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. 136-6387
Mfr. Part No.ADXL0060600
BrandLovato
TWD22,173.00
Each
units
2 100 → 240 V ac 60 A 600 V ac - 30 kW IP00 75mm 170mm 220mm -20°C +40°C DIN Rail ADXL
RS Stock No. 822-6102
Mfr. Part No.ATS48D17Y
TWD34,265.00
Each
units
3 208 → 690 V 17 A 690 V 110 → 230 V 15 kW IP20 160mm 275mm 190mm - - - ATS48
RS Stock No. 851-7641
Mfr. Part No.1SFA896109R1100
BrandABB
TWD11,461.00
Each
units
3 600 V 30 A 208 → 600 V ac 24 V ac/dc 15 kW IP20 45mm 128mm 160mm -20°C +60°C - PSR
RS Stock No. 746-4962
Mfr. Part No.3RW4038-1TB04
BrandSiemens
TWD32,545.00
Each
units
3 - 72 A 400 V 24 V ac/dc 37 kW IP00 170mm 55mm 170mm - - - 3RW40
RS Stock No. 330-5358
Mfr. Part No.SSC-25
TWD1,851.00
Each
units
1 230 V ac 25 A 230 V - - - - - - -20°C +85°C - -
RS Stock No. 847-3954
Mfr. Part No.DS7-342SX041N0-N
BrandEaton
TWD19,319.00
Each
units
3 230 → 460 V ac 41 A 400 V 110 → 230 V ac 22 kW IP20 108mm 215mm 195mm 0°C +40°C - DS7
RS Stock No. 185-9681
Mfr. Part No.3RW5225-1TC14
BrandSiemens
TWD45,503.00
Each
units
3 200 → 480 V 63 A 480 V 110 → 250 V ac 55 kW IP00 185mm 203mm 305.6mm -25°C +60°C Screw Fixing 3RW52
RS Stock No. 185-9666
Mfr. Part No.3RW5217-1AC14
BrandSiemens
TWD35,752.00
Each
units
3 200 → 480 V 38 A 480 V 110 → 250 V ac 30 kW IP00 170mm 152mm 274.8mm -25°C +60°C Screw Fixing 3RW52
RS Stock No. 185-9654
Mfr. Part No.3RW5215-1AC14
BrandSiemens
TWD28,845.00
Each
units
3 200 → 480 V 25 A 480 V 110 → 250 V ac 18.5 kW IP20 170mm 152mm 274.8mm -25°C +60°C Screw Fixing 3RW52
RS Stock No. 703-5129
Mfr. Part No.1SFA896112R7000
BrandABB
TWD22,185.00
Each
units
3 208 → 600 V 60 A 600 V 100 → 240 V ac 30 kW IP10, IP20 180mm 70mm 220mm -25°C +60°C - PSR
RS Stock No. 732-8358
Mfr. Part No.1SFA897107R7000
BrandABB
TWD42,799.00
Each
units
3 - 72 A 600 V 100 → 250 V 30 kW IP00, IP20 245mm 90mm 185.5mm -25°C +60°C - PSE
RS Stock No. 766-2548
Mfr. Part No.DS7-342SX012N0-N
BrandEaton
TWD10,728.00
Each
units
3 230 → 460 V ac 12 A 460 V ac 110 → 230 V ac 5.5 kW IP20 45mm 95mm 130mm 0°C +40°C - DS7
RS Stock No. 851-7635
Mfr. Part No.1SFA896106R1100
BrandABB
TWD7,434.00
Each
units
3 600 V 12 A 208 → 600 V ac 24 V ac/dc 5.5 kW IP20 45mm 114mm 140mm -20°C +60°C - PSR
RS Stock No. 851-7626
Mfr. Part No.1SFA896105R1100
BrandABB
TWD6,867.00
Each
units
3 600 V 9 A 208 → 600 V ac 24 V ac/dc 4 kW IP20 45mm 114mm 140mm -20°C +60°C - PSR
RS Stock No. 822-6159
Mfr. Part No.ATS22D32S6
TWD26,575.00
Each
units
3 208 → 600 V 32 A 600 V 230 V 18.5 kW IP54 130mm 265mm 209mm -10°C +40°C - ATS22
RS Stock No. 136-3704
Mfr. Part No.PFE-08
BrandFairford
TWD7,714.00
Each
units
3 230 → 460 V ac 4.8 A @ 460 V ac, 6.5 A @ 400 V ac 460 V ac 0 → 24 V dc 3 kW @ 400 V ac IP20 55mm 120mm 165mm 0°C +40°C DIN Rail -
RS Stock No. 185-9682
Mfr. Part No.3RW5226-1AC04
BrandSiemens
TWD49,972.00
Each
units
3 200 → 480 V 77 A 480 V 24 V ac/dc 75 kW IP00 185mm 203mm 305.6mm -25°C +60°C Screw Fixing 3RW52
RS Stock No. 420-491
Mfr. Part No.3RW4024-1BB14
BrandSiemens
TWD10,265.00
Each
units
3 200 → 480 V ac 12.5 A 480 V ac 110 → 230 V ac/dc 5.5 kW IP20 154mm 45mm 125mm -25°C +60°C - 3RW40
RS Stock No. 746-4971
Mfr. Part No.3RW4073-6BB44
BrandSiemens
TWD52,994.00
Each
units
3 - 230 A 400 V 230 V ac 132 kW IP00 278mm 160mm 230mm - - - 3RW40
RS Stock No. 185-9721
Mfr. Part No.3RW5245-6AC04
BrandSiemens
TWD138,132.00
Each
units
3 200 → 480 V 315 A 480 V 24 V ac/dc 315 kW IP00 210mm 202.5mm 388mm -25°C +60°C Screw Fixing 3RW52