Soft Starts

A Soft start motor is a device used typically with electrical AC motors.

How do they work?

They work by helping reduce the torque and load in the power up and electrical current surges that are typical with motors during their start-up phase. The soft start only does this temporary however as it is only needed primarily during start-up

Features and benefits:
•Can control multiple phases of power up


•Control of starting toque in machinery


•Motor power ratings ranging up to 700 kW and above


•Inline contactors are not necessary if the machine it is used on is electrically isolated


•Control starting times of the soft start


•Voltage boost functions available to control over toque


•Can be mounted to DIN, panels or simply snap on capabilities





Where might I use one?
•Smaller size cranes


•Automatic doors/gates


•Fans or pumps


•Conveyor belts


•Compressors

...
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Description Price Phase Supply Voltage Current Rating Voltage Rating Control Voltage Power Rating IP Rating Overall Length Overall Width Overall Depth Minimum Operating Temperature Maximum Operating Temperature Mounting Type Series
RS Stock No. 746-4915
Mfr. Part No.3RW3018-1BB14
BrandSiemens
$477.26
Each
units
3 - 17.6 A 400 V 110 → 230 V ac/dc 7.5 kW IP20 151mm 45mm 95mm - - - 3RW30
RS Stock No. 785-0745
Mfr. Part No.RSE2312-BS
$205.65
Each
units
1 - 12 A 230 V ac 24 → 110 V ac, 110 → 480 V ac/dc 3kW IP20 77.4mm 45mm 102.5mm -20°C +50°C - RSE
RS Stock No. 851-7629
Mfr. Part No.1SFA896103R1100
BrandABB
$201.93
Each
units
3 600 V 3.9 A 208 → 600 V ac 24 V ac/dc 1.5 kW IP20 45mm 114mm 140mm -20°C +60°C - PSR
RS Stock No. 766-2539
Mfr. Part No.DS7-342SX009N0-N
BrandEaton
$335.74
Each
units
3 230 → 460 V ac 9 A 460 V ac 110 → 230 V ac 4 kW IP20 45mm 95mm 130mm 0°C +40°C - DS7
RS Stock No. 123-9754
Mfr. Part No.3PH MS3 3.0kW
BrandTele
$306.57
Each
units
3 - 20 A 400 V ac - 3 kW IP40 42mm 130mm 128mm -20°C +50°C DIN Rail MS3
RS Stock No. 608-7097
Mfr. Part No.ATS48D47Q
$1,761.20
Each
units
3 230 → 415 V 47 A 415 V 220 → 415 V 22 kW IP20 190mm 160mm 275mm -10°C +40°C - ATS48
RS Stock No. 420-508
Mfr. Part No.3RW4027-1BB14
BrandSiemens
$1,221.27
Each
units
3 200 → 480 V ac 32 A 480 V ac 110 → 230 V ac/dc 15 kW IP20 154mm 45mm 125mm -25°C +60°C - 3RW40
RS Stock No. 746-4971
Mfr. Part No.3RW4073-6BB44
BrandSiemens
$3,647.59
Each
units
3 - 230 A 400 V 230 V ac 132 kW IP00 278mm 160mm 230mm - - - 3RW40
RS Stock No. 746-4940
Mfr. Part No.3RW4026-1BB04
BrandSiemens
$621.08
Each
units
3 - 25 A 400 V 24 V ac/dc 11 kW IP20 154mm 45mm 125mm - - - 3RW40
RS Stock No. 710-6372
Mfr. Part No.ATS22D32Q
$946.46
Each
units
3 230 → 440 V 32 A 440 V 220 → 230 V 15 kW IP20 209mm 130mm 265mm -10°C +40°C - ATS22
RS Stock No. 732-8368
Mfr. Part No.1SFA897111R7000
BrandABB
$2,583.28
Each
units
3 - 171 A 600 V 100 → 250 V 75 kW IP00, IP20 295mm 130mm 219.5mm -25°C +60°C - PSE
RS Stock No. 240-9134
Mfr. Part No.BA9026 3AC50/60Hz 200-460V 3kW
BrandDold
$549.28
Each
units
3 200 → 460 V ac 8 A 460 V 0 → 28.8 V dc 3 kW IP20, IP40 121mm 45mm 74mm 0°C +55°C - BA9026
RS Stock No. 608-7104
Mfr. Part No.ATS48D62Q
$1,814.75
Each
units
3 230 → 415 V 62 A 415 V 220 → 415 V 30 kW IP20 235mm 190mm 290mm -10°C +40°C - ATS48
RS Stock No. 746-4906
Mfr. Part No.3RW3013-1BB14
BrandSiemens
$317.75
Each
units
3 - 3.6 A 400 V 110 → 230 V ac/dc 1.5 kW IP20 151mm 45mm 95mm - - - 3RW30
RS Stock No. 608-7031
Mfr. Part No.ATS48C25Q
$4,417.50
Each
units
3 230 → 415 V 250 A 415 V 220 → 415 V 132 kW IP00 265mm 320mm 380mm -10°C +40°C - ATS48
RS Stock No. 608-7053
Mfr. Part No.ATS48D17Q
$1,241.67
Each
units
3 230 → 415 V 17 A 415 V 220 → 415 V 7.5 kW IP20 190mm 160mm 275mm -10°C +40°C - ATS48
RS Stock No. 851-7638
Mfr. Part No.1SFA896107R1100
BrandABB
$396.39
Each
units
3 600 V 16 A 208 → 600 V ac 24 V ac/dc 7.5 kW IP20 45mm 114mm 140mm -20°C +60°C - PSR
RS Stock No. 766-2501
Mfr. Part No.DS7-340SX004N0-N
BrandEaton
$296.23
Each
units
3 230 → 460 V ac 4 A 460 V ac 24 V ac/dc 1.5 kW IP20 45mm 95mm 130mm 0°C +40°C - DS7
RS Stock No. 851-7663
Mfr. Part No.1SFA896115R1100
BrandABB
$1,526.17
Each
units
3 600 V 105 A 208 → 600 V ac 24 V ac/dc 55 kW IP10 70mm 180mm 220mm -20°C +60°C - PSR
RS Stock No. 766-2523
Mfr. Part No.DS7-340SX032N0-N
BrandEaton
$694.43
Each
units
3 230 → 460 V ac 32 A 460 V ac 24 V ac/dc 15 kW IP20 45mm 118mm 150mm 0°C +40°C - DS7
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