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. 420-508
Mfr. Part No.3RW4027-1BB14
BrandSiemens
TWD14,364.00
Each
units
3 200 → 480 V ac 32 A 480 V ac 110 → 230 V ac/dc 15 kW IP20 154mm 45mm 125mm -25°C +60°C - 3RW40
RS Stock No. 478-4730
Mfr. Part No.ATS01N222QN
TWD9,498.00
Each
units
3 380 → 415 V 22 A 415 V - 11 kW IP20 130.7mm 45mm 175mm -10°C +40°C Screw Fixing ATS01
RS Stock No. 478-4780
Mfr. Part No.ATS01N212QN
TWD7,242.00
Each
units
3 380 → 415 V 12 A 415 V 24 V dc, 110 → 240 V ac 5.5 kW IP20 130.7mm 45mm 145mm -10°C +40°C - ATS01
RS Stock No. 420-514
Mfr. Part No.3RW4037-1BB14
BrandSiemens
TWD23,787.00
Each
units
3 200 → 480 V ac 63 A 480 V ac 110 → 230 V ac/dc 30 kW IP00 170mm 55mm 170mm -25°C +60°C - 3RW40
RS Stock No. 505-5803
Mfr. Part No.ATS01N103FT
TWD6,700.00
Each
units
3 110 → 480 V 3 A 480 V 24 V dc, 110 → 240 V ac 1.1 kW IP20 100.4mm 22.5mm 100mm -10°C +40°C - ATS01
RS Stock No. 420-502
Mfr. Part No.3RW4026-1BB14
BrandSiemens
TWD12,870.00
Each
units
3 200 → 480 V ac 25 A 480 V ac 110 → 230 V ac/dc 11 kW IP20 154mm 45mm 125mm -25°C +60°C - 3RW40
RS Stock No. 420-524
Mfr. Part No.3RW4038-1BB14
BrandSiemens
TWD27,653.00
Each
units
3 200 → 480 V ac 72 A 480 V ac 110 → 230 V ac/dc 37 kW IP00 170mm 55mm 170mm -25°C +60°C - 3RW40
RS Stock No. 822-6118
Mfr. Part No.ATS48D32Y
TWD40,515.00
Each
units
3 208 → 690 V 32 A 690 V 110 → 230 V 22 kW IP20 160mm 275mm 190mm - - - ATS48
RS Stock No. 820-0719
Mfr. Part No.ATS01N206RT
TWD4,391.00
Each
units
3 440 → 480 V ac 6 A 460 V ac 120 V ac - IP20 45mm 154mm 135mm -10°C +40 (Without Derating) °C, +50 (With Derating) °C - ATS01
RS Stock No. 746-4940
Mfr. Part No.3RW4026-1BB04
BrandSiemens
TWD12,575.00
Each
units
3 - 25 A 400 V 24 V ac/dc 11 kW IP20 154mm 45mm 125mm - - - 3RW40
RS Stock No. 478-4718
Mfr. Part No.ATS01N112FT
TWD5,414.00
Each
units
3 110 → 480 V 12 A 480 V 24 V dc, 110 → 240 V ac 5.5 kW IP20 130.7mm 45mm 145mm -10°C +40°C - ATS01
RS Stock No. 478-4702
Mfr. Part No.ATS01N106FT
TWD4,081.00
Each
units
3 110 → 480 V 6 A 480 V 24 V dc, 110 → 240 V ac 2.2 kW IP20 100.4mm 22.5mm 100mm -10°C +40°C - ATS01
RS Stock No. 732-8336
Mfr. Part No.1SFA897101R7000
BrandABB
TWD19,967.00
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. 152-801
Mfr. Part No.1SFA896110R7000 - PSR37-600-70
BrandABB
TWD14,429.00
Each
units
3 208 → 600 V 37 A 600 V 100 → 240 V ac 18.5 kW IP10, IP20 153mm 54mm 187mm -25°C +60°C - PSR
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. 847-3964
Mfr. Part No.DS7-342SX100N0-N
BrandEaton
TWD25,232.00
Each
units
3 230 → 460 V ac 100 A 400 V 110 → 230 V ac 55 kW IP20 93mm 161mm 156mm 0°C +40°C Screw fixing DS7
RS Stock No. 185-9661
Mfr. Part No.3RW5216-1TC04
BrandSiemens
TWD32,095.00
Each
units
3 200 → 480 V 32 A 480 V 24 V ac/dc 22 kW IP00 170mm 152mm 274.8mm -25°C +60°C Screw Fixing 3RW52
RS Stock No. 710-6433
Mfr. Part No.ATS22C14Q
TWD52,836.00
Each
units
3 230 → 440 V 140 A 440 V 220 → 230 V 75 kW IP00 269.5mm 150mm 356mm -10°C +40°C - ATS22
RS Stock No. 185-9656
Mfr. Part No.3RW5215-1TC14
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
New
RS Stock No. 202-1673
Mfr. Part No.3RW5513-1HA14
BrandSiemens
TWD33,432.00
Each
units
3 200 → 480 V 13 A 480 V 110 → 250 V 3 kw IP00 - - - - - - 3RW5