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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RW3018-1BB14 |
| Alternative Part Number | 3RW30181BB14 |
| Manufacturer | Siemens |
| Product Type | Soft Starter |
| Application Phase | 3 Phase |
| Rated Operational Current | 17.6 A at 40 °C |
| Control Supply Voltage | 110 to 230 V AC/DC |
| Operational Voltage Range | 200 to 480 V AC |
| Power Rating | 7.5 kW at 400 V |
| Frequency | 50 to 60 Hz |
| Dimensions | 95 mm x 45 mm x 150 mm |
| Mounting Type | Screw and snap-on mounting |
| Mounting Position | Vertical mounting surface +/-10° rotatable, tiltable to the front and back |
| Installation Altitude | Up to 5,000 m above sea level |
| Cable Length | Maximum 300 m |
| Number of Poles | 3 for main current circuit |
| Electrical Connection | Screw-type terminals for main and auxiliary/control circuit |
| Number of Auxiliary Contacts | 1 Normally Open (NO) |
| Conductor Cross-Section | Main contacts: 2x (1 ... 2.5 mm²) solid, 2x (2.5 ... 6 mm²) solid |
| Ambient Operating Temperature | -25 to +60 °C during operation |
| Storage Temperature | -40 to +80 °C |
| Derating Temperature | 40 °C |
| Protection Class | IP20 |
| Certifications/Approvals | General Product Approval, EMC, UL/CSA ratings |
The Siemens 3RW3018-1BB14 soft starter is a compact and efficient solution designed to optimise the start-up process of three-phase motors. This device is engineered to reduce the mechanical stress on motor control systems, making it an ideal choice for a wide range of industrial applications. With a rated operational current of 17.6 A and the capability to manage motors with a power output of up to 7.5 kW at 400 V, it is suitable for a variety of medium-duty tasks.
The soft starter operates within a supply voltage range of 200 to 480 V AC and can handle control supply voltages of 110 to 230 V AC/DC, providing flexibility for integration into diverse electrical setups. Its compact dimensions, 95 x 45 x 150 mm, allow for space-saving installation, and the screw terminals ensure a secure and reliable connection.
This model comes equipped with an integrated bridging contact system and thyristors, yet it does not include intrinsic device protection or motor overload protection, allowing for customised protection schemes to be implemented as required. The absence of an internal bypass circuit means that the device is optimised for applications where soft starting and stopping are necessary to prevent mechanical shocks and electrical peaks.
The 3RW3018-1BB14 is designed for straightforward installation with options for screw and snap-on mounting, and it can be positioned with a degree of flexibility, thanks to its rotatable and tiltable mounting options. It is also designed to work reliably in a wide range of ambient temperatures, from -25 to +60 degrees Celsius, ensuring consistent performance in varying environmental conditions.
With its robust construction and adherence to international standards, including a protection class of IP20, this soft starter is a durable and reliable component for managing the demands of starting electric motors.
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Frequently Asked Questions
What is the purpose of a soft starter like the Siemens 3RW3018-1BB14?
The Siemens soft starter is designed to reduce the inrush current and torque of the motor during startup. This helps in reducing mechanical stress on the motor and the electrodynamic stresses on the power cables and electrical distribution network, leading to a smoother and more gradual start-up of machines and equipment.
Can this soft starter be used for three-phase motors?
Yes, the Siemens 3RW3018-1BB14 is specifically designed for starting three-phase motors, providing a controlled ramp-up to full speed.
What are the voltage requirements for operating this soft starter?
The soft starter operates with a control supply voltage of 110 to 230 V AC/DC and can handle an operating voltage for the main circuit of 200 to 480 V AC.
Is there an integrated bypass contact system in this soft starter?
Yes, the Siemens 3RW3018-1BB14 comes with an integrated bypass contact system.
Does this soft starter provide motor overload protection?
No, the Siemens 3RW3018-1BB14 does not have an intrinsic motor overload protection feature. Additional protection devices may be required depending on the application.
What is the rated operational current of this soft starter?
The rated operational current of the Siemens 3RW3018-1BB14 at 40°C is 17.6 A.
What are the dimensions of the Siemens 3RW3018-1BB14?
The dimensions of the soft starter are 95 mm in height, 45 mm in width, and 150 mm in depth.
What is the protection class of the Siemens 3RW3018-1BB14?
The protection class for this soft starter is IP20.
Can the Siemens 3RW3018-1BB14 be used in delta configurations?
No, the Siemens 3RW3018-1BB14 does not support inside-delta (Δ) circuit configurations.
What is the ambient temperature range for operating the Siemens 3RW3018-1BB14?
The soft starter can operate within an ambient temperature range of -25 to +60 degrees Celsius.
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