Brochure

© 1998 Square D All Rights Reserved
46
5/98
Class 881 and 8812 line voltage starters are designed to control 3 and 4 speed motors, respectively.
The use of an automatic starter and proper control station permits greater efficiency. The addition of
compelling relays to a starter gives protection to both the motor and the machine against an improper
sequence or a too rapid change in speed. The motor is protected against excessive operating currents
by overload relay blocks (one for each motor speed) each of which accepts three (3) thermal units. While
the starters listed are for use with consequent pole motors only, separate winding motor starters are
also available upon request.
Thermal Units
Thermal units should be ordered separately. For selection of thermal units, refer to the Catalog Thermal
Unit Selection Index R Digest. All starters require the use of three (3) thermal units for each speed of
the motor. Do not use the horsepower rating(s) for selection. Use nameplate FLC’s (Full Load Currents)
from motor nameplate.
Class 8811 — Three Speed AC Magnetic Starters — Consequent Pole, 2 Winding
600 Volts Maximum — 50-60 Hertz
Type of
Motor
NEMA
Size
Maximum Horsepower
General Purpose
Enclosure
NEMA Type 1
Watertight and
Dusttight Enclosure
(Stainless Steel)
NEMA Type 4
Dusttight and Driptight
Industrial Use Enclosure
NEMA Type 12
(Type 3 and 3R)j
Open
Type
200 V 230 V 460-575 V Type Type Type Type
Constant
Horsepower
0 2 2 3 SBG-1 SBW-1 SBA-1 SBO-1
1 557
1
⁄
2
SCG-1 SCW-1 SCA-1 SCO-1
27
1
⁄
2
10 20 SDG-1 SDW-1 SDA-1 SDO-1
3 20 25 40 SEG-1 SEW-1 SEA-1 SEO-1
4 30 40 75 SFG-1 SFW-1 SFA-1 SFO-1
Constant
Torque
0 3 3 5 SBG-2 SBW-2 SBA-2 SBO-2
17
1
⁄
2
7
1
⁄
2
10 SCG-2 SCW-2 SCA-2 SCO-2
2 10 15 25 SDG-2 SDW-2 SDA-2 SDO-2
3 25 30 50 SEG-2 SEW-2 SEA-2 SEO-2
4 40 50 100 SFG-2 SFW-2 SFA-2 SFO-2
Variable
Torque
0 3 3 5 SBG-3 SBW-3 SBA-3 SBO-3
17
1
⁄
2
7
1
⁄
2
10 SCG-3 SCW-3 SCA-3 SCO-3
2 10 15 25 SDG-3 SDW-3 SDA-3 SDO-3
3 25 30 50 SEG-3 SEW-3 SEA-3 SEO-3
4 40 50 100 SFG-3 SFW-3 SFA-3 SFO-3
Class 8812 — Four Speed AC Magnetic Starters — Consequent Pole, 2 Winding
600 Volts Maximum — 50-60 Hertz
Type of
Motor
NEMA
Size
Maximum Horsepower
General Purpose
Enclosure
NEMA Type 1
Watertight and
Dusttight Enclosure
(Stainless Steel)
NEMA Type 4
Dusttight and Driptight
Industrial Use Enclosure
NEMA Type 12
(Type 3 and 3R)j
Open
Type
200 V 230 V 460-575 V Type Type Type Type
Constant
Horsepower
0 2 2 3 SBG-1 SBW-1 SBA-1 SBO-1
1 557
1
⁄
2
SCG-1 SCW-1 SCA-1 SCO-1
27
1
⁄
2
10 20 SDG-1 SDW-1 SDA-1 SDO-1
3 20 25 40 SEG-1 SEW-1 SEA-1 SEO-1
4 30 40 75 SFG-1 SFW-1 SFA-1 SFO-1
Constant
Torque
0 3 3 5 SBG-2 SBW-2 SBA-2 SBO-2
17
1
⁄
2
7
1
⁄
2
10 SCG-2 SCW-2 SCA-2 SCO-2
2 10 15 25 SDG-2 SDW-2 SDA-2 SDO-2
3 25 30 50 SEG-2 SEW-2 SEA-2 SEO-2
4 40 50 100 SFG-2 SFW-2 SFA-2 SFO-2
Variable
Torque
0 3 3 5 SBG-3 SBW-3 SBA-3 SBO-3
17
1
⁄
2
7
1
⁄
2
10 SCG-3 SCW-3 SCA-3 SCO-3
2 10 15 25 SDG-3 SDW-3 SDA-3 SDO-3
3 25 30 50 SEG-3 SEW-3 SEA-3 SEO-3
4 40 50 100 SFG-3 SFW-3 SFA-3 SFO-3
j NEMA Type 12 enclosures may be field modified for outdoor applications.
How to Order:
To Order Specify: Catalog Number
• Class Number
• Type Number
• Coil Voltage Code
• Form(s)
Class Type Coil
Voltage
Code
Form(s)
8810 SCO8 VO6 P1S
Three and Four Speed AC Magnetic Starters
Line Voltage — with Melting Alloy Overload Relays – Class 8811, 8812
File LR60905
Class 3211-04
File E78351
CCN NLDX