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. 820-1006
Mfr. Part No.ATS48D88Y
€2,375.52
Each
units
3 208 → 690 V ac 88 A 208 → 690 V ac 110 → 230 V ac 75 kW IP00, IP20 190mm 290mm 235mm -10°C +40°C - ATS48
RS Stock No. 477-4979
Mfr. Part No.150-C85NBR
€1,482.00
Each
units
3 200 460 V ac 85 A 460 V ac 24 V ac/dc 45 kW IP2X 130mm 72mm 206mm -5°C +50°C - SMC-3
RS Stock No. 608-7031
Mfr. Part No.ATS48C25Q
€2,118.68
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. 418-6849
Mfr. Part No.150-C19NBD
€439.40
Each
units
3 200 460 V ac 19 A 460 V ac 100 240 V ac 7.5 kW IP2X 100mm 44.8mm 139.7mm -5°C +50°C - SMC-3
RS Stock No. 185-9652
Mfr. Part No.3RW5215-1AC04
BrandSiemens
€833.92
Each
units
3 200 480 V 25 A 480 V 24 V ac/dc 18.5 kW IP20 170mm 152mm 274.8mm -25°C +60°C Screw Fixing 3RW52
RS Stock No. 185-9706
Mfr. Part No.3RW5236-6TC14
BrandSiemens
€2,478.28
Each
units
3 200 480 V 171 A 480 V 110 250 V ac 160 kW IP00 185mm 203mm 305.6mm -25°C +60°C Screw Fixing 3RW52
RS Stock No. 123-9760
Mfr. Part No.3PH MS3 18.5kW
BrandTele
€481.85
Each
units
3 - 110 A 400 V ac - 18.5 kW IP40 51mm 179mm 224mm -20°C +50°C DIN Rail MS3
RS Stock No. 746-4965
Mfr. Part No.3RW4055-6BB44
BrandSiemens
€1,104.36
Each
units
3 - 134 A 400 V 230 V ac 75 kW IP00 250mm 120mm 198mm - - - 3RW40
RS Stock No. 732-8336
Mfr. Part No.1SFA897101R7000
BrandABB
€519.97
Each
units
3 - 18 A 600 V 100 250 V 5.5 kW IP00, IP20 245mm 90mm 185.5mm -25°C +60°C - PSE
RS Stock No. 820-1002
Mfr. Part No.ATS48D75Y
€1,858.04
Each
units
3 208 → 690 V ac 75 A 208 → 690 V ac 110 → 230 V ac 55 kW IP00, IP20 190mm 290mm 235mm -10°C +40°C - ATS48
RS Stock No. 185-9721
Mfr. Part No.3RW5245-6AC04
BrandSiemens
€3,993.44
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
RS Stock No. 847-3954
Mfr. Part No.DS7-342SX041N0-N
BrandEaton
€751.58
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. 608-7110
Mfr. Part No.ATS48D75Q
€927.89
Each
units
3 230 → 415 V 75 A 415 V 220 → 415 V 37 kW IP20 235mm 190mm 290mm -10°C +40°C - ATS48
RS Stock No. 418-6833
Mfr. Part No.150-C16NBD
€406.90
Each
units
3 200 460 V ac 16 A 460 V ac 100 240 V ac 7.5 kW IP2X 100mm 44.8mm 139.7mm -5°C +50°C - SMC-3
RS Stock No. 185-9682
Mfr. Part No.3RW5226-1AC04
BrandSiemens
€1,444.69
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. 185-9696
Mfr. Part No.3RW5235-6AC04
BrandSiemens
€2,137.67
Each
units
3 200 480 V 143 A 480 V 24 V ac/dc 132 kW IP00 185mm 203mm 305.6mm -25°C +60°C Screw Fixing 3RW52
RS Stock No. 785-0751
Mfr. Part No.RSGD4016E0VD20
€247.87
Each
units
3 - 16 A 400 V ac 110 400 V ac 4 kW IP20 125mm 45mm 109.8mm -20°C +60°C - RSGD
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