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. 766-2517
Mfr. Part No.DS7-340SX012N0-N
BrandEaton
$372.67
Each
units
3 230 → 460 V ac 12 A 460 V ac 24 V ac/dc 5.5 kW IP20 45mm 95mm 130mm 0°C +40°C - DS7
RS Stock No. 710-6411
Mfr. Part No.ATS22D88Q
$1,600.85
Each
units
3 230 → 440 V 88 A 440 V 220 → 230 V 45 kW IP20 247mm 145mm 295mm -10°C +40°C - ATS22
RS Stock No. 478-4774
Mfr. Part No.ATS01N212LU
$289.69
Each
units
3 200 → 240 V 12 A 240 V 24 V dc, 110 → 240 V ac 3 kW IP20 130.7mm 45mm 145mm -10°C +40°C - ATS01
RS Stock No. 852-3589
Mfr. Part No.1SFA898104R7000
BrandABB
$2,392.41
Each
units
3 100 → 250 V 37 (Inline) A, 64 (Inside Delta) A 208 → 600 V - 18.5 kW IP10, IP20 150mm 194mm 314mm -20°C +60°C - PSTX
RS Stock No. 852-3592
Mfr. Part No.1SFA898109R7000
BrandABB
$3,130.17
Each
units
3 100 → 250 V 106 (Inline) A, 181 (Inside Delta) A 208 → 600 V - 55 kW IP10, IP20 150mm 194mm 314mm -20°C +60°C - PSTX
RS Stock No. 152-716
Mfr. Part No.1SFA896106R7000 - PSR12-600-70
BrandABB
$516.12
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. 852-3602
Mfr. Part No.1SFA898110R7000
BrandABB
$4,421.15
Each
units
3 100 → 250 V 143 (Inline) A, 245 (Inside Delta) A 208 → 600 V - 75 kW IP00, IP20 199mm 235mm 377mm -20°C +60°C - PSTX
RS Stock No. 478-4724
Mfr. Part No.ATS01N222LU
$849.29
Each
units
3 200 → 240 V 22 A 240 V 110 → 240 V ac, 24 V dc 5.5 kW IP20 130.7mm 45mm 175mm -10°C +40°C - ATS01
RS Stock No. 123-9759
Mfr. Part No.3PH MS3 15kW
BrandTele
$719.72
Each
units
3 - 90 A 400 V ac - 15 kW IP40 51mm 181mm 141mm -20°C +50°C DIN Rail MS3
RS Stock No. 420-520
Mfr. Part No.3RW4046-1BB14
BrandSiemens
$1,790.37
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. 766-2510
Mfr. Part No.DS7-340SX007N0-N
BrandEaton
$322.30
Each
units
3 230 → 460 V ac 7 A 460 V ac 24 V ac/dc 3 kW IP20 45mm 95mm 130mm 0°C +40°C - DS7
RS Stock No. 732-8346
Mfr. Part No.1SFA897105R7000
BrandABB
$1,397.30
Each
units
3 - 45 A 600 V 100 → 250 V 18.5 kW IP00, IP20 245mm 90mm 185.5mm -25°C +60°C - PSE
RS Stock No. 852-3605
Mfr. Part No.1SFA898111R7000
BrandABB
$4,068.44
Each
units
3 100 → 250 V 171 (Inline) A, 300 (Inside Delta) A 208 → 600 V - 90 kW IP00, IP20 199mm 235mm 377mm -20°C +60°C - PSTX
RS Stock No. 732-8336
Mfr. Part No.1SFA897101R7000
BrandABB
$823.65
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. 152-750
Mfr. Part No.1SFA896103R7000 - PSR3-600-70
BrandABB
$323.99
Each
units
3 208 → 600 V 3.9 A 600 V 100 → 240 V ac 1.5 kW IP20 113.5mm 45mm 140mm -25°C +60°C - PSR
RS Stock No. 152-794
Mfr. Part No.1SFA896111R7000 - PSR45-600-70
BrandABB
$1,192.93
Each
units
3 208 → 600 V 45 A 600 V 100 → 240 V ac 30 kW IP10, IP20 153mm 54mm 187mm -25°C +60°C - PSR
RS Stock No. 746-4978
Mfr. Part No.3RW4056-6BB44
BrandSiemens
$2,596.44
Each
units
3 - 162 A 400 V 230 V ac 90 kW IP00 250mm 120mm 198mm - - - 3RW40
RS Stock No. 785-0751
Mfr. Part No.RSGD4016E0VD20
$370.59
Each
units
3 - 16 A 400 V ac 110 → 400 V ac 4 kW IP20 125mm 45mm 109.8mm -20°C +60°C - RSGD
RS Stock No. 851-7657
Mfr. Part No.1SFA896112R1100
BrandABB
$851.03
Each
units
3 600 V 60 A 208 → 600 V ac 24 V ac/dc 30 kW IP10 70mm 180mm 220mm -20°C +60°C - PSR
RS Stock No. 325-491
Mfr. Part No.1SFA896104R7000
BrandABB
$221.10
Each
units
3 208 → 600 V 6.8 A 600 V 100 → 240 V ac 3 kW IP20 113.5mm 45mm 140mm -25°C +60°C - PSR
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