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. 185-9683
Mfr. Part No.3RW5226-1AC14
BrandSiemens
$2,617.84
Each
units
3 200 → 480 V 77 A 480 V 110 → 250 V ac 75 kW IP00 185mm 203mm 305.6mm -25°C +60°C Screw Fixing 3RW52
New
RS Stock No. 200-3973
Mfr. Part No.3RW5073-6TB14
BrandSiemens
$4,169.29
Each
units
3 110 → 250 V 250 A 200 → 480 V 110 → 250 V 160 kW IP00 - - - - - - 3RW50
New
RS Stock No. 200-4026
Mfr. Part No.3RW5076-6TB15
BrandSiemens
$5,837.02
Each
units
3 110 → 250 V 470 A 400 → 600 V 110 → 250 V 315 kW IP00 - - - - - - 3RW50
New
RS Stock No. 200-3962
Mfr. Part No.3RW5073-2TB05
BrandSiemens
$4,586.22
Each
units
3 24 V 250 A 400 → 600 V 24 V 160 kW IP00 - - - - - - 3RW50
RS Stock No. 123-9761
Mfr. Part No.3PH MS3 22kW
BrandTele
$919.39
Each
units
3 - 140 A 400 V ac - 22 kW IP40 51mm 179mm 224mm -20°C +50°C DIN Rail MS3
RS Stock No. 185-9666
Mfr. Part No.3RW5217-1AC14
BrandSiemens
$1,872.90
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. 703-5132
Mfr. Part No.1SFA896114R7000
BrandABB
$1,560.14
Each
units
3 208 → 600 V 85 A 600 V 100 → 240 V ac 45 kW IP10, IP20 180mm 70mm 220mm -25°C +60°C - PSR
New
RS Stock No. 200-3963
Mfr. Part No.3RW5073-2TB14
BrandSiemens
$4,169.29
Each
units
3 110 → 250 V 250 A 200 → 480 V 110 → 250 V 160 kW IP00 - - - - - - 3RW50
New
RS Stock No. 200-3977
Mfr. Part No.3RW5074-2AB14
BrandSiemens
$4,544.52
Each
units
3 110 → 250 V 315 A 200 → 480 V 110 → 250 V 200 kW IP00 - - - - - - 3RW50
RS Stock No. 746-4915
Mfr. Part No.3RW3018-1BB14
BrandSiemens
$535.49
Each
units
3 - 17.6 A 400 V 110 → 230 V ac/dc 7.5 kW IP20 151mm 45mm 95mm - - - 3RW30
New
RS Stock No. 200-4036
Mfr. Part No.3RW5077-6AB04
BrandSiemens
$5,670.24
Each
units
3 24 V 570 A 200 → 480 V 24 V 355 kW IP00 - - - - - - 3RW50
New
RS Stock No. 200-4020
Mfr. Part No.3RW5076-6AB05
BrandSiemens
$5,837.02
Each
units
3 24 V 470 A 400 → 600 V 24 V 315 kW IP00 - - - - - - 3RW50
RS Stock No. 746-4953
Mfr. Part No.3RW4038-1BB04
BrandSiemens
$2,439.13
Each
units
3 - 72 A 400 V 24 V ac/dc 37 kW IP00 170mm 55mm 170mm - - - 3RW40
RS Stock No. 703-5135
Mfr. Part No.1SFA896115R7000
BrandABB
$1,692.63
Each
units
3 208 → 600 V 105 A 600 V 100 → 240 V ac 55 kW IP10, IP20 180mm 70mm 220mm -25°C +60°C - PSR
New
RS Stock No. 200-3995
Mfr. Part No.3RW5075-2AB14
BrandSiemens
$4,919.77
Each
units
3 110 → 250 V 370 A 200 → 480 V 110 → 250 V 250 kW IP00 - - - - - - 3RW50
RS Stock No. 746-4971
Mfr. Part No.3RW4073-6BB44
BrandSiemens
$4,092.59
Each
units
3 - 230 A 400 V 230 V ac 132 kW IP00 278mm 160mm 230mm - - - 3RW40
RS Stock No. 851-7629
Mfr. Part No.1SFA896103R1100
BrandABB
$273.54
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. 710-6461
Mfr. Part No.ATS22C48Q
$8,082.24
Each
units
3 230 → 440 V 480 A 440 V 220 → 230 V 250 kW IP00 339.7mm 304mm 455mm -10°C +40°C - ATS22
RS Stock No. 732-8361
Mfr. Part No.1SFA897109R7000
BrandABB
$2,738.11
Each
units
3 - 106 A 600 V 100 → 250 V 55 kW IP00, IP20 245mm 90mm 185.5mm -25°C +60°C - PSE
New
RS Stock No. 200-3947
Mfr. Part No.3RW5072-2TB14
BrandSiemens
$3,773.21
Each
units
3 110 → 250 V 210 A 200 → 480 V 110 → 250 V 132 kW IP00 - - - - - - 3RW50
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