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attributes.Features

attributes.Power_Rating

attributes.Motor_Starter_Type

attributes.Range

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attributes.Current_Rating

attributes.IP_Rating

attributes.Number_of_Poles

attributes.Motor_Starter_Functionality

attributes.Additional_Features

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attributes.Better_World_Product

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Siemens SIRIUS 3RW Motor Starter, , 1.2 MW, 480 V ac, 3 Phase

Siemens SIRIUS 3RW Soft Starter, , 7.5 kW, 480 V ac, 3 Phase, IP20


Motor starters are electrical devices that safely start, stop, and protect electric motors against overload and other faults. They are critical in managing the power delivery to motors, ensuring their smooth operation. Motor starters typically consist of two main components: a contactor and an overload relay.

Motor starters offer several key benefits that enhance the performance and safety of electric motors. Firstly, they protect from overload by preventing motors from drawing excessive current, which can lead to overheating and damage. Additionally, motor starters ensure a smooth start and stop, allowing for a controlled and gradual increase in motor speed. This reduces mechanical stress and extends the lifespan of the motor. Enhanced safety is another significant advantage, as motor starters offer overload and short-circuit protection, thereby improving the overall safety of the electrical system. Furthermore, some motor starters, such as soft starters, contribute to energy efficiency by controlling the inrush current and torque during startup, which helps in reducing energy consumption.

### What are the types of motor starters?
- [**Direct-On-Line (DOL) Starter**](https://uk.rs-online.com/web/c/automation-control-gear/electric-motors/motor-starters/?if=direct-on-line-starters)**:** The DOL starter is the simplest and most basic type of motor starter. It directly connects the motor to the power supply, providing full voltage during start-up. This type of starter is suitable for small motors with low starting currents and minimal load torque.
- [**Star-Delta Starter**](https://uk.rs-online.com/web/c/automation-control-gear/electric-motors/motor-starters/?if=star-delta-starter-motors)**:** The star-delta starter is used for large induction motors. It employs a special switching mechanism to initially start the motor in a "star" configuration, which reduces the starting current, and then switches to a "delta" configuration for normal operation.
- **Soft Starter:** A soft starter gradually increases the voltage and current supplied to the motor during startup, reducing the impact on the electrical system. It provides a controlled and smooth acceleration, minimizing mechanical and electrical stress.
- **Reversing Starter:** also known as a reversing motor starter, is a type of motor starter that allows an electric motor to be operated in both forward and reverse directions. It provides the necessary control and switching functions to change the motor's rotation direction.

Our extensive selection of high-quality Motor Starters is supplied to you from industry-leading brands including [Schneider Electric](https://uk.rs-online.com/web/c/automation-control-gear/electric-motors/motor-starters/?if=schneider-electric-motor-starters) Lovato [Siemens](https://uk.rs-online.com/web/c/automation-control-gear/electric-motors/motor-starters/?if=siemens-motor-starters) Eaton [ABB](https://uk.rs-online.com/web/c/automation-control-gear/electric-motors/motor-starters/?if=abb-motor-starters ) Phoenix Contact and [Allen Bradley](https://uk.rs-online.com/web/c/automation-control-gear/electric-motors/motor-starters/?if=allen-bradley-motor-starters)

The range also includes [Better World Products](https://uk.rs-online.com/web/content/m/better-world), making it easier to choose greener and environmentally friendly solutions for business.



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