Soft Starter Price in Sri Lanka – Siemens 3RW Soft Starters from India
Siemens Sirius 3RW Soft Starters — Available on myelectric.in
A soft starter ramps up motor voltage gradually on start-up, eliminating the high inrush current (6–8× full-load) of a direct-on-line start. This reduces mechanical stress on couplings, belts, and gearboxes, and avoids voltage dips that trip other loads. When the motor reaches full speed, the soft starter bypasses itself (internal bypass contactor) and runs at full voltage. At stop, it ramps down the voltage for a smooth deceleration — eliminating water hammer in pump systems.
Siemens Sirius 3RW4 and 3RW5 soft starters cover 15 kW to 400 kW for standard and heavy-duty applications. The 3RW5 range adds PROFINET/Modbus communication and built-in motor protection functions. All units 400V AC, 3-phase.
Siemens 3RW4 and 3RW5 Soft Starters — Buy on myelectric.in
| SKU / Buy | Current Rating | Motor Power | Series |
|---|---|---|---|
| 3RW5245-6AC14 | 315 A | 160 kW | 3RW5 |
| 3RW5075-6AB14 | 370 A | ? kW | 3RW5 |
| 3RW5076-6AB14 | 470 A | ? kW | 3RW5 |
| 3RW5074-6AB14 | 315 A | ? kW | 3RW5 |
| 3RW5516-1HA14 | 32 A | 15 kW | 3RW5 |
| 3RW3027-1BB04 | 32 A | 15 kW | 3RW3 |
| 3RW40281BB14 | 38 A | 18.5 kW | 3RW4 |
| 3RW4047-2BB14 | 106 A | 55 kW | 3RW4 |
| 3RW5536-2HA14 | 171 A | ? kW | 3RW5 |
| 3RW5545-6HA14 | 315 A | 160 kW | 3RW5 |
| 3RW5552-6HA14 | 630 A | 355 kW | 3RW5 |
| 3RW5553-6HA14 | 720 A | 400 kW | 3RW5 |
Why Choose a Siemens Soft Starter for Sri Lanka?
Sri Lanka’s CEB (Ceylon Electricity Board) distribution network is sensitive to voltage dips, especially in industrial zones where multiple large motors start simultaneously. A soft starter cuts inrush to 2–4× full-load current, preventing nuisance tripping of upstream protection. Siemens 3RW units ship from India under the India-Sri Lanka Free Trade Agreement (ISFTA) at zero import duty — making landed cost significantly lower than third-country brands. Lead time from myelectric.in: 3–5 working days to Colombo port.
Soft Starter vs. VFD vs. DOL — Sri Lanka Selection Guide
Use a soft starter when the motor always runs at full speed and you only need controlled starting/stopping (pumps, conveyors, compressors, fans). Use a VFD when you need variable speed control during operation (HVAC, process lines). DOL is suitable only for small motors below 5.5 kW where grid impact is negligible. Soft starters cost significantly less than equivalent VFDs and have lower heat dissipation.
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