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

...
Read more Read less

Filters

Viewing 81 - 100 of 444 products
Results per page
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. 820-0986
Mfr. Part No.ATS01N125FT
TWD7,508.00
Each
units
1, 3 110 → 480 V 25 A 110 → 480 V 240 V ac 11 kW IP20 124mm 45mm 131mm -10 (Without Derating) °C, +40 (With Derating) °C +40 (Without Derating) °C, +50 (With Derating) °C - ATS01
New
RS Stock No. 200-3905
Mfr. Part No.3RW5055-2AB04
BrandSiemens
TWD55,087.00
Each
units
3 24 V 143 A 200 → 480 V 24 V 90 kW IP00 - - - - - - 3RW50
New
RS Stock No. 200-3960
Mfr. Part No.3RW5073-2AB15
BrandSiemens
TWD83,580.53
Each
units
3 110 → 250 V 250 A 400 → 600 V 110 → 250 V 160 kW IP00 - - - - - - 3RW50
RS Stock No. 766-2539
Mfr. Part No.DS7-342SX009N0-N
BrandEaton
TWD9,858.00
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. 852-3611
Mfr. Part No.1SFA898114R7000
BrandABB
TWD149,507.00
Each
units
3 100 → 250 V 300 (Inline) A, 515 (Inside Delta) A 208 → 600 V - 160 kW IP00, IP20 258mm 276mm 470mm -20°C +60°C - PSTX
New
RS Stock No. 200-3987
Mfr. Part No.3RW5074-6TB04
BrandSiemens
TWD82,820.71
Each
units
3 24 V 315 A 200 → 480 V 24 V 200 kW IP00 - - - - - - 3RW50
New
RS Stock No. 200-3984
Mfr. Part No.3RW5074-6AB05
BrandSiemens
TWD91,179.00
Each
units
3 24 V 315 A 400 → 600 V 24 V 200 kW IP00 - - - - - - 3RW50
New
RS Stock No. 200-4042
Mfr. Part No.3RW5077-6TB14
BrandSiemens
TWD103,335.93
Each
units
3 110 → 250 V 570 A 200 → 480 V 110 → 250 V 355 kW IP00 - - - - - - 3RW50
RS Stock No. 847-3967
Mfr. Part No.DS7-342SX070N0-N
BrandEaton
TWD26,980.00
Each
units
3 230 → 460 V ac 70 A 400 V 110 → 230 V ac 37 kW IP20 93mm 161mm 156mm 0°C +40°C - DS7
RS Stock No. 325-463
Mfr. Part No.1SFA896105R7000
BrandABB
TWD6,893.00
Each
units
3 208 → 600 V 9 A 600 V 100 → 240 V ac 4 kW IP20 113.5mm 45mm 140mm -25°C +60°C - PSR
RS Stock No. 185-9641
Mfr. Part No.3RW5213-1TC04
BrandSiemens
TWD23,564.00
Each
units
3 200 → 480 V 13 A 480 V 24 V ac/dc 11 kW IP20 170mm 152mm 274.8mm -25°C +60°C Screw Fixing 3RW52
New
RS Stock No. 200-3919
Mfr. Part No.3RW5055-6TB05
BrandSiemens
TWD60,785.84
Each
units
3 24 V 143 A 400 → 600 V 24 V 90 kW IP00 - - - - - - 3RW50
New
RS Stock No. 200-3932
Mfr. Part No.3RW5056-6AB05
BrandSiemens
TWD68,384.00
Each
units
3 24 V 171 A 400 → 600 V 24 V 110 kW IP00 - - - - - - 3RW50
New
RS Stock No. 200-4038
Mfr. Part No.3RW5077-6AB14
BrandSiemens
TWD103,335.93
Each
units
3 110 → 250 V 570 A 200 → 480 V 110 → 250 V 355 kW IP00 - - - - - - 3RW50
RS Stock No. 185-9708
Mfr. Part No.3RW5243-6AC04
BrandSiemens
TWD99,942.00
Each
units
3 200 → 480 V 210 A 480 V 24 V ac/dc 200 kW IP00 210mm 202.5mm 388mm -25°C +60°C Screw Fixing 3RW52
RS Stock No. 240-9134
Mfr. Part No.BA9026 3AC50/60Hz 200-460V 3kW
BrandDold
TWD14,042.00
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. 185-9739
Mfr. Part No.3RW5248-6AC14
BrandSiemens
TWD214,105.00
Each
units
3 200 → 480 V 570 A 480 V 110 → 250 V ac 560 kW IP00 210mm 202.5mm 388mm -25°C +60°C Screw Fixing 3RW52
RS Stock No. 746-4931
Mfr. Part No.3RW4024-1BB04
BrandSiemens
TWD10,677.00
Each
units
3 - 12.5 A 400 V 24 V ac/dc 5.5 kW IP20 154mm 45mm 125mm - - - 3RW40
RS Stock No. 810-4541
Mfr. Part No.134943 | DS7-34DSX004N0-D
BrandEaton
TWD9,245.00
Each
units
3 230 → 460 V ac 4 A 460 V ac 24 V dc 1.5 kW IP20 130mm 45mm 103mm 0°C +40°C - DS7
New
RS Stock No. 200-3977
Mfr. Part No.3RW5074-2AB14
BrandSiemens
TWD82,821.00
Each
units
3 110 → 250 V 315 A 200 → 480 V 110 → 250 V 200 kW IP00 - - - - - - 3RW50