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
kr 2 133,58
Each
Units
3 - 17.6 A 400 V 110 → 230 V ac/dc 7.5 kW IP20 151mm 45mm 95mm - - - 3RW30
RS Stock No. 746-4928
Mfr. Part No.3RW3026-1BB14
BrandSiemens
kr 2 492,50
Each
Units
3 - 25 A 400 V 110 → 230 V ac/dc 11 kW IP20 151mm 45mm 125mm - - - 3RW30
RS Stock No. 420-502
Mfr. Part No.3RW4026-1BB14
BrandSiemens
kr 3 260,19
Each
Units
3 200 → 480 V ac 25 A 480 V ac 110 → 230 V ac/dc 11 kW IP20 154mm 45mm 125mm -25°C +60°C - 3RW40
RS Stock No. 656-6562
Mfr. Part No.1SFA896110R7000
BrandABB
kr 5 545,31
Each
Units
3 208 → 600 V 37 A 600 V 100 → 240 V ac 18.5 kW IP10, IP20 153mm 54mm 187mm -25°C +60°C - PSR
RS Stock No. 746-4921
Mfr. Part No.3RW3028-1BB04
BrandSiemens
kr 3 589,20
Each
Units
3 - 38 A 400 V 24 V ac/dc 18.5 kW IP20 151mm 45mm 125mm - - - 3RW30
RS Stock No. 420-495
Mfr. Part No.3RW4028-1BB14
BrandSiemens
kr 4 646,02
Each
Units
3 200 → 480 V ac 38 A 480 V ac 110 → 230 V ac/dc 18.5 kW IP20 125mm 45mm 154mm -25°C +60°C - 3RW40
RS Stock No. 505-5847
Mfr. Part No.ATS01N232QN
kr 3 602,88
Each
Units
3 380 → 415 V 32 A 415 V 24 V dc, 110 → 240 V ac 15 kW IP20 130.7mm 45mm 175mm -10°C +40°C Screw Fixing ATS01
RS Stock No. 766-2541
Mfr. Part No.134930 & DS7-342SX016N0-N
BrandEaton
kr 2 414,57
Each
Units
3 230 → 460 V ac 16 A 460 V ac 110 → 230 V ac 7.5 kW IP20 45mm 118mm 150mm 0°C +40°C - DS7
RS Stock No. 746-4906
Mfr. Part No.3RW3013-1BB14
BrandSiemens
kr 1 326,01
Each
Units
3 - 3.6 A 400 V 110 → 230 V ac/dc 1.5 kW IP20 151mm 45mm 95mm - - - 3RW30
RS Stock No. 420-520
Mfr. Part No.3RW4046-1BB14
BrandSiemens
kr 8 574,20
Each
Units
3 200 → 480 V ac 80 A 480 V ac 110 → 230 V ac/dc 45 kW IP00 188mm 70mm 170mm -25°C +60°C - 3RW40
RS Stock No. 478-4718
Mfr. Part No.ATS01N112FT
kr 2 125,44
Each
Units
3 110 → 480 V 12 A 480 V 24 V dc, 110 → 240 V ac 5.5 kW IP20 130.7mm 45mm 145mm -10°C +40°C - ATS01
RS Stock No. 420-514
Mfr. Part No.3RW4037-1BB14
BrandSiemens
kr 6 570,23
Each
Units
3 200 → 480 V ac 63 A 480 V ac 110 → 230 V ac/dc 30 kW IP00 170mm 55mm 170mm -25°C +60°C - 3RW40
RS Stock No. 820-0719
Mfr. Part No.ATS01N206RT
kr 2 177,28
Each
Units
3 440 → 480 V ac 6 A 460 V ac 120 V ac - IP20 45mm 154mm 135mm -10°C +40 (Without Derating) °C, +50 (With Derating) °C - ATS01
RS Stock No. 810-4560
Mfr. Part No.134949 | DS7-34DSX024N0-D
BrandEaton
kr 3 559,29
Each
Units
3 230 → 460 V ac 24 A 460 V ac 24 V dc 11 kW IP20 150mm 45mm 126mm 0°C +40°C - DS7
RS Stock No. 123-9759
Mfr. Part No.3PH MS3 15kW
BrandTele
kr 4 419,40
Each
Units
3 - 90 A 400 V ac - 15 kW IP40 51mm 181mm 141mm -20°C +50°C DIN Rail MS3
RS Stock No. 420-479
Mfr. Part No.3RW4047-1BB14
BrandSiemens
kr 9 351,86
Each
Units
3 200 → 480 V ac 106 A 480 V ac 110 → 230 V ac/dc 55 kW IP00 188mm 70mm 170mm -25°C +60°C - 3RW40
RS Stock No. 505-5819
Mfr. Part No.ATS01N109FT
kr 2 060,64
Each
Units
3 110 → 480 V 9 A 480 V 24 V dc, 110 → 240 V ac 4 kW IP20 130.7mm 45mm 145mm -10°C +40°C - ATS01
RS Stock No. 325-479
Mfr. Part No.1SFA896106R7000
BrandABB
kr 2 817,52
Each
Units
3 208 → 600 V 12 A 600 V 100 → 240 V ac 5.5 kW IP20 113.5mm 45mm 140mm -25°C +60°C - PSR
RS Stock No. 710-6372
Mfr. Part No.ATS22D32Q
kr 5 935,68
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. 746-4943
Mfr. Part No.3RW4027-1BB04
BrandSiemens
kr 3 878,33
Each
Units
3 - 32 A 400 V 24 V ac/dc 15 kW IP20 154mm 45mm 125mm - - - 3RW40
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