Square D Reduced Voltage Starters - Class 8547, 8549, 8604, 8606, 8630, 8640, 8650, 8651
  Square D Motor Starters Motor Starters
 

Southland Electrical Supply stocks a wide variety of Square D's Reduced Voltage Starter Class 8547 product line.

Because Squirrel cage motors draw high starting currents and produce high starting torques when started at a high voltage, Square D reduced voltage starters are needed. The Square D reduced voltage starters provide means of reducing current and torque.

square d class 8536 motor starter nema size 1 8536sc0vo2

Use the links below to jump to product descriptions and part numbers:

Reduced Voltage Starters - Primary Resistor Type - Class 8547, 8549

The Class 8547 (reversing) and 8549 (non-reversing) primary resistor starters are used when squirrel cage motors need starting with low current to avoid power line disturbances, or low torque to prevent equipment  damage.

  Maximum Horsepower Volts NEMA Size Thermal units Required NEMA Type 1 NEMA Type 12  
2 Pole Single Phase 2 115-230 1 1 SCG-1 SCA-1  
3 115
230
1P
1
1
1
SCG-2
SCG-1
SCA-2
SCA-1
 
5 230 1P 1 SCG-2 SCA-2  
7 1/2 230 2 1 SDG-1 SDA-1  
10 230 3 1 SEG-1 SEA-1  
15 230 3 1 SEG-1 SEA-1  
3 Pole
Three Phase
5 200-230
380-575
1 3 SCG-3 SCA-3 SCG-1
  7 1/2 200-230
380-575
1 3 SCG-3 SCA-3 SCG1
  10 200-230
380-575
2
1
3 SDG-2
SCG-3
SDA-2
SCA-3
SDG-1
SCG-1
  15 200
230
380-575
3
2
2
3 SEG-2
SDG-2
SDG-2
SEA-2
SDA-2
SDA-2
SEG-1
SDG-1
SDG-1
  20 200-230
380-575
3
2
3 SEG-2
SDG-2
SEA-2
SDA-2
SEG-1
SDG-1
  25 200-230
380-575
3
2
3 SEG-2
SDG-2
SEA-2
SDA-2
SEG-1
SDG-1
  30 200
230
380-575
4
3
3
3 SFG-1
SEG-2
SEG-2
SFA-1
SEA-2
SEA-2
SFG-1
SEG-1
SEG-1
  40 200-230
380-575
4
3
3 SFG-1
SEG-2
SFA-1
SEA-2
SFG-1
SEG-1
  50 200
230
380-575
5
4
3
3 SGG-1
SFG-1
SEG-2
SGA-1
SFA-1
SEA-2
SGG-1
SFG-1
SEG-1
  75 200-230
380-575
5
4
3 SGG-1
SFG-1
SGA-1
SFA-1
SGG-1
SFG-1
  100 200
230
380
460-575
6
5
5
4
3 SHG-1
SGG-1
SGG-1
SFG-1
SHA-1
SGA-1
SGA-1
SFA-1
.....
SGG-1
SGG-1
SFG-1
  125 200-230
380-575
6
5
3 SHG-1
SGG-1
SHA-1
SGA-1
.....
SGG-1
  150 200-230
380-575
6
5
3 SHG-1
SGG-1
SHA-1
SGA-1
.....
SGG-1
  200 230
380
460-575
6
6
5
3 SHG-1
SHG-1
SGG-1
SHA-1
SHA-1
SGA-1
.....
.....
SGG-1
  250 230
380-575
7
6
3 SJG-1
SHG-1
SJA-1
SHG-1
 
  300 230
380-575
7
6
3 KG-1
SHG-1
KA-1
SHA-1
 
  400 230
460-575
8
6
3 KG-1
SHG-1
KA-1
SHA-1
 
  450 230
460-575
8
7
3 KG-1
SJG-1
KA-1
SJA-1
 
  500 460-575 7 3 SJG-1 SJA-1  
  600 460-575 7 3 SJG-1 SJA-1  
  700 460-575 8 3 KG-1 KA-1  
  800 460-575 8 3 KG-1 KA-1  
  900 460-575 8 3 KG-1 KA-1  

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Reduced Voltage Starters - Multi-Point Primary Resistor Type - Class 8547

Multi-Point starters are used when power companies specify a maximum value of current that can be drawn from the power line when starting a motor. The Square D Class 8547 Multi-Point Primary Resistor starters provide equal current increments.

50-60 Hertz 3 Pole                                                       200-275 Volts
Max. Horsepower Volts Final Contactor NEMA Size 2 Point Acceleration 3 Point Acceleration 4 Point Acceleration 5 Point Acceleration 6 Point Acceleration
10 200-230
380-575
2
1
SCG-5
SCG-7
SDG-8
SDG-8
     
15 200
230
380-575
3
2
2
SEG-8
SDG-5
SDG-5
SEG-9
SDG-6
SDG-6
     
20 200-230
380-575
3
2
SEG-8
SDG-5
SEG-9
SDG-6
SEG-10
.....
   
25 200-230
380-575
3
2
SEG-8
SDG-5
SEG-9
SDG-6
SEG-10
.....
   
30 200
230
380-575
4
3
3
SFG-3
SEG-8
SEG-8
SEG-9
SDG-6
SEG-5
SEG-10
SEG-10
SFG-6
.....
.....
 
40 200-230
380-575
4
3
SFG-3
SEG-8
SFG-4
SEG-9
SFG-5
SEG-10
SFG-6
SFG-6
 
50 200
230
380-575
5
4
3
SGG-4
SFG-3
SEG-8
SGG-5
SFG-4
SEG-9
SGG-7
SFG-5
SEG-10
SGG-9
SFG-6
.....
SGG-11
.....
.....
60 200-230
380-575
5
4
SGG-4
SFG-3
SGG-5
SFG-4
SGG-7
SFG-5
SGG-9
SFG-6
SGG-11
SGG-6
75 200-230
380-575
5
4
SGG-4
SFG-3
SGG-6
SGG-6
SFG-4
SGG-7
SFG-5
SGG-9
SFG-6
SGG-12
.....
100 230
380
460-575
5
5
4
SGG-4
SGG-4
SFG-3
SGG-5 SGG-8
SGG-8
SFG-5
SGG-10
SGG-10
SFG-6
SGG-13
SGG-13
.....
125 380-575 5 SGG-4 SGG-5 SGG-7 SGG-9 SGG-11
150 380-575 5 SGG-4 SGG-5 SGG-7 SGG-9 SGG-12
200 460-575 5 SGG-4 SGG-6 SGG-8 SGG-10 SGG-13

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Reduced Voltage Starters - Vari-Torq Adjustable Reactor Type - Class 8604

Square D Class 8604 reactor type starters are similar to the Class 8547 primary resistor starters, except for adjustable reactors replace the resistors. Please call for part numbers and applications.

Reduced Voltage Starters - Autotransformer Type - Class 8606

Starters are provided with taps to select 50%, 65%, or 80% voltage to the motor while starting. The taps permit adjustment to select the proper voltage for the right amount of torque.

50-60Hz Three Melting Allow Thermal Relays                              600 Volts Max.
Max HP Ratings Volts NEMA Size NEMA Type 1 NEMA Type 4 NEMA Type 9 NEMA Type 12 Open Type
10 200-230
380-575
2 SDG-1 SDW-1 SDE-1 SDA-1 SDO-1
15 200
230
380-575
3
2
2
SEG-1
SDG-1
SDG-1
SEW-1
SDW-1
SDW-1
SEE-1
SDE-1
SDE-1
SEA-1
SDA-1
SDA-1
SE0-1
SD0-1
SD0-1
25 200-230
380-575
3
2
SEG-1
SDG-1
SEW-1
SDW-1
SEE-1
SDE-1
SEA-1
SDA-1
SEO-1
SDO-1
30 200
230
380-575
4
3
3
SFG-1
SEG-1
SEG-1
SFW-1
SEW-1
SEW-1
SEE-1
SEE-1
SEE-1
SFA-1
SEA-1
SEA-1
SFO-1
SEO-1
SEO-1
40 200-230
380-575
4
3
SFG-1
SEG-1
SFW-1
SEW-1
SFE-1
SEE-1
SFA-1
SEA-1
SFO-1
SEO-1
50 200
230
380-575
5
4
3
SGG-1
SFG-1
SEG-1
SGW-1
SFW-1
SEW-1
.....
SFE-1
SEE-1
SGA-1
SFA-1
SEA-1
SGO-1
SFO-1
SEO-1
75 200-230
380-575
5
4
SGG-1
SFG-1
SGW-1
SFW-1
.....
SFE-1
SGA-1
SFA-1
SGO-1
SFO-1
100 200
230
380
460-575
6
5
5
4
SHG-1
SGG-1
SGG-1
SFG-1
SHW-1
SGW-1
SGW-1
SFW-1
.....
.....
.....
SFE-1
SHA-1
SGA-1
SGA-1
SFA-1
SHO-1
SGO-1
SGO-1
SFO-1
125 200
230
380-575
6
6
5
SHG-1
SHG-1
SGG-1
SHW-1
SHW-1
SGW-1
  SHA-1
SHA-1
SGA-1
SHO-1
SHO-1
SGO-1
150 200
230
380-575
6
6
5
SHG-1
SHG-1
SGG-1
SHW-1
SHW-1
SGW-1
  SHA-1
SHA-1
SGA-1
SHO-1
SHO-1
SGO-1
200 230
380
460-575
6
6
5
SHG-1
SHG-1
SGG-1
SHW-1
SHW-1
SGW-1
  SHA-1
SHA-1
SGA-1
SHO-1
SHO-1
SGO-1
250 203
380-575
7
6
SJG-1
SHG-1
SJG-1
SHG-1
  SJA-1
SHA-1
.....
SHO-1
300 230
380-575
7
6
SJG-1
SHG-1
SJW-1
SHW-1
  SJA-1
SHA-1
.....
SHO-1
400 230
460-575
8
6
KG-1
SHG-1
KW-1
SHW-1
  KA-1
SHW-1
.....
SHO-1
450 230
460-575
8
7
KG-1
SHG-1
KW-1
SHW-1
  KA-1
SHA-1
 
500 460-575 7 SJG-1 SJW-1   SJA-1  
600 460-575 7 SJG-1 SJW-1   SJA-1  
700 460-575 8 KG-1 KW-1   KA-1  
800 460-575 8 KG-1 KW-1   KA-1  
900 460-575 8 KG-1 KW-1   KA1  

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Reduced Voltage Starters - Wye Delta Type - Class 8630

The Square D Class 8630 Wye-Delta starters may only be used with 6 lead (Wye Delta) motors. The starters connect to the motor windings in Wye for starting, then in delta for running. The Class 8360 starter utilizes three melting allow overload relays.

600 Volts Max Three Melting Alloy Overload Relays 50-60 Hertz
  Open Transition Starting Closed Transition Starting
Max HP Voltage NEMA Size NEMA Type 1 NEMA Type 4 NEMA Type 12 Open Type NEMA Type 1 NEMA Type 4 NEMA Type 12 Open Type
10 200-230
380-575
1YD
1YD
SCG-1
SCG-1
SCW-11
SCW-11
SCA-1
SCA-1
SCO-1
SCO-1
SCG-2
SCG-2
SCW-12
SCW-12
SCA-2
SCA-2
SCO-2
SCO-2
15 200-230
380-575
2YD
1YD
SDG-1
SCG-1
SDW-11
SCW-11
SDA-1
SCA-1
SDO-1
SCO-1
SDG-2
SCG-2
SDW-12
SCW-12
SDA-2
SCA-2
SDO-2
SCO-2
20 200-230
380-575
2YD
2YD
SDG-1
SDG-1
SDW-11
SDW-11
SDA-1
SDA-1
SDO-1
SDO-1
SDG-2
SDG-2
SDW-12
SDW-12
SDA-2
SDA-2
SDO-2
SDO-2
25 200
230
380-575
3YD
2YD
2YD
SEG-1
SDG-1
SDG-1
SEW-11
SDW-11
SDW-11
SEA-1
SDA-1
SDA-1
SEO-1
SDO-1
SDO-1
SEG-2
SDG-2
SDG-2
SEW-12
SDW-12
SDW-12
SEA-2
SDA-2
SDA-2
SEO-2
SDO-2
SDO-2
30 200-230
380-575
3YD
2YD
SEG-1
SDG-1
SEW-11
SDW-11
SEA-1
SDA-1
SEO-1
SDO-1
SEG-2
SDG-2
SEW-12
SDW-12
SEA-2
SDA-2
SEO-2
SDO-2
40 200-230
380-575
3YD
2YD
SEG-1
SDG-1
SEW-11
SDW-11
SEA-1
SDA-1
SEO-1
SDO-1
SEG-2
SDG-2
SEW-12
SDW-12
SEA-2
SDA-2
SEO-2
SDO-2
50 200
230
380-575
4YD
3YD
3YD
SFG-1
SEG-1
SEG-1
SFW-11
SEW-11
SEW-11
SFA-1
SEA-1
SEA-1
SFO-1
SEO-1
SEO-1
SFG-2
SEG-2
SEG-2
SFW-12
SEW-12
SEW-12
SFA-2
SEA-2
SEA-2
SFO-2
SEO-2
SEO-2
60 200-230
380-575
4YD
3YD
SFG-1
SEG-1
SFW-11
SEW-11
SFA-1
SEW-1
SFO-1
SEO-1
SFG-2
SEG-2
SFW-12
SFW-12
SFA-2
SFA-2
SFO-2
SFO-2
75 200
230
380-575
5YD
4YD
3YD
SGG-1
SFG-1
SEG-1
SGW-1
SFW-11
SEW-11
SGA-1
SFA-1
SEA-1
SGO-1
SFO-1
SEO-1
SGG-2
SFG-2
SEG-2
SGW-2
SFW-12
SEW-12
SGA-2
SFA-2
SEA-2
SGO-2
SFO-2
SEO-2
100 200-230
380-575
5YD
4YD
SGG-1
SFG-1
SGW-1
SFW-11
SGA-1
SFA-1
SGO-1
SFO-1
SGG-2
SFG-2
SGW-2
SFW-12
SGA-2
SFA-2
SGO-2
SFO-2
150 200-230
380-575
5YD
4YD
SGG-1
SFG-1
SGW-1
SFW-11
SGA-1
SFA-1
SGO-1
SFO-1
SGG-2
SFG-2
SGW-2
SFW-12
SGA-2
SFA-2
SGO-2
SFO-2
250 200-230
380-575
6YD
5YD
SHG-1
SGG-1
SHW-1
SGW-1
SHA-1
SGA-1
SHO-1
SGO-1
SHG-2
SGG-2
SHW-2
SGW-2
SHA-2
SGA-2
SHO-2
SGO-2
300 200-230
380
460-575
6YD
6YD
5YD
SHG-1
SHG-1
SGG-1
SHW-1
SHW-1
SGG-1
SHA-1
SHA-1
SGA-1
SHO-1
SHO-1
SGO-1
SHG-2
SHG-2
SGG-2
SHW-2
SHW-2
SGW-2
SHA-2
SHA-2
SGA-2
SHO-2
SHO-2
SGO-2
350 200
380
380-575
7YD
6YD
6YD
SJG-1
SHG-1
SHG-1
SJW-1
SHW-1
SHW-1
SJA-1
SHA-1
SHA-1
SJO-1
SHO-1
SHO-1
SJG-2
SHG-2
SHG-2
SJW-2
SHW-2
SHW-2
SJA-2
SHA-2
SHA-2
SJO-2
SHO-2
SHO-2
500 200-230
380-575
7YD
6YD
SJG-1
SHG-1
SJW-1
SHW11
SJA-1
SHA-1
SJO-1
SHO-1
SJG-2
SHG-2
SJW-2
SHW-2
SJA-2
SHA-2
SJO-2
SHO-2
600 200-230
380
460-575
8YD
7YD
6YD
KG-1
SJG-1
SHG-1
KW-1
SJW-1
SHW-1
KA-1
SJA-1
SHA-1
KO-1
SJO-1
SHO-1
KG-3
SJG-2
SHG-2
KW-2
SJW-2
SHW-2
KA-2
SJA-2
SHA-2
KO-2
SJO-2
SHO-2
700 200-230
380
460-575
8YD
7YD
6YD
KG-1
SJG-1
SHG-1
KW-1
SJW-1
SHW-1
KA-1
SJA-1
SHA-1
KO-1
SJO-1
SHO-1
KG-2
SJG-2
SHG-2
KW-2
SJW-2
SHW-2
KA-2
SJA-2
SHA-2
KO-2
SJO-2
SHO-2
750 200-230
380-575
8YD
7YD
KG-1
SJG-1
KW-1
SJW-1
KA-1
SJA-1
KO-1
SJO-1
KG-2
SJG-2
KW-2
SJW-2
KA-2
SJA-2
KO-2
SJO-2
800 230
380-575
8YD
7YD
KG-1
SJG-1
KW-1
SJW-1
KA-1
SJA-1
KO-1
SJO-1
KG-2
SJG-2
KW-2
SJW-2
KA-2
SJA-2
KO-2
SJO-2
1000 380
460-575
8YD
7YD
KG-1
SHG-1
KW-1
SHW-1
KA-1
SHA-1
KO-1
SHO-1
KG-2
SHG-2
KW-2
SHW-2
KA-2
SHA-2
KO-2
SHO-2
1500 460-575 8YD KG-1 KW-1 KA-1 KO-1 KG-2 SW-2 KA-2 KO-2

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Reduced Voltage Starters - Part Winding Class 8640

The Square D Part winding starters are used to start motors with two sets of windings and can be started with only one. After starting the second winding is connected. There are hand reset melting thermal units for each winding.

Six Melting Alloy Overload Relays                                  600V Max
Motor Voltage Max HP Poly Phase NEMA Size NEMA Type 1 NEMA Type 4 NEMA Type 9 NEMA Type 12 Open Type
200 10
20
40
75
150
1PW
2PW
3PW
4PW
5PW
SCG-1
SDG-1
SEG-1
SFG-1
SGG-1
SCW-11
SDW-11
SEW-11
SFW-11
SGW-11
SCE-1
SDE-1
SEE-1
SFE-1
.....
SCA-1
SDA-1
SEA-1
SFA-1
SGA-1
SCO-1
SDO-1
SEO-1
SFO-1
SGO-1
230 10
25
50
75
150
300
450
1PW
2PW
3PW
4PW
5PW
6PW
7PW
SCG-1
SDG-1
SEG-1
SFG-1
SGG-1
SGH-1
SJG-1
SCW-11
SDW-11
SEW-11
SFW-11
SGW-11
SHW-11
SJW-11
SCE-1
SDE-1
SEE-1
SFE-1
.....
.....
SCA-1
SDA-1
SEA-1
SFA-1
SGA-1
SHA-1
SJA-1
SCO-1
SDO-1
SEO-1
SFO-1
SGO-1
SHO-1
SJO-1
460-575 15
40
75
750
350
600
900
1PW
2PW
3PW
4PW
5PW
6PW
7PW
SCG-1
SDG-1
SEG-1
SFG-1
SGG-1
SHG-1
SJG-1
SCW-11
SDW-11
SEW-11
SFW-11
SGW-11
SHW-11
SJW-11
SCE-1
SDE-1
SEE-1
SFE-1
.....
.....
.....
SCA-1
SDA-1
SEA-1
SFA-1
SGA-1
SHA-1
SJA-1
SCO-1
SDO-1
SEO-1
SFO-1
SGO-1
SHO-1
SJO-1

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Reduced Voltage Starters - Wound Rotor Type - Class 8650, 8651

Wound rotor or slip ring motors can be started with the Square D Class 8560 and 8651 non-reversing, and reversing starters. Starters have three hand reset melting overload relays.

HP Rating

NEMA Size of Primary Contactor Volts Acceleration Points NEMA Type 1 NEMA Type 12
3 1 200-230
380-575
2 SCG-1 SCA-1
5 1 200-230
380-575
2 SCG-1 SCA-1
7 1/2 1 200-230
380-575
2 SCG-1 SCA-1
10 2
1
200-230
380-575
2 SDG-1
SCG-1
SDA-1
SCA-1
15 3
2
2
200
230
380-575
2 SEG-2
SDG-1
SDG-1
SEA-2
SDA-2
SDA-2
20 3
2
200-230
380-575
3 SEG-1
SDG-2
SEA-1
SDA-2
25 3
2
200-230
380-575
3 SEG-1
SDG-1
SEA-1
SDA-1
30 4
3
3
200
230
380-575
3 SFG-1
SEG-1
SEG-1
SFA-1
SEA-1
SEA-1
40 4
3
200-230
380-575
3 SFG-1
SEG-1
SFA-1
SEA-1
50 5
4
3
200
230
380-575
3 SGG-1
SFG-1
SEG-1
SGA-1
SFA-1
SEA-1
60 5
4
200-230
380-575
3 SGG-1
SFG-1
SGA-1
SFA-1
75 5
4
200-230
380-575
3 SGG-1
SFG-1
SGA-1
SFA-1
100 6
5
5
4
200
230
380
460-575
4 SHG-1
SGG-2
SGG-2
SFG-2
SHA-1
SGA-1
SGA-1
SFA-2
125 6
5
200-230
380-575
4 SHG-1
SGG-2
SHA-1
SGA-2
150 6
5
200-230
380-575
4 SHG-1
SGG-2
SHA-1
SGA-2
200 6
6
5
230
380
460-575
5 SHG-2
SHG-2
SGG-3
SHA-2
SHA-2
SGA-2
250 7
6
230
380-575
5 SJG-1
SHG-2
SJA-1
SHA-2
300 7
6
230
380-575
5 SJG-1
SHG-2
SJA-1
SHA-2
350 8
6
230
460-575
6 KG-1
SHA-3
KA-1
SHA-3
400 8
6
230
460-575
6 KG-1
SHG-3
KA-1
SHA-1
450 8
7
230
460-575
6 KG-1
SJG-2
KA-1
JA-2
500 7 460-575 6 SJG-2 SJA-2
600 7 460-575 6 SJG-2 SJA-2
700 8 460-575 6 KG-1 KA-1
800 8 460-575 6 KG-1 KA-1
900 8 460-575 6 KA-1 KA-1

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