter  
Protector  
Compensated Overload Protection.  
½ Phase Loss Sensitivity.  
Siemens 3VU13 is a 3-phase manual  
starter providing adjustable overload  
protection, optional field installed under-  
voltage protection, and short circuit  
protection.  
½ Undervoltage Protection — UV trip  
module may be added in field.  
½ Shunt Trip Module is also field adda-  
ble.  
Overlead and Magnetic Trip Tripping  
Characteristics  
½ Available in Open Styles, NEMA 1 and  
3R, watertight, dusttight, under table,  
and flush mount enclosures.  
Features  
½ Built-in Short Circuit Protection. Short  
circuit protection provided by the  
usual branch circuit protection device  
feeding a manual starter (fuse or cir-  
cuit breaker in accordance with NEC  
430-52) may not protect a common  
manual starter. The factory built-in  
instantaneous trip of the Motor Starter  
Protector will protect the starter as  
well as the cable and motor during  
low level faults.  
Table 15.10 Technical Data  
Manual Motor Starter Protector  
½ 1 NO and 1 NC Auxiliary Contacts  
Standard.  
Type  
3VU13  
25  
Maximum Rated Continuous  
Current (Amperes)  
½ Group Installation - UL 508.  
The 3VU13 is suitable for Group  
Installation at 5kA 600 volts maximum  
with any fuse up to 1200 amperes or  
any inverse time circuit breaker up to  
1200 amperes. The 3VU13 can be  
installed with or without Siemens con-  
tactors type 3TF2 or 3TF30 to 3TF34  
in series. For higher interrupting rat-  
ings, consult Siemens.  
Rated Operating Voltage AC  
—Power Circuit  
600V  
—Control Circuit  
Ambient Temperature  
Compensation °C  
+
–
20 55  
Maximum Rated HP of  
3-phase Motors At:  
—AC 200V  
—AC 240V  
—AC 460V  
—AC 575V  
5
71  
⁄
2
15  
20  
3VU13 Enclosure Dimensions  
15  
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AC Controls  
Manual Motor Starters and Contactors  
General / Wiring Diagrams  
Application  
Across the line manual motor starters  
and contactors provide control for  
machinery where start stop remote con-  
trol is not required (optional remote stop  
available). Class 11 manual starters are  
used for single and polyphase motors up  
to 10 Hp. Starters have melting alloy  
overload relays which help protect  
against damage due to excessive current  
caused by a sustained overload, low line  
voltage, or single phasing of the motor.  
Contactors provide control for inherently  
protected motors. Typical applications  
include metal and wood-working machin-  
ery, grinders, power saws, conveyors,  
fans pumps, blowers, textile and packag-  
ing machinery, slitters, and paper cutters.  
Features  
Class 11 manual controllers have front  
accessible pressure type wire connec-  
tors. Ample wiring space is provided for  
easy wiring.  
A complete line of general purpose and  
industrial duty enclosures is available as  
well as open type mounting for custom  
built enclosures. These manual con-  
trollers are available with low voltage pro-  
tection which will automatically open the  
power poles when the voltage drops or  
the power is interrupted. A remote stop  
function may be incorporated with the  
low voltage protection coil as a factory  
option to provide remote or semi-auto-  
matic operation.  
Class 11 controllers provide the OSHA  
requirements for protecting personnel  
from potential injury caused by the auto-  
matic start up of machinery following a  
voltage drop or power interruption when  
low voltage protection is specified.  
Open styles and devices in NEMA 1, 4, 7  
& 9, 12 enclosures can be padlocked in  
the OFF position.  
Table 15.11  
Class 11 Manual Motor Starters  
Maximum Horsepower  
Type  
Size  
M0  
115 Volts  
200/230 Volts  
1
2
3
2
3
5
M1  
1-Phase  
M1P  
Type  
Size 200/230 Volts 460/575 Volts  
M0  
M1  
3
7
5
10  
3-Phase  
1
⁄
2
15  
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AC Controls  
Manual Motor Starters and Contactors  
Dimensions  
Table 15.12 Motor Starters  
Mounting  
Mtg.  
Max Approx  
Wire Ship Wt Ref  
Size Lbs Dwg  
Outline Dimensions in Inches (mm)  
Dimensions in Inches (mm)  
Screw Conduit Size  
Enclosure  
Type  
Open  
Fig  
1
A
B
C
D
E
G
K1  
—
K2  
—
—
—
—
3/4  
—
5.313 (134.94)  
2.500 ( 63.50)  
5.688 (114.46)  
6.250 (158.75)  
7.938 (201.62)  
7.125 (184.15)  
5.875 (149.23)  
3.625 ( 92.08)  
3.188 ( 80.96)  
5.125 (130.18)  
7.313 (185.74)  
5.875 (149.23)  
5.063 (128.59)  
5.500 (139.70)  
2.250 ( 57.15)  
2.500 ( 63.50)  
4.125 (104.78)  
6.875 (174.63)  
6.063 (153.99)  
3.000 ( 76.20)  
10  
10  
1/4  
10  
1/2  
—
8
8
8
8
8
8
3
8
10  
12  
27  
11  
D54755  
D25055  
D54824  
D26243  
D56049  
D25293  
2
3
4
5
8.000 (203.20)  
11.875 (301.63)  
11.875 (301.63)  
11.000 (279.40)  
9.700 (233.36)  
5.875 (149.23)  
10.375 (263.53)  
11.125 (282.58)  
9.188 (233.36)  
8.625 (219.08)  
1/2 – 3/4  
—
NEMA 1  
NEMA 4  
NEMA 4X  
NEMA 7 & 9  
NEMA 12  
1
1/2  
6
—
Figure 1  
Figure 2  
Figure 3  
15  
Figure 5  
Figure 6  
Figure 4  
Siemens Electrical Products and Systems  
Specification Guide  
CSI Section 16160  
291  
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AC Controls  
Magnetic Contactors  
General  
Applications  
Class 40 industrial magnetic contactors  
are designed for electrical loads such as  
heating, lighting, transformer and capaci-  
tor switching, and AC motor starting.  
They control motors already protected by  
inherent or other types of overload  
devices. Used with appropriate pilot con-  
trol, a contactor provides a choice of  
undervoltage protection or release.  
Class 40 contactors Size 0 thru 6 feature  
carefully wound coils encapsulated to  
seal out moisture. Encapsulation also pro-  
motes heat transfer and resists electrical,  
mechanical, and thermal stresses.  
3
4
Compact Lighting Contactor  
Size 0–1 /  
Table 15.13 Coil Data  
Features  
Inrush  
(Open Magnet)  
Normal  
(Sealed Magnet)  
Horsepower rated contactors are avail-  
Class  
Size  
Volts  
able in NEMA sizes 00 through 6, plus  
Watts  
60Hz  
24  
Amps  
2.63  
0.59  
0.34  
0.305  
0.25  
1.49  
0.121  
9.08  
1.82  
1.05  
0.91  
0.79  
0.45  
0.36  
12.90  
2.58  
1.49  
1.29  
1.12  
0.646  
0.516  
4.25  
2.45  
2.14  
1.77  
1.08  
0.85  
12.65  
6.32  
3.16  
2.53  
1.45  
0.73  
0.58  
VA  
Amps  
0.37  
VA  
four Siemens Furnas Half Sizes: 13  
⁄
4
, 21  
⁄
2
,
31 , and 41  
⁄2. These contactors are avail-  
⁄
2
120  
208  
240  
277  
480  
600  
24  
120  
208  
240  
277  
480  
600  
24  
120  
208  
240  
277  
480  
600  
120  
208  
240  
277  
480  
600  
120  
240  
480  
600  
240  
480  
600  
0.08  
able as an open type or in NEMA 1, 3, 4,  
4X, 7 & 9, or 12 enclosures. These con-  
tactors can also be used on capacitor and  
transformer switching applications.  
0.05  
0.045  
0.03  
0.02  
0.02  
1.04  
0.21  
0.12  
0.105  
0.090  
0.052  
0.042  
1.08  
13.3  
70  
10  
25  
00  
Resistance heating contactors are avail-  
able in 11 sizes from 10 through 350  
amperes in 2- and 3-pole models and in 4  
sizes in 4-pole models.  
Lighting contactors are available in 11  
sizes from 20 through 600 amperes in 2-  
and 3-pole models and in 3 sizes in 4-  
pole models. Lighting contactors are  
especially designed to switch ballast  
type, tungsten, and other discharge type  
lighting loads. These contactors may be  
controlled by timers and other pilot  
devices.  
These contactors are also available with a  
DC coil and rectifier for reduction of AC  
hum in noise-sensitive areas such as hos-  
pitals, schools, and similar locations.  
For information and availability of  
mechanically held lighting contactors,  
contact your local sales office.  
0
thru  
21/2  
8.6  
218  
0.217  
0.125  
0.108  
0.094  
0.054  
0.043  
0.425  
0.245  
0.215  
0.183  
0.112  
0.085  
0.96  
3, 31/2  
14  
22  
310  
510  
26  
51  
4
0.48  
41/2, 5  
63  
40  
1518  
350  
116  
60  
0.24  
0.193  
0.25  
0.12  
6
0.10  
Table 15.14 Reference Literature  
Instruction Sheets and Replacement Parts  
NEMA  
Size  
00  
Motor Matched  
Half Size  
—
Instruction Sheet  
PM-60.1  
Replacement Parts  
14-GBG  
0-1  
2
3
13/4  
21/2  
31/2  
PM-60.1  
PM-60.1  
PM-60.1  
14-GEP  
14-GFP  
14-GHP  
15  
4
5
6
PM-60.1  
PM-60.1  
PM-60.1  
14-GJG  
41/2  
14-GKF-B  
14-GMF-B  
21-GWE  
Class 21 Lighting Contractor  
Competitive Product Comparison  
Size 1 Starters 14-PC2  
Furnas The Right Choice Form 1485  
Specifying a NEMA Rated Starter Form 1555  
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Specification Guide  
292  
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AC Controls  
Lighting and Heating Contactors  
Dimensions  
Table 15.15 Type CLH Multi-Pole Electrically-Held Lighting  
and Heating Contractors (Open Type)  
Dimensions In Inches (mm)  
No. of  
Poles  
Ampere  
Rating  
Height (H)  
Width (W)  
1.77 (45)  
6.88 (175)  
1.77 (45)  
Depth (D)  
3.93 (99.82)  
4.23 (107.44)  
4.44 (112.77)  
2/4  
6/8 10/12  
3
6/9  
12  
3
6/9/12  
2.95 (75)  
20  
30  
30  
2.95 (75)  
6.88 (175)  
8.85 (225)  
3.54 (90)  
15.47 (393)  
3.93 (100)  
5.31 (135)  
5.70 (145)  
6.29 (160)  
2.95 (75)  
4.60 (117)  
15.98 (406)  
5.23 (133)  
7.08 (133)  
7.87 (200)  
7.87 (200)  
4.44 (112.77)  
60  
100  
200  
300  
400  
3
3
3
3
5.51 (140)  
7.28 (185)  
7.79 (198)  
8.74 (222)  
Table 15.16 Type CLB, CLF, CLN 3-Pole Electrically-Held Combination Lighting and Heating Contactors  
(Combination Fusible, Non-Fusible, or Circuit Breaker)  
Dimensions In Inches (mm)  
NEMA 1 Enclosed  
Height (H)  
NEMA 3R / 12 Enclosed  
Ampere  
Rating  
No. of  
Poles  
Width (W)  
Depth (D)  
Height (H)  
Width (W)  
Depth (D)  
20  
30  
60  
3
24.0 (610)  
10.0 (254)  
8.0 (203)  
24.0 (610)  
10.0 (254)  
8.0 (203)  
100  
200  
300  
3
3
3
24.0 (610)  
36.0 (914)  
48.0 (1219)  
20.0 (508)  
24.0 (610)  
30.0 (762)  
8.0 (203)  
12.5 (318)  
12.5 (318)  
24.0 (610)  
36.0 (914)  
48.0 (1219)  
20.0 (508)  
24.0 (610)  
30.0 (762)  
8.0 (203)  
12.5 (318)  
12.5 (318)  
Table 15.17 Type CLH Multi-Pole Electrically-Held Lighting and Heating Contactors  
Dimensions In Inches (mm)  
NEMA 1 Enclosed  
Height (H)  
14.06 (357)  
10.05 (255)  
14.06 (357)  
14.06 (357)  
20.0 (508)  
20.0 (508)  
22.0 (559)  
32.0 (813)  
32.0 (813)  
NEMA 3R / 12 & 4 Enclosed  
Ampere  
Rating  
No. of  
Poles  
Width (W)  
6.81 (173)  
5.56 (141)  
6.81 (173)  
6.81 (173)  
16.0 (406)  
9.0 (229)  
10.5 (267)  
18.0 (457)  
18.0 (457)  
Depth (D)  
6.65 (169)  
5.33 (135)  
6.65 (169)  
6.65 (169)  
9.88 (251)  
Height (H)  
Width (W)  
Depth (D)  
20  
30  
30  
60  
60  
100  
200  
300  
400  
2–12  
3
6 / 9 / 12  
3
15.0 (381)  
10.75 (273)  
6.48 (165)  
15.0 (381)  
10.75 (273)  
6.48 (165)  
6–12  
22.0 (559)  
22.0 (559)  
32.0 (813)  
32.0 (813)  
32.0 (813)  
11.0 (279)  
11.0 (279)  
18.0 (457)  
18.0 (457)  
18.0 (457)  
7.8 (198)  
7.8 (198)  
11.0 (279)  
11.0 (279)  
11.0 (279)  
3
3
3
3
7.72 (196)  
11.0 (279)  
11.0 (279)  
Table 15.18 Type CLM Multi-Pole Mechanically-Latched 20 Ampere Lighting and Heating Contactor  
Dimensions In Inches (mm)  
NEMA 1 Enclosed  
Height (H)  
NEMA 3R / 12 & 4 Enclosed  
Ampere  
Rating  
No. of  
Poles  
Width (W)  
Depth (D)  
Height (H)  
Width (W)  
Depth (D)  
20  
2–12  
14.06 (357)  
6.81 (173)  
6.65 (169)  
15.0 (381)  
10.75 (273)  
6.48 (165)  
15  
20 Ampere CLM Open Contactor  
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Specification Guide  
CSI Section 16160  
293  
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AC Controls  
Compact Magnetic Contactors Lighting  
General  
Electrically Held, 20A 60H  
z
480VAC Max Tungsten, 600VAC Ballast  
Table 15.19 21WE 2-12 Pole  
Table 15.20 Adder Decks  
Type  
50 Hz  
1 NO  
1 NC  
2 NO  
1 NO & 1 NC  
2 NC  
2 NO  
2 NC  
4 NO  
2 NO & 2 NC  
4 NC  
Part No.  
21WS10  
21WS01  
21WS20  
21WS11  
21WS02  
21WT20  
21WT02  
21WT40  
21WT22  
21WT04  
Nema 1  
General Purpose  
Contacts  
Normally  
Open  
Open Type  
Side Mounted Light Power Pole  
Normally  
Closed  
Poles  
Cat No.  
Cat No.  
21WE20A*  
21WE30A*  
21WE40A*  
21WE31A*  
21WE22A*  
21WE60A*  
21WE42A*  
21WE80A*  
21WE62A*  
21WE44A*  
21WE90A*  
21WE72A*  
21WE54A*  
21WE100A*  
21WE82A*  
21WE64A*  
21WE120A*  
21WE102A*  
21WE84A*  
21WE20B*  
21WE30B*  
21WE40B*  
21WE31B*  
21WE22B*  
21WE60B*  
21WE42B*  
21WE80B*  
21WE62B*  
21WE44B*  
21WE90B*  
21WE72B*  
21WE54B*  
21WE100B*  
21WE82B*  
21WE64B*  
21WE120B*  
21WE102B*  
21WE84B*  
2
3
4
4
4
6
6
8
8
8
9
9
9
10  
10  
10  
12  
12  
12  
0
0
0
1
2
0
2
0
2
4
0
2
4
0
2
4
0
2
4
2
3
4
3
2
6
4
8
6
4
9
7
5
10  
8
6
12  
10  
8
Top Mounted Light Power Pole  
Table 15.21 2-12 Pole Dimensions  
Dimensions in Inches (mm)  
A
No. of  
Poles  
B
2.00  
(51)  
2.00  
(51)  
B1  
C
3.44  
(87)  
C1  
4.88  
—
—
2–4  
6–8  
(124)  
4.88  
(124)  
4.50  
(114)  
4.50  
(114)  
—
—
—
4.88  
(124)  
2.25  
(57)  
—
10–10  
Wiring Diagrams (Typical)  
Open Type  
2-4 Pole  
5-8 Pole  
9-16 Pole  
Optional  
Power  
Poles  
15  
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Specification Guide  
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AC Controls  
Lighting and Heating Contactors  
Dimensions  
CLM Contactors — 30 to 200 Ampere  
Figure 1  
Figure 2  
Table 15.22 Type CLM Magnetically Latched 30A to 200A Lighting and Heating Contactors — Open Type  
Dimensions In Inches (mm)  
Ampere  
Rating  
No. of  
Poles  
Figure  
No.  
Shipping  
Weight in lbs. (kg)  
A
B
C
D
E
F
G
2–4  
5
2–3  
4–5  
2–3  
4–5  
3.31 (84)  
4.19 (106)  
3.31 (84)  
5.06 (129)  
4.62 (117)  
7.25 (184)  
1.65 (42)  
2.09 (53)  
1.65 (42)  
2.53 (64)  
2.31 (59)  
3.62 (92)  
3.95 (100)  
3.48 (88)  
3.95 (100)  
3.48 (88)  
3.3 (2)  
4.5 (2)  
3.3 (2)  
4.5 (2)  
9.3 (4)  
13.0 (6)  
30  
60  
4.61 (117)  
1
4.38 (111)  
0.23 (6)  
1.50 (38)  
4.94 (125)  
6.75 (171)  
2
100 / 200  
6.00 (152)  
6.62 (168)  
0.38 (10)  
1.88 (48)  
CLM Contactors — 300 and 400 Amperes, 2- and 3-Pole  
15  
Dimensions in inches (mm) for reference purposes only.  
Siemens Electrical Products and Systems  
Specification Guide  
CSI Section 16160  
295  
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AC Controls  
Manual Starters and Switches  
General  
Type CLM Magnetically-Latched, 30-400A  
Type CLM Magnetically-Latched, 20A  
Multi-Pole  
Type CLM Electrically-Held (20-400A)  
Description  
Combination lighting contactors are well  
suited for industrial, highway and area  
lighting applications, or where a lighting  
circuit may have to be disconnected for  
periodic maintenance. They may also be  
used for resistance heating loads.  
CLH Lighting Contactors  
AC lighting contactors provide a safe con-  
venient means of local or remote switch-  
ing of relatively large tungsten, fluores-  
cent or mercury arc lamp loads.  
Siemens AC lighting contactors are  
designed to withstand the large initial  
inrush currents of tungsten lamp loads  
without the contacts welding. They are  
fully rated contactors and do not require  
any derating as do standard motor con-  
trol contactors. They are UL Listed and  
CSA Certified.  
Class CLH electrically-held lighting con-  
tactors provide a safe convenient means  
of local or remote switching for tungsten  
and ballast lamp loads, mercury arc  
lamps, 3 phase resistive heating, 480  
volts line to line, 277 volts line to neutral.  
Available in 20 ampere through 400  
ampere sizes in NEMA Type 1, 3R / 12, 4  
stainless steel, 4X non-metallic type  
enclosures and open type. The CLH con-  
tactors are available in 2–12 pole 20  
ampere, 3–12 pole 30 and 60 ampere  
and 3 pole in 100–400 ampere sizes. UL  
Listed and CSA certified.  
CLM Lighting Contactors  
The CLM Lighting Contactors can be  
used with metal halide, mercury vapor,  
quartz halogen, tungsten, and fluorescent  
lighting. They provide reliable and conve-  
nient lighting control in numerous applica-  
tions, such as industrial plants, schools,  
hospitals, office buildings, shopping cen-  
ters, airports, stadiums, etc. The CLM’s  
are listed under UL 508 with no derating  
when used open or enclosed. Optional  
solid-state control modules are available  
to allow control of the CLM lighting con-  
tactors directly from energy management  
systems, microprocessors, photoelectric  
cells, timers, and similar control devices.  
They permit programmable time schedul-  
ing of loads, automatic control of lighting  
near windows to allow the use of natural  
ambient lighting levels, and manual over-  
ride of all lighting circuits from any num-  
ber of local control stations or from a  
central location. These optional modules  
are integrally mounted onto the base of  
the lighting contactor.  
Magnetic Latch Operation  
A permanent magnet is built into the con-  
tactor structure of the 30,60,100, and  
200 ampere contactors that will maintain  
the contactor in its energized state indefi-  
nitely without using control power. When  
energized, a DC current is applied that  
produces a magnetic field that reinforces  
the polarity of the permanent magnet,  
and the contactor pulls in immediately.  
The current to the coil is disconnected by  
the coil clearing interlock. In order to drop  
out the contactor it is necessary to apply  
a field through the OFF coil in the reverse  
direction to the permanent magnet. This  
momentarily cancels the magnetic attrac-  
tion and the contactor drops out.  
Table 15.24  
CLH Lighting Contactors  
3-Phase Tungsten 3-Phase Non-  
and Ballast Lamp Motor Loads  
Loads  
3-Phase Mercury  
480V Line to Line ARC Lamps  
No.  
of  
277V Line to  
Neutral  
3-Phase Resistive  
Heating  
Poles  
2, 3, 4,  
6, 8, 10,  
12  
3, 6,  
9 & 12  
3, 6,  
9 & 12  
3
3
3
3
20  
20  
30  
60  
30  
60  
100  
200  
300  
400  
100  
200  
300  
400  
Cu / AI terminals are provided as stan-  
dard except on 30 ampere devices which  
are for copper wire only.  
Combination Lighting and Heating  
Features:  
½ Disconnect Switch and Circuit Breaker  
Table 15.23 20 Ampere CLM  
Max. AC Voltage and Ampere Ratings  
Poles to Load  
Types  
Ballast Load:  
600 volts AC, breaking all lines. Tungsten  
Lamp Loads, Max. Volts:  
½ Rugged Flange Mounted Handle  
½ Easy Installation  
½ Occupies Less Space  
½ Increased Operator Protection  
½ Room To Spare for Modifications  
½ Class R Fuses Standard  
½ Electrically and Mechanically Held  
½ 30–300 Amperes  
Load  
Type  
Amps  
2 for 1-Phase  
Cont. 1 for 1-Phase 3 for 3-Phase  
Line-to-Line, 480 AC  
Line-to-Neutral, 277 AC  
Tungsten 20  
250V AC  
347V AC  
347V AC  
—
600V AC  
600V AC  
15  
Ballast  
20  
30  
General  
Combination Lighting Contactors  
It is desirable to install the branch circuit  
protective device and lighting contactor,  
combining switching and over-current  
protection, in one enclosure.  
Max. DC Voltage and Ampere Ratings  
Poles to Load  
2 in Series  
Load  
Type  
Amps  
Cont.  
3 in Series  
General  
20  
125V DC  
250V DC  
½ UL Listed  
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Specification Guide  
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AC Controls  
Combination Starters (NEMA Sizes 0–4)  
General / Dimensions  
Combination Starter With ETI  
Circuit Breaker  
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.  
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.  
Combination Starter With Type MCS  
Disconnect Switch  
Table 15.25 3-Phase Magnetic  
Motor Starter  
Dimensions  
Table 15.26 Magnetic Motor Starter  
Dimensions in Inches (mm)  
NEMA  
Starter  
Size  
0
1
Maximum Horsepower  
Half  
Size  
0
1
1 3⁄4  
2
2 1⁄2  
3
3 1⁄2  
4
Size  
A
B
C
200V  
3
7.5  
10  
230V 460/575V  
0–13⁄4  
NEMA 1  
General  
23.25  
(591)  
11.00  
(279)  
7.63  
(194)  
3
7.5  
5
10  
Purpose  
Standard  
Width 0–4  
26.75  
(679)  
31.50  
(800)  
12.13  
(308)  
12.50  
(318)  
7.63  
2, 21⁄2  
3
1 3⁄4*  
10  
15  
(194)  
2
2 1⁄2  
10  
15  
25  
30  
15  
20  
30  
40  
50  
25  
30  
50  
75  
7.63  
(194)  
*
NEMA 1  
3
3 1⁄2  
General  
*
48.97  
(1244)  
12.13  
(308)  
9.94  
(252)  
31⁄2, 4  
Purpose  
Standard  
4
40  
100  
Width 31⁄2–4  
0–21⁄2  
3
29.50  
(749)  
12.13  
(308)  
7.69  
NEMA 12  
Industrial  
Use  
(195)  
34.25  
(870)  
12.50  
(318)  
7.69  
(195)  
Standard  
Width 0–4  
NEMA 12  
Industrial  
Use  
48.94  
(1243)  
19.13  
(486)  
9.94  
(252)  
31⁄2, 4  
Standard  
Width 31⁄2–4  
15  
Siemens Electrical Products and Systems  
Specification Guide  
CSI Section 16160  
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AC Controls  
Contactors — Non-Reversing  
General  
NEMA Size 1  
NEMA Size 3  
NEMA Size 5  
Type 3TF Non-Reversing AC Contactors  
Key Features  
½ Fully NEMA Rated Sizes 00–8  
½ Double Break Contacts  
½ Lowest Contact Bounce (2  
½ Color-Coded Coils  
Milliseconds or less on Most Sizes)  
½ Fast Termination System — Wire  
Funnels, Wire Stops, Screwdriver  
Guide Holes, and Captive Hardware  
½ Long Mechanical Life  
— 15 Million (Size 00)  
— 10 Million (Size 0–5)  
— 5 Million (Size 6–8)  
½ Touch Safe Power Terminals  
(Sizes 00–3)  
½ Silver Tin Oxide Contacts, Cadmium-  
½ Touch Safe Control Terminals  
Free (Sizes 00–5)  
(Sizes 00–5)  
½ Higher Locked Rotor Current Ratings,  
½ Snap-on 2 NO and 2 NC Auxiliary  
Up to 840% (Sizes 00–5)  
Contacts Standard (Sizes 00–5)  
½ Arc Chutes with Arc Splitters; Fast Arc  
½ UL Listed and CSA Certified  
½ Visual ON / OFF indicator  
Quenching  
.
Table 15.27 Contactor Technical Data  
NEMA Size  
00  
Measured Parameter  
0
1
2
3
4
5
6
7
8
10  
9
600  
1.5  
1.5  
1.5  
2
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
50/60  
68/87  
10/12  
20  
18  
600  
3
3
5
30  
27  
50  
45  
600  
10  
15  
25  
25  
5
100  
90  
600  
25  
30  
50  
50  
10  
20  
40  
50  
17  
34  
68  
86  
27  
53  
67  
4.1  
8.1  
16  
20  
12  
14  
28  
35  
150  
135  
600  
40  
50  
75  
100  
15  
30  
60  
75  
26  
68  
105  
130  
40  
300  
270  
600  
75  
100  
150  
200  
30  
600  
540  
600  
150  
200  
300  
400  
60  
120  
240  
300  
105  
210  
415  
515  
160  
320  
400  
27  
900  
810  
600  
—
300  
—
1350  
1215  
600  
—
450  
—
900  
ቢ
Ampere Rating (Open)  
Ampere Rating (Enclosed)  
Maximum Voltage Rating  
Squirrel Cage  
Motor Maximum  
Horsepower  
Amps  
Amps  
Volts  
600  
7.5  
7.5  
10  
10  
3
200 V, 60 Hz  
230 V, 60 Hz  
380 V, 50 Hz  
460–575 V, 60 Hz  
120 VAC  
240 VAC  
480 VAC  
600 VAC  
120 VAC  
240 VAC  
480 VAC  
600 VAC  
240 VAC  
480 VAC  
600 VAC  
120 VAC  
240 VAC  
480 VAC  
600 VAC  
208 VAC  
240 VAC  
480 VAC  
600 VAC  
Overall  
HP  
5
600  
90  
—
—
—
—
—
—
—
—
—
—
—
0.6  
1.2  
2.4  
3
Resistive  
Heating  
(1-Phase  
2-Pole)  
ቢ
6
10  
20  
25  
60  
180  
360  
450  
155  
315  
625  
775  
240  
480  
600  
41  
kW  
ቢ
12  
15  
5
10  
20  
25  
—
—
—
1.2  
2.4  
4.9  
6.2  
3.6  
4.3  
8.5  
11  
50/60  
101/32  
120  
150  
52  
105  
210  
260  
80  
160  
200  
14  
27  
54  
68  
41  
47  
94  
ቢ
ቢ
8.5  
Resistive  
Heating  
(3-Phase  
3-Pole)  
ቢ
17  
34  
43  
12  
25  
31  
2.1  
4.1  
8.3  
10  
6.3  
7.2  
14  
18  
kW  
ቢ
ቢ
360  
720  
900  
61  
122  
244  
304  
182  
210  
420  
525  
60  
Capacitor  
Switching  
(3-Phase)  
80  
KVAR  
kVA  
100  
6.8  
14  
27  
34  
30  
23  
47  
59  
Transformer  
Switching  
(1-Phase  
2-Pole)  
54  
81  
108  
135  
81  
162  
203  
122  
140  
280  
351  
60  
1.8  
2.1  
4.2  
5.2  
50/60  
101/32  
Transformer  
Switching  
(3-Phase  
3-Pole)  
94  
kVA  
188  
1350  
60  
2900  
105  
117  
50/60  
2450/2960  
115/146  
50/60  
183/233  
17/21  
50/60  
330/410  
32/39  
50/60  
910/1090  
58/70  
AC Coil  
Ratings  
Hz  
VA  
VA  
4000  
140  
4200  
100  
Inrush  
Sealed  
12.1/16.1 12.1/16.1  
Operating  
to 10% overvoltage,  
Times  
(warm or cold coil) Total  
Opening Time Includes  
Arcing Time Closing Delay  
MS  
10–35  
15–30  
13–67  
15–20  
13–67  
15–20  
15–40  
15–35  
20–50  
15–35  
20–50  
20–40  
17–65  
18–30  
30–50  
30–50  
40–80  
(valid for 20%  
Undervoltage)  
15  
10–20  
—
10–20  
—
140–240  
—
Operating  
5.5/5 3.2/10 5.7/5 9/5 5.7/5 9/5 9.2/5 4.8/10 8.6/5 4.8/10 10.4/5 5.8/10 8.8/5 4.9/10  
(2) 14–10 (2) 14–3  
(2) 18–12 (2) 18–12 (2) 18–12 (2) 18–12  
15  
4
Resistance To Shock (Rectangular pulse)  
Conductor size/phase  
Auxiliary Contact Wire Size  
Mechanical Life (make/break operations)  
Total Auxiliary Contacts Available  
Auxiliary Contact Rating A600/P600  
G/MS  
AWG  
AWG  
MILL  
10–1/0  
10–1/0  
10–1/0  
(2) 18–12  
10  
8
YES  
2-300MCM 1-500MCM (2) 4–500 (3) 2–600MCM (4) 2/0–500MC  
(2) 18–12  
10  
8
YES  
(2) 18–12 (2) 18–12  
10  
8
(2) 18–12  
(2) 18–12  
10  
4
YES  
10  
4
YES  
10  
8
YES  
5
8
YES  
5
8
YES  
5
8
YES  
YES  
YES  
ቢ
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AC Controls  
Magnetic Motor Starters — Full Voltage Non Reversing  
Starters  
Size 0–13⁄4  
With ESP100 Solid State Overload  
Size 0–13⁄4  
With Melting Alloy Overload  
Size 0–13⁄4  
With Bimetal Overload  
These controls are available in NEMA  
sizes 00 through 6. ESP100 starters are  
available in NEMA sizes 0 through 6. In  
addition to the usual NEMA starter sizes,  
½
½
Overload is self powered and  
requires no hard wiring or separate  
power source.  
Simple, versatile adjustment;  
over a 2:1 FLA adjustment range.  
Extendable to 4:1 with looping  
option.  
Heaterless construction minimizes  
energy costs and the costs of cabinet  
ventilation or cooling.  
Class 20 protection is standard. Class  
10 and 30 protection are available.  
Key Features (Cont’d)  
½
½
½
½
½
½
½
Rugged Industrial Design  
Dual Voltage, Dual Frequency Coils  
Overload Test Feature  
Front Removable Auxiliary Contacts  
Wide Range of Accessories  
Easy Coil Access  
four exclusive Half Sizes—13  
and 41  
sizes offer the same rugged, industrial  
⁄
4, 21  
⁄
2, 31  
⁄
,
2
⁄2—are offered. These integral  
construction as NEMA sizes, and ensure  
efficient operating performance. Half  
Sizes provide a real cost savings by cut-  
ting down on over capacity when NEMA  
sizes exceed the motor ratings.  
Across the line or full voltage starting is  
used when motor starting torque can be  
applied safely and current inrush does  
not produce an objectional voltage drop.  
All starters are supplied with a NO hold-  
ing contact that in conjunction with an  
appropriate pilot device will provide low  
voltage protection or release.  
½
Widest Selection of Overloads in  
the Industry  
½
½
½
Solid State, Melting Alloy, Bimetal, or  
Bimetal Ambient Compensated  
Overload Protection  
Provides motor protection to  
50 / 60 Hertz.  
½
½
½
½
½
½
½
Exclusive Half Sizes  
Straight Through Wiring  
Gravity Dropout  
Large Silver Cadmium Contacts  
UL Listed 508 File #E14900  
CSA Certified File #LR6535  
Universal Mounting Plate  
Features  
Size 0–6 Magnetic Starters include the  
following standard features:  
Application  
Molded Coil — Magnetic coils are care-  
fully wound and then sealed in epoxy.  
Encapsulation helps seal out moisture,  
promotes heat transfer, and resists elec-  
trical, mechanical, and thermal stresses.  
Dual Voltage / Dual Frequency Coil —  
Starters are available with dual voltage,  
dual frequency coils. They are designed  
to operate on either 50 or 60 Hertz.  
Class 14 industrial magnetic starters are  
designed for across-the-line starting of  
single-phase and polyphase motors.  
ESP100 starters combine the rugged  
characteristics of a NEMA rated contac-  
tor with a solid state overload which  
provides phase loss protection. It offers  
the industrial user greater protection  
and added life for motors in heavy duty  
applications. The inherent benefits of the  
ESP100 result in cost savings as well.  
Thermal Overload Relays — Melting  
alloy is supplied as standard; optional  
bimetal overload relay is available.  
ESP100 Solid State Overload Relays —  
These standard features of the ESP100  
provide Extra Starter Performance.  
Ambient compensated bimetal version is  
also available. Bimetal types are convert-  
ible from manual to automatic reset and  
can be furnished with standard or quick  
trip heater elements. Melting alloy over-  
loads include a trip indicator and manual  
test feature. An isolated normally open or  
normally closed contact is available for  
use on melting alloy overloads. Bimetal  
overloads are also available with NC and  
NO (SPDT) Form C contacts.  
Starter with thermal overload relays  
(together with the proper heater ele-  
ments) help provide protection to motor  
windings from harmful currents and the  
resultant temperature rise that may be  
caused by overloading the motor, sus-  
tained low line voltage, or stalled rotor.  
½
½
½
½
True phase loss protection; trips  
within 3 seconds.  
High accuracy trip curves; 2%  
repeat trip accuracy.  
Ease of use. Mount, wire and set  
FLA.  
Overload is self protected against  
short circuits.  
15  
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AC Controls  
Magnetic Motor Starters—Full Voltage Non Reversing  
General  
Table 15.28 Coil Data  
Auxiliary Equipment  
Inrush  
Normal  
(Sealed Magnet)  
½
Starters are available with built-in  
START / STOP pushbuttons for 3-wire  
control or a HAND / OFF / AUTO  
selector switch for 2-wire control.  
Field modifications such as auxiliary  
electrical contacts, pilot lights, push-  
buttons, selector switches, and fuse  
blocks for low voltage pilot control  
are available to meet specific applica-  
tion requirements.  
(Open Magnet)  
Class 14  
Size  
Watts  
Volts  
Amps  
VA  
Amps  
VA  
24  
120  
208  
240  
277  
480  
600  
24  
120  
208  
240  
277  
480  
600  
24  
120  
208  
240  
277  
480  
600  
120  
208  
240  
277  
480  
600  
2.63  
.59  
.34  
.305  
.25  
1.49  
.121  
.37  
.08  
.05  
.045  
.03  
.02  
.02  
½
00  
13.3  
70  
10  
9.08  
1.82  
1.05  
.91  
1.04  
.21  
0
.12  
½
½
Normally open or normally closed  
fifth power pole kits are available for  
8.6  
218  
.105  
.090  
.052  
.042  
25  
thru  
21⁄2  
.79  
sizes 0 through 13⁄4  
.
.45  
.36  
Transformers and pneumatic timers  
can be ordered as either factory or  
field modifications. In some cases  
these may require a larger enclosure.  
A full line of replacement parts are  
available including contact kits, coils,  
overload relays, and heater elements.  
12.9  
2.58  
1.49  
1.29  
1.12  
.646  
.516  
4.25  
2.45  
2.14  
1.77  
1.08  
.85  
1.08  
.217  
.125  
.108  
.094  
.054  
.043  
.425  
.245  
.215  
.183  
.112  
.085  
3, 31⁄2  
14  
22  
310  
510  
26  
51  
½
Size 0 through 4  
The following features are characteristics  
of Sizes 0 through 4.  
4
120  
240  
480  
600  
240  
480  
600  
12.65  
6.32  
3.16  
2.53  
1.45  
.73  
.58  
.96  
.48  
.24  
.193  
.25  
.12  
.10  
Gravity Dropout — For added reliability,  
the gravity dropout of the armature and  
contacts is assisted by stainless steel  
springs which help provide quick, precise  
opening of the contacts. Also provides  
straight through wiring.  
41⁄2, 5  
63  
40  
1518  
350  
116  
60  
6
45 Degree, Wedge Action — The 45  
degree, wedge action contacts reduce  
tracking and provide faster arc quench-  
ing. The resulting self cleaning and  
reduced contact bounce mean cooler  
operation and longer life for the large  
silver cadmium oxide contacts.  
Terminal Design — Control terminals  
are self rising pressure type.  
Auxiliary Contacts — Front mounted as  
well as side mounted auxiliary contacts  
are available. A maximum of four can be  
mounted on sizes 0 through 13⁄4, three  
on Sizes 2 through 6.  
15  
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Magnetic Contactors  
Dimensions / Wiring Diagrams  
Fig 1a  
Fig 1b  
Fig 2  
Side Mounted  
Aux Contact  
B1 Front Mounted Aux  
Contact  
B2 Aux Contact and 1  
Aux Power Pole  
Right or Left Side  
Optional  
Electrical  
Contacts  
Table 15.29 Contactor Dimensions  
Dimensions in Inches (mm)  
NEMA  
Size  
Half  
Size  
Type  
Figure  
A
B
C
1a  
1b  
1b  
1b  
1b  
1b  
1b  
2
00  
0–1  
3.75 (95)  
4.31 (109)  
4.31 (109)  
4.88 (124)  
5.50 (140)  
4.75 (121)  
4.75 (121)  
4.25 (110)  
3.19 (81)  
3.75 (95)  
13/4  
21/2  
31/2  
41/2  
3.75 (95)  
4.00 (102)  
2
3
4
4.88 (124)  
6.13 (156)  
6.13 (156)  
7.81 (198)  
17.38 (441)  
17.38 (441)  
22.50 (572)  
4.50 (114)  
5.50 (140)  
5.50 (140)  
5.50 (140)  
—
4.00 (102)  
5.06 (129)  
5.06 (129)  
5.75 (146)  
7.88 (200)  
Open  
2
2
2
5
6
—
—
7.88 (200)  
10.00 (254)  
2 Pole Single Phase Magnetic Contactors  
Size 00  
Sizes 0–13/4  
Sizes 2–31/2  
3 Pole 3 Phase Magnetic Contactors  
Size 00  
Size 0–4  
Size 41/2, 5  
Size 6  
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Magnetic Contactors  
Enclosures  
Dimensions  
Table 15.30 Enclosure Dimensions  
Outline Dimensions  
Figure 2  
Figure 1  
A
B
C
Fig  
Size  
00  
0–1 /4  
95/8  
11  
61/6  
4
15/16  
3
1
2, 2a  
3
1
6 /4  
4 /8  
NEMA 1  
General  
Purpose  
Enclosures  
1
1
2, 2 /2  
13 /2  
19  
26  
7
13/16  
411/16  
61/8  
79/16  
109/16  
119/16  
51/2  
2, 2a  
2, 2b  
3, 3b  
3, 3a  
3
4
4
4
4
3, 3 /2  
111/4  
131/8  
179/16  
219/16  
73/4  
1
4
41/2, 5  
3913/16  
4513/16  
13  
6
0–11/2  
2, 21/2  
3
31/2–4  
41/2–5  
6
16  
26  
26  
81/8  
61/8  
NEMA 3  
Weatherproof  
Enclosures  
131/8  
131/8  
179/16  
219/16  
73/4  
7
7
13/16  
13/16  
3913/16  
4513/16  
13  
105/8  
121/4  
55/16  
4
4
5
3
0–1 /4  
1
1
1
5
0–2 /2  
16  
8 /8  
6 /16  
NEMA 4  
Watertight  
Enclosures  
1
9
5
5
5
5
3
26  
26  
3913/16  
4513/16  
117/8  
13 /8  
7 /16  
1
3 /2–4  
131/8  
179/16  
219/16  
75/16  
79/16  
41/2, 5  
6
0–2  
2
21/2  
3, 31/2  
4
0–2 /2  
3, 31/2  
4
109/16  
119/16  
67/8  
6
NEMA 4X  
Watertight  
Corrosion  
Resistant  
Enclosures  
Bimetal  
1411/16  
233/4  
233/4  
145/8  
223/4  
281/2  
43  
117/8  
117/8  
117/8  
91/8  
131/4  
171/2  
19  
73/4  
81/8  
131/8  
179/16  
219/16  
67/8  
67/8  
91/4  
81/2  
6
6
6
7
7
7
8
9
9
9
9
9
Figure 3  
Figure 4  
1
NEMA 7 & 9  
Hazardous  
Location  
91/4  
111/4  
121/4  
57/16  
61/16  
79/16  
109/16  
119/16  
Enclosures  
41/2, 5  
3
0–1 /4  
2, 21/2  
13  
16  
26  
3913/16  
4513/16  
NEMA 12  
Industrial  
Use  
3–4  
41/2–5  
6
Enclosures  
Dimensions for reference, not for construction.  
Figure 2a  
Fig 1c  
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Magnetic Contactors  
Enclosures  
Dimensions  
Fig 3a  
Figure 5  
Fig 3b  
Figure 6  
Figure 7  
Figure 8  
Figure 9  
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AC Controls  
Full Voltage, Non-Reversing Starters (NEMA Sizes 6-8)  
General / Dimensions  
Features  
Ratings  
Table 15.31 FVNR Starter Ratings  
½ Ambient Compensation from –25°C to  
+55°C.  
Maximum 3-Phase HP Ratings  
½ Wide Adjustable Current Tripping  
at Motor Voltages  
NEMA  
Size  
Range.  
200V  
230V  
200  
300  
460V  
400  
600  
575V  
400  
600  
6
7
8
½ Detection of Overload, Phase Loss  
150  
and Phase Unbalance.  
450  
900  
900  
½ Isolated Contacts, 1-Normally Closed  
and 1-Normally Open Alarm Circuit  
Contact.  
Dimensions  
½ Reset Button with Trip-Free Feature.  
½ Clear Plastic Sealable Cover to  
Prevent Unauthorized Tampering.  
½ UL Listed and CSA Certified.  
Starter Types  
SXL: Full Voltage, across the line Non-  
Reversing  
SRL: Full Voltage, across the line  
Reversing  
SCN: Full Voltage, across the line Non-  
Reversing, combination Non-  
Fusible  
NEMA Size 6-8, Class SXL, Full Voltage,  
Non-Reversing Starters  
Full Voltage Starters  
SCF: Full Voltage, across the line Non-  
Reversing, combination Fusible  
3-Phase 250 to 900 HP, Non-Reversing  
and Reversing 50 / 60 Hz., NEMA Sizes  
6–8 Full Voltage Starters are used for  
across the line starting of squirrel-cage  
induction motors and the primary control  
functions for wound rotor motors. In  
addition, they can be used for control of  
power for static or resistive loads such  
as lighting and heating. They provide  
the lowest cost, least maintenance, and  
minimum space requirements of any  
magnetic starters where inrush current  
limitations do not restrict their use. UL  
Listed and CSA Certified.  
SCB: Full Voltage, across the line Non-  
Reversing, combination Circuit  
Breaker  
Note:Class designation revision (effec-  
tive late 1994) does not affect  
starter designs.  
Table 15.32 Non-Reversing and  
Reversing Starters  
Starter  
Dimensions in inches (mm)  
NEMA  
Size  
Type  
A
B
C
Non-Reversing Starter  
Class: SXL, SCN, SCF, SCB  
Without  
Short  
New  
Old  
XL  
XR  
XLN  
XLF  
XLB  
6
7
8
6
7
8
6
7
8
76 (1930) 30 (762)  
90 (2286) 30 (762)  
24 (610)  
24 (610)  
*
24 (610)  
24 (610)  
*
24 (610)  
24 (610)  
*
SXL =  
SRL =  
SCN =  
SCF =  
SCB =  
Circuit  
*
*
Protection  
With  
Fusible  
Disconnect  
76 (1930) 30 (762)  
90 (2286) 30 (762)  
*
*
With  
76 (1930) 30 (762)  
90 (2286) 30 (762)  
Molded  
Case  
Overload Protection  
*
*
Breaker  
Siemens solid-state overload relay protec-  
tion is provided standard for starter sizes  
6 through 8. Improvements in motor  
designs and manufacturing capabilities  
have resulted in decreasing physical  
motor size to obtain the same horse-  
power, making them more sensitive to  
overloads. Previous motors had a higher  
tolerance for overloads and made applica-  
tion of electromechanical overload relays  
satisfactory for protection. The bigger the  
motor, the more there is riding on mar-  
ginal protection and high rewind costs.  
Enclosures  
Reversing Starter Class: SRL  
Construction is all welded, with an elec-  
trostatically applied powder epoxy baked  
finish, in ANSI-61 light gray.  
Type 1: General Purpose  
Type 3R: Outdoor Raintight  
Type 12: Dusttight — Industrial Use  
Without  
Short  
6
7
8
90 (2286)  
90 (2286)  
24 (610)  
24 (610)  
30 (762)  
30 (762)  
Circuit  
Protection  
90 (2286) 44 (1118) 40 (1016)  
Type 4: Watertight Painted Sheet  
Steel  
15  
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AC Controls  
Multi-Speed Starters (NEMA Sizes 0–4)  
General / Dimensions  
Torque Characteristics  
Multi-speed motors are divided into three  
application groups:  
Ratings  
Table 15.33 3-Phase Multi-Speed  
Starter  
½
Constant Torque: HP output varies  
directly with speed, while torque  
remains constant. A constant torque  
motor rated 100 HP at 1200 rpm  
delivers 50 HP at 600 rpm. This type  
is applicable to conveyors, mills,  
dough mixers, reciprocating pumps,  
and other similar loads.  
NEMA  
Starter  
Size  
Maximum Horsepower  
Half  
Size  
200V  
3
230V  
3
460/575V  
5
0
1
7.5  
10  
10  
15  
25  
7.5  
10  
15  
20  
30  
10  
15  
25  
30  
50  
75  
100  
1 3⁄4*  
2
3
4
2 1⁄2  
*
½
½
Variable Torque: HP varies as square  
of speed, while torque varies directly  
with speed. A variable-torque motor  
rated 100 HP at 1200 rpm delivers 25  
HP at 600 rpm. This type is applicable  
to drives having fan or centrifugal  
pump characteristics.  
Constant Horsepower: Motor deliv-  
ers rated HP at all full-load speeds,  
while torque varies inversely as  
speed. This type is applicable to  
cutting tools, lathes, spindles, etc.  
3 1⁄2  
30  
40  
40  
50  
*
Full-voltage AC magnetic multi-speed  
controllers are designed to control recon-  
nectable squirrel-cage induction motors  
for operation at two, three or four differ-  
ent constant speeds depending on the  
construction of the motor. These con-  
trollers are available in combination and  
non-combination types.  
Dimensions  
The speed of an induction motor is a  
function of the supply frequency and the  
number of poles of the motor winding. To  
obtain different speeds with a fixed sup-  
ply frequency, the number of magnetic  
poles of the motor must be changed.  
Characteristics at any speed are similar to  
those of a single-speed motor. There are  
two basic methods for providing multiple  
combinations:  
Starter Types (NEMA Sizes 0–7)  
Single Winding (Consequent Pole)  
Variable Torque  
Single Winding (Consequent Pole)  
Constant Torque  
Single Winding (Consequent Pole)  
Constant Horsepower  
Table 15.34 Combination  
Multi-Speed Starter  
½
Separate-Winding Motors have a  
separate winding for each speed.  
This motor construction is relatively  
simple, and a wide variety of speeds  
can be selected. Separate winding  
motors with delta connected motor  
windings require one corner to be  
opened on each unused winding.  
Consequent-Pole Motors have a  
single winding for two speeds. Extra  
winding taps are brought out for  
reconnection for different numbers of  
stator poles. The controller is more  
complicated, and speed range is lim-  
ited to a 2-to-1 ratio.  
Two Winding (Separate Winding)  
Variable Torque  
Two Winding (Separate Winding)  
Constant Torque  
Two Winding (Separate Winding)  
Constant Horsepower  
Note — Reversing types, reduced  
voltage types, and three or four speeds  
are also available.  
Dimensions in Inches (mm)  
Size  
A
B
C
25.75  
(654)  
16.00  
(406)  
7.63  
(194)  
0–13⁄4  
NEMA 1  
General  
Purpose  
31.50  
(800)  
19.00  
(483)  
7.63  
(194)  
Enclosures 2–3  
½
28.50  
(724)  
16.00  
(406)  
7.69  
(195)  
0–13⁄4  
NEMA 12  
Industrial  
Use  
34.25  
(870)  
34.25  
(870)  
7.69  
(195)  
Enclosures 2–3  
Enclosures  
Type 1: General Purpose  
Type 3R: Outdoor Raintight  
Type 12: Dusttight — Industrial Use  
Two-speed consequent-pole motors have  
one reconnectable winding. Three-speed  
motors have two windings, one of which  
is reconnectable. Four-speed motors  
have two reconnectable windings. Each  
unused delta connected winding must  
have one corner open.  
Type 4: Watertight Stainless Steel or  
Watertight Painted Sheet Steel  
15  
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AC Controls  
Reduced Voltage Starters — Electromechanical  
General  
Auto Transformer Starter  
Wye Delta Starter  
Part Winding Starter  
Operation  
Operation  
Operation  
At starting, the auto transformer reduces  
motor terminal voltage to 50, 65, or 80  
percent of line voltage. For a timed inter-  
val, a segment of the transformer coil is  
connected in series (as an inductor) with  
the motor. Then a contactor automatically  
connects the motor across the line and  
shorts out the inductor.  
Initially the starter connects the motor  
on a Wye connection, reducing voltage  
across the winding to approximately  
58 percent. Starting torque and current  
is about 33 percent of across the line.  
After a time delay the motor is  
connected Delta.  
Part winding starters apply starting  
current in timed steps to part winding  
motors. Two step controllers apply volt-  
age through one starter to one motor  
winding followed by the second starter  
which connects voltage to the second  
winding. The timer may be adjusted to  
automatically close the second controller  
at the most favorable time to minimize  
voltage fluctuations.  
Auto Transformer Starter  
Wye Delta Starter  
Part Winding Starter  
Typical Speed Torque Curves  
Table 15.35 Comparison of Various Electromechanical Methods  
of Reduced Voltage Motor Starting  
Reduced Voltage Starting  
Autotransformerቢ  
Part Winding  
50%  
Tap  
65%  
Tap  
80%  
Tap  
Characteristics  
2 Step  
Wye(Star) Delta  
Starting current drawn from line as % of  
that which would be drawn upon full  
voltage starting ባ  
25%  
42%  
64%  
64%ቤ  
45%ቤ  
33%  
Starting torque developed as % of that  
which would be developed on full  
voltage starting  
Increased slightly with  
speed  
33%  
Smoothness of acceleration ብ  
15  
First in order of  
smoothness  
Third in order of  
smoothness  
Second in order of  
smoothness  
Allowable accelerating times (typical)  
30 seconds  
2-3 seconds  
Limited by  
motor design  
45-60 seconds  
Limited by  
motor design  
Based on NEMA  
medium duty  
transformers  
ቢ
Closed Transition.  
ባ
ቤ
ብ
Full voltage start usually draws between 500% and 700% of full load.  
Approximate values only. Exact values may be obtained from motor manufacturer.  
Solid state starters provide the smoothest starting characteristics.  
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AC Controls  
Solid-State Reduced Voltage Starters  
General  
Shorted SCRቢ  
Operation  
The solid state motor controller uses sili-  
If one or more shorted SCRs are detect-  
ed, the starter will not energize. A fault  
LED will light and if provided with a  
shunt trip, the main circuit breaker will  
trip.  
con controlled rectifiers (SCR’s) to control  
the voltage to the motor windings. Each  
SCR acts as a switch that can be turned  
on with any electronic trigger signal at  
any point on the voltage waveform and  
turns off when the current waveform  
crosses zero. Two SCR’s are used in a  
back-to-back arrangement in each phase  
to allow alternating current to pass to  
the motor.  
Pump Stopቢ  
This option eliminates water hammer in  
pumping systems, by giving a controlled  
decel to the motor voltage. This process  
allows for smooth pressure reduction  
and quiet check valve operation.  
Phase Loss  
The controller will trip off the line if one  
or more phases is lost.  
Class 70 / 71  
3-Phase Control Configuration  
Siemens-Furnas Class 70 / 71 combines  
Digital Signal Processor control and sili-  
con controlled rectifier (SCR) technolo-  
gies to provide optimum AC induction  
motor starting and operation. It provides  
soft start, energy savings,* soft stop,*  
and added protective features.  
The basic controller consists of electronic  
circuit boards linked via flat cable connec-  
tors. The main functions of the basic  
assembly are to monitor the operating  
parameters of the controller and to con-  
trol the firing sequence of the SCR’s.  
The power module located below the  
basic controller controls power to the  
motor. The incoming and motor load  
connections are made to terminal blocks  
located on the top and bottom of the  
power module.  
When SCR triggering is delayed, the volt-  
age to the load is reduced. This phase-  
controlled operation provides soft starting  
with stepless acceleration. Once the  
motor is running, voltage reduction can  
improve the motor’s operating point at  
partial load, saving energy and lowering  
the reactive current.  
The starters are available either as NEMA  
Type 1, 12, or 4 enclosures. Units are  
supplied with solid-state overload relays  
as complete starters, or as combination  
starters with fusible, non-fusible discon-  
nect, or thermal magnetic circuit breakers  
with or without shunt trip features.  
3RW2 Phase Control  
Additional options are also available.  
The Class 70 / 71 is designed to operate  
3 phase AC induction motors at 208 to  
575 volts and 6.1 to 960 amperes at 50  
or 60 Hertz.  
15  
ቢ
Available on 2000+ Starter  
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AC Controls  
Solid-State Reduced Voltage Starters  
Dimensions  
Table 15.36 Solid-State Reduced Voltage Starters  
Dimensions In Inches (mm)  
Current Rating Amps  
Class 70  
6.1–22  
Height  
NEMA 1, 12  
15 (381)  
Width  
Depth  
Height  
Width  
Depth  
14 (356)  
18 (457)  
23 (584)  
23 (584)  
36 (914)  
30 (762)  
10 (254)  
13 (330)  
10 (254)  
10 (254)  
11 (279)  
15 (381)  
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
—
42–55  
68–192  
248  
361–480  
720  
25 (635)  
36 (914)  
53 (1346)  
54 (1372)  
91 (2311)  
Class 71  
MCP or Thermal Mag  
NEMA 1  
NEMA 12  
6.1–22  
42–55  
68–105  
130  
26 (660)  
36 (914)  
16 (406)  
20 (508)  
20 (508)  
25 (635)  
22 (559)  
20 (508)  
30 (762)  
40 (1016)  
13 (330)  
11 (279)  
10 (254)  
10 (254)  
13 (330)  
15 (381)  
15 (381)  
15 (381)  
26 (660)  
36 (914)  
16 (406)  
20 (508)  
20 (508)  
20 (508)  
22 (559)  
30 (762)  
30 (762)  
50 (1270)  
13 (330)  
11 (279)  
10 (254)  
10 (254)  
13 (330)  
15 (381)  
15 (381)  
15 (381)  
46 (1168)  
53 (1346)  
76 (1930)  
90 (2286)  
90 (2286)  
90 (2286)  
46 (1168)  
46 (1168)  
76 (1930)  
90 (2286)  
90 (2286)  
90 (2286)  
192–248  
361  
480  
720  
Class 71  
Fusible Disconnect  
NEMA 1  
NEMA 12  
6.1–22  
42–55  
68–105  
130  
26 (660)  
36 (914)  
46 (1168)  
16 (406)  
20 (508)  
20 (508)  
25 (635)  
20 (508)  
30 (762)  
40 (1016)  
50 (1270)  
13 (330)  
11 (279)  
10 (254)  
10 (254)  
15 (381)  
15 (381)  
15 (381)  
15 (381)  
26 (660)  
36 (914)  
16 (406)  
20 (508)  
20 (508)  
25 (635)  
20 (508)  
30 (762)  
40 (1016)  
50 (1270)  
13 (330)  
11 (279)  
10 (254)  
10 (254)  
15 (381)  
15 (381)  
15 (381)  
15 (381)  
46 (1168)  
53 (1346)  
90 (2286)  
90 (2286)  
90 (2286)  
90 (2286)  
53 (1346)  
90 (2286)  
90 (2286)  
90 (2286)  
90 (2286)  
192–248  
361  
480  
720  
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AC Controls  
Pilot Device Units  
General  
Front Rings  
operation. The design is also well suited  
to low energy circuits common on pro-  
grammable controller interfaces. Blocks  
snap side by side on the holder and lock  
in place. The contact block holder is avail-  
able in 3 and 5 position versions, elimi-  
nating the need for piggyback contacts  
which are hard to wire and prone to fail-  
ure. Terminals meet the “touchsafe”  
requirements of IEC standards and are  
clearly marked.  
Wire funnels, screwdriver guides, and  
captive terminal screws make the con-  
tacts easy to wire while self lifting spring  
washers insure that the wire stays  
secure under severe vibration.  
Pilot Device Units and  
Both units are supplied as standard with  
metal chrome plated front rings. Black  
plastic or anodized aluminum rings are  
optional at no additional cost. The plastic  
rings are recommended for use where  
the atmosphere may be corrosive.  
Indicator Lights — Type 3SBO  
Pilot Device Options  
3SBO pilot devices are built by Siemens in  
two basic forms - 1) as assembled for the  
most frequently used configurations, or 2)  
as subassemblies for greater flexibility.  
LED Indicating Lights (Optional)  
Since LED’s consume less power, their  
life is 10 to 20 times that of conventional  
incandescent lamps. They also provide  
greater resistance to shock and vibration.  
Where lamp integrity and low mainte-  
nance is crucial, the 3SB0 LED indicator  
is recommended.  
Application  
3SB0 devices are heavy duty oiltight,  
watertight, and dusttight (NEMA Type 4,  
4X, 13, IP65). They are used in industrial  
control circuits at 600V or less. 3SBO  
pilot devices are available in two diame-  
ters, 7/8” and 1-13/64” (22 and 30 mm).  
7/8” (22 mm) Mounting  
Special contact blocks are available for  
solder connection to printed circuit  
boards. When used with the special  
operator adaptor, they present a unique  
solution to multiple button operator  
panels.  
Contact Blocks  
The operator is inserted into the hole in  
the panel from the front and twisted into  
the contact block holder. The unit is then  
fixed from behind by means of two set  
screws which are located in the contact  
block holder, preventing the unit from  
working loose or twisting.  
One line of contact blocks fits both size  
devices. All have parallel double break  
contacts with wiping action and reliability  
nibs to insure long, maintenance-free  
1-13/64” (30 mm) Mounting  
The holder is an integral part of the actu-  
ator, it is inserted into the hole in the  
panel from the rear and secured from the  
front by means of a front ring. With the  
use of a legend plate or the thrust and  
trim washers, the unit becomes station-  
ary and will not twist or work loose.  
Pushbutton Unit  
7/8” (22 mm) Mounting  
Pushbutton Unit  
1–13/64” (30 mm) Mounting  
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AC Controls  
Enclosed Pilot Device Stations  
General  
Application  
Contact Blocks  
Enclosed Pilot Device Stations  
P22 Series  
Contact blocks have double break bifur-  
cated silver contacts which improve  
contact fidelity. Contact blocks are heavy  
duty rated NEMA A600 and suitable  
for applications with low current draw.  
Molded bodies and pushers resist arcing  
and tracking. All units have stainless  
steel springs that resist corrosion and  
provide strong contact pressure. Captive  
mounting screws speed panel assembly.  
Class 52 oil tight pilot controls and acces-  
sories are designed to provide long, trou-  
ble free service in the most demanding  
industrial applications. These controls are  
oil and dust tight and meet NEMA 1, 3,  
4, 12, and 13 specifications.  
P22 stations are NEMA Type 1 metal  
enclosures and are available in 1, 2, 3,  
4, and 6 hole enclosures. Completely  
assembled stations are standard up  
to 3 hole units. Empty enclosures are  
available for 7/8” (22 mm) pilot devices,  
up to six units.  
Push Button Operators  
The operator base consists of a durable,  
one piece casting equipped with a heavy  
duty acrylic actuator with a stainless  
steel spring, a neoprene actuator sealing  
ring to prevent oil and dust from pene-  
trating to the contact blocks, a neoprene  
gasket to seal operator mounting hole,  
and a chrome plated lock nut.  
PBS1 Series  
Flush mounted NEMA Type 1B stainless  
steel plate are available with one and two  
device configurations.  
3SBO2 Series  
3SBO2 pushbutton stations use 7/8"  
(22 mm) pilot devices. Contact blocks are  
base mounted in the enclosure to permit  
easy wiring and service. The stations are  
available either assembled or unassem-  
bled. Special stations can be ordered  
complete from the factory. 3SBO2 pilot  
device stations are rated NEMA 1, 3R, 4,  
4X, 13, and IP65. Empty enclosures are  
available in molded plastic and cast alu-  
minum, and are supplied with conduit  
adapter, contact mounting plate, and  
sealing ring.  
PBS1 Series  
P22 Series NEMA 1  
P30 Series  
P30 pilot device stations use 1-13/64"  
(30 mm) pilot devices and are available in  
a number of configurations to meet most  
applications. The stations are available  
either assembled or unassembled. P30  
series stations are available in NEMA 1,  
3R, 4, 4X, and 13 enclosures.  
P30 Series NEMA 4X  
3SB02 Series  
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AC Controls  
Guide Form Specifications  
Specifications  
Interlock provisions shall prevent unau-  
NEMA standards. All operating parts  
can be removed quickly and easily from  
the front.  
3-Phase Manual Starters and  
1-Phase Starters  
thorized opening or closing of the starter  
door with the disconnect in the “on”  
position. Operating handle shall be suit-  
able for padlocking in the “off” position.  
All 3-Phase manual starters and single-  
phase starters rated above 1 HP shall be  
Siemens Class 11. They shall meet or  
exceed the requirements of NEMA, UL,  
and CSA. The starter must feature quick-  
make and quick-break contact operation  
and cannot be teased into open condition.  
It shall be provided with Class 20 melting  
alloy overload protection, have optional  
low voltage protection, padlock capability,  
and be available in open, NEMA 1, 3, 4, 7  
& 9, and 12 enclosures. Operating mech-  
anism must clearly show their position  
whether unit is on, off, or tripped.  
Devices shall have straight through  
wiring and conveniently located connec-  
tion points for external wires and cables  
minimize installation time. Combination  
starters shall be of either the fusible  
switch, non-fusible switch, or molded  
case circuit breaker type. Combination  
fusible starters shall contain fuse clips for  
Class L current limiting fuses rated  
200,000 amps symmetrical interrupting  
capacity, and shall have an externally  
operated load break disconnect switch.  
On the combination circuit breaker ver-  
sion, a molded case thermal magnetic  
circuit breaker which has an adjustable  
magnetic trip provision, shall be provided.  
Reversing starters will contain two con-  
tactors that are electrically and mechani-  
cally interlocked in addition to all the  
above described features. 3-phase, 250 to  
900 HP non-reversing and reversing  
50 / 60 Hz. NEMA size 6 through 8 full-  
voltage starters are used for across-the-  
line starting of squirrel cage induction  
motors and the primary control functions  
for wound rotor motors. In addition they  
can be used for control of power for  
static or resistive loads such as lighting  
and heating. They provide the lowest  
cost, least maintenance and minimum  
space requirements of any magnetic  
starters where inrush current limitations  
do not restrict their use.  
Type SXL and SRL  
Non-Reversing or Reversing  
Starters  
Across-the-line magnetic starters for  
motors up to 200 HP, 600 volts, shall be  
Siemens Class 14 starters or equal. They  
shall be built and tested in accordance  
with the latest NEMA Standard ICS2-321  
and UL Listed.  
Starters shall be equipped with three-  
pole, double-break contactors 45° wedge  
action cross arm design utilized to mini-  
mize arcing contact bounce. Half-sized  
for specific HP ratings between NEMA  
sizes should be available for space and  
cost savings. Coils should snap in and  
out for ease of inspection and changing.  
Dual voltage coils shall be optional.  
Combination Starters,  
NEMA Size 0–5  
Across-the-line non-reversing or reversing  
combination starters for motors up to  
200 HP, 460 volts shall be Type SCB  
(motor circuit interrupter Type ETI), Type  
SCF (fusible disconnect switch Type  
MCS), or Type SCN (non-fusible discon-  
nect switch, Type MCS). They shall be  
built in accordance with the latest NEMA  
IC52 standards and shall be UL Listed.  
The Type SCB and SCF shall be UL  
Listed for applications requiring up to  
100,000 amps withstand ratings without  
the addition of current limiters. Class  
“R”fuse clips to be supplied as standard.  
Starters shall be equipped with three  
pole double break contactor with arc  
quenching system consisting of arc  
chutes with arc splitter plates and a  
maximum contact bounce time of 2 milli-  
seconds for extended contact life. The  
contactor shall have a minimum locked  
rotor rating of 840% FLA for 10 seconds  
duration. Starter shall include a minimum  
of two normally open and two normally  
closed contacts as standard (one open  
and one closed on reversers).  
Starters shall be equipped with three-pole  
overload relays. Overload relay shall be  
block-type NEMA Class 20 with a test fea-  
ture. An isolated field mountable alarm  
contact should be available. An optional  
Class 10 overload relay should also be  
available for factory or field installation.  
Starter shall include one normally open  
auxiliary contact as standard with capabil-  
ity of mounting at least 3 additional.  
Starters shall be equipped with three-  
pole overload relays. Overload relay shall  
be melting alloy-type NEMA Class 20  
with a test feature. An isolated field  
mountable alarm contact should be avail-  
able. Optional Class 10 overload relay  
should also be available for factory or  
field installation.  
Full Voltage Starters,  
NEMA Size 6–8  
Across-the-line reversing and non-  
Starter Types  
Non-Reversing  
Class 18 Motor Circuit Interrupter (ETI)  
Class 17 Fusible Switch (MCS)  
Class 17 Non-Fusible Switch (MCS)  
Reversing  
Class 26 Motor Circuit Interrupter (ETI)  
reversing starters for motors rated above  
100 HP at 230 volts, and above 200 HP  
at 460 volts. Starters shall be equipped  
with three-pole double-break contactors  
with an arc quenching system consisting  
of arc chutes with arc splitter plates and  
a limited contact bounce to extended  
contact life. Starter shall include a control  
transformer as standard. Starter shall also  
include a solid state microprocessor con-  
trolled overload relay with three current  
transformers and shall have an adjustable  
tripping class from Class 10 to Class 30  
to compensate for long acceleration  
times. The overload relay shall offer pro-  
tection from overloads, phase loss, and  
phase unbalance, and also include an iso-  
lated alarm circuit contact and test but-  
ton. The starters shall be built and tested  
in accordance with the latest NEMA  
standard ICS 2-321 and UL Listed.  
Class 25 Fusible Switch (MCS)  
Class 27 Non-Fusible Switch (MCS)  
Additional Starter Sizes  
Oversize enclosures are available:  
Class 17 and 18, NEMA sizes 0–4.  
The combination starter operating handle  
shall always remain connected to the  
breaker or switch. The operating handle  
shall not be mounted in the door of the  
enclosure, but to the side of the door in  
the enclosure flange for safe “stand  
aside” operation. Position of operating  
handle will indicate “on, off, or tripped”  
condition of switch or circuit breaker.  
15  
All starter enclosure types are fabricated  
types, in accordance with the latest  
Siemens Electrical Products and Systems  
Specification Guide  
CSI Section 16160  
311  
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AC Controls  
Guide Form Specifications  
Specifications  
relay shall be a 3UB solid state micro-  
feature, phase unbalance and phase loss  
protection, be field adjustable, and have an  
isolated alarm circuit contact. For NEMA  
size 6–8 starters, the overload relay shall  
be a 3UB solid state microprocessor con-  
trolled device and have a field adjustable  
class setting from Class 10 through Class  
30 to compensate for long accelerating  
times. The starters shall be built and test-  
ed in accordance with the latest NEMA  
Standard ICS 2-321 and UL Listed.  
Reduced Voltage  
processor-controlled device and have a  
field adjustable class setting from Class  
10 through Class 30 to compensate for  
long accelerating times. The starters shall  
be built and tested in accordance with the  
latest NEMA standard ICS 2-321 and UL  
Listed.  
Autotransformer Starters  
Reduced voltage starters shall be  
Siemens Type SAT for motors up to 900  
HP, 600V. Starter shall be the closed tran-  
sition type providing field adjustable volt-  
age taps for 50, 65, and 80% of the line  
voltage. The autotransformer shall be a  
NEMA medium duty with internal thermal  
protectors for protection of overheating  
due to excessive repeat starts that  
exceed the allowable number of starts on  
the transformer. Incomplete sequence  
protection is to be provided on all NEMA  
size 6–8 starters.  
Reduced Voltage Wye  
Delta Starters  
Wye Delta Open And Closed  
Transition Starters  
Solid State Reduced Voltage Starters  
Voltage Limit: To set a soft start, no  
need to know full load amps regardless  
of motor size (it limits inrush current dur-  
ing the starting period). It reduces peak  
torques at near synchronous speed com-  
pared to current limit start.  
Impulse Start: Provides breakaway  
torque for high friction loads such as  
crushers or mixers, it reduces motor  
heating compared to ramp starts.  
Shunt Trip: For positive isolation on fault  
conditions; in case of 2 shorted SCR’S.  
Emergency Start: With a shorted SCR,  
controller should be able to soft start and  
run to save the process.  
Under / Over Voltage: Under over volt-  
age protection prevents motor and con-  
troller damage.  
UL Ratings: UL Listed and short circuit  
tested for 65 kA or higher with circuit  
breakers (magnetic trip only breakers).  
Short circuit tested for 100 kA with RK5  
fuses.  
Diagnostics: On board fault diagnostics  
with selectable fault relay output.  
Initialization Check: 50-millisecond  
check on start; for short circuit, power  
line conditions, and load connections.  
Re-Start of Rotating Motors (Start on  
the Fly): Starting motors with applied  
BEMF (back electro magnetic force) with  
no transients. No need to wait for field  
to collapse or decay. Smooth reversing.  
Power Outage: Ride-through power out-  
ages for 0.5 seconds on control power  
up to 5 seconds on primary power.  
SCR Thermal Protection: Temperature  
and current predicting model to protect  
SCR’s for all conditions by keeping semi-  
conductors below the rated junction  
temperature.  
Fully Isolated Electronics: All inputs,  
relays and DC power components must  
be isolated from customer connections  
to provide noise immunity, 2500 volt di-  
electric with start.  
Inputs: All inputs must operate on 120  
volts including remote reset input.  
Communications: Communications port  
must be provided on the electronics to  
interface with IBM compatible PC via  
RS232 link.  
Wye delta starters shall be equipped with  
three-pole double-break contactors with  
an arc quenching system consisting of arc  
chutes with arc splitter plates and a maxi-  
mum 2-millisecond bounce time on sizes  
2–5 to extend contact life. Starter shall  
include three 3-pole contactors sized per  
NEMA standard ICS-2-321-7 and appropri-  
ate mechanical interlock.  
A transition timer shall be provided which  
can be field adjusted to set the starting  
time. A fourth contactor will be used on  
closed transition starters with transition  
resistors wired in each phase. An incom-  
plete sequence relay shall be included to  
protect the transition resistors in the  
event the transition is not completed.  
Wye delta starters shall be equipped with  
a three-pole overload relay wired in the  
phase windings.  
Autotransformer starters shall be  
equipped with three-pole double-break  
contactors with an arc quenching system  
consisting of arc chutes with arc splitter  
plates and a maximum 2 millisecond  
bounce time on sizes 2–5 to extend con-  
tact life. Run contactor shall be capable of  
carrying a minimum of 840% full-load cur-  
rent for 10 seconds duration on sizes 2–5.  
Starter shall include two three-pole con-  
tactors, to connect the autotransformer  
for reduced voltage starting, and a two-  
pole (run) contactor to bypass the auto-  
transformer and connect the motor for  
full voltage across-the-line running after  
a predetermined starting time is reached.  
A transition timer shall be provided which  
can be field adjusted to set the starting  
time. Starters shall be equipped with  
three-pole overload relays. Overload relay  
shall be a block type NEMA Class 10 with  
push to test feature, phase unbalance and  
phase loss protection, be field adjustable,  
and have an isolated alarm circuit contact.  
For NEMA Size 6–8 starters, the overload  
relay shall be a 3UB solid state micro-  
processor controlled device and have a  
field adjustable class setting from Class  
10 through Class 30 to compensate for  
long accelerating times.  
Overload relay shall be a block type  
NEMA Class 10 with push to test feature,  
phase unbalance and phase loss protec-  
tion, be field adjustable, and have an iso-  
lated alarm circuit contact. For NEMA size  
6–8 starters, the overload relay shall be a  
3UB solid state microprocessor controlled  
device and have a field adjustable class  
setting from Class 10 through Class 30 to  
compensate for long accelerating times.  
The starters shall be built and tested in  
accordance with the latest NEMA  
The starters shall be built and tested in  
accordance with the latest NEMA  
standard ICS 2-321 and UL Listed.  
Standard ICS 2-321 and UL Listed.  
Reduced Voltage, Part  
Winding Starters  
Part Winding Starters  
Multi-Speed Starters  
Type S1, S2 multi-speed starters shall be  
equipped with three-pole, double-break  
contactors with an arc quenching system  
consisting of arc chutes with arc splitter  
plates, and a maximum 2-millisecond  
bounce time on sizes 2–5 to extend  
contact life.  
Part winding starters shall be equipped  
with three pole double break contactors  
with an arc quenching system consisting  
of arc chutes with arc splitter plates and a  
maximum 2-millisecond bounce time on  
sizes 2–5 to extend contact life. Starter  
shall include two three-pole contactors  
mechanically interlocked. A transition timer  
shall be provided which can be field adjust-  
ed to set the starting time. Starters shall  
be equipped with three-pole overload  
relays. Overload relays shall be a block  
type NEMA Class 10 with push-to-test  
15  
Starters shall be equipped with three-pole  
overload relays. Overload relay shall be a  
block type NEMA Class 10 with push-to-  
test feature, phase unbalance and phase  
loss protection, be field adjustable, and  
have an isolated alarm circuit contact. For  
NEMA Size 6–8 starters, the overload  
Siemens Electrical Products and Systems  
Specification Guide  
312  
CSI Section 16160  
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