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Specification & Description
| Specification | Description |
|---|---|
| Part Number | 3RW4027-1BB04 |
| Alternative Part Number | 3RW40271BB04 |
| Manufacturer | Siemens |
| Category | Soft Starts |
| Operating Voltage Range | 200 to 480 V ac |
| Phase | 3 Phase |
| Operating Current at 40 °C | 32 A |
| Operating Current at 50 °C | 29 A |
| Operating Current at 60 °C | 26 A |
| Mechanical Power Output at 400 V | 15 kW |
| Operating Frequency | 50 to 60 Hz |
| Control Supply Voltage | AC/DC 24 V |
| Connection Type | Screw terminals |
| Ambient Operating Temperature Range | -25 to +60 °C |
| Storage Temperature Range | -40 to +80 °C |
| Protection Class | IP20 |
| Installation Altitude | Up to 5,000 m above sea level |
| Motor Overload Protection | Yes |
| Integrated Bypass Contact System | Yes |
| Adjustable Current Limitation | Yes |
| Width | 45 mm |
| Height | 125 mm |
| Depth | 155 mm |
| Mounting Type | Screw and snap-on mounting |
| Number of Poles for Main Circuit | 3 |
| Auxiliary Contact Ratings | B300 / R300 according to UL |
| Mechanical Performance for AC Motor | 7.5 hp at 220/230 V, 20 hp at 460/480 V |
The Siemens 3RW4027-1BB04 is a high-quality soft starter designed to facilitate the controlled ramp-up and slow-down of three-phase motors, enhancing the longevity of motor systems and reducing mechanical stress on motor shafts and electrical stress on power systems. This soft starter is suitable for a wide range of industrial applications, including pumps, fans, and conveyors, where smooth operation and energy efficiency are paramount.
With an operational voltage range of 200 to 480 V AC and a control voltage of 24 V AC/DC, the 3RW4027-1BB04 is versatile and can be integrated into various electrical setups. It is capable of handling motors with a power output of up to 15 kW at 400 V in a 40 °C environment, making it a robust choice for medium-sized applications.
The unit comes equipped with an integrated bypass contact system, which helps to reduce power loss and heat generation once the motor reaches full speed. Additionally, the soft starter features thyristors for reliable performance and includes intrinsic device protection to safeguard against potential faults.
The 3RW4027-1BB04 also offers motor overload protection, which is essential for preventing damage due to excessive current draw. While it does not evaluate thermistor motor protection, it does allow for external reset and adjustable current limitation, giving users greater control over motor start and stop parameters.
This soft starter is designed with a compact footprint and screw terminals for straightforward installation. It is rated for an insulation voltage of 600 V and conforms to a pollution degree of 3 according to IEC 60947-4-2, ensuring it meets the rigorous standards for industrial electrical devices.
The Siemens 3RW4027-1BB04 soft starter is a reliable and efficient solution for managing the demands of three-phase motors in industrial environments, providing smooth startups, improved energy efficiency, and enhanced motor protection.
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Frequently Asked Questions
What is the voltage range for this soft starter?
The soft starter is designed for a voltage range of 200 to 480 V ac, making it suitable for a variety of three-phase power supplies.
Can this soft starter be used in hazardous locations?
Yes, the soft starter has a general product approval for EMC and is suitable for use in hazardous locations.
What is the maximum operating altitude for this device?
The device can be installed at altitudes up to 5,000 metres above sea level without derating.
What are the ambient temperature limits for operating this soft starter?
The soft starter can operate within an ambient temperature range of -25 to +60 degrees Celsius.
Does this soft starter come with an integrated bypass contact system?
Yes, the soft starter includes an integrated bypass contact system.
What is the protection class of this soft starter?
The soft starter has a protection class of IP20.
What is the horsepower rating for motors connected at 460/480 V?
For motors connected at 460/480 V, the soft starter can handle a horsepower rating of up to 20 hp.
Is there a need for external motor overload protection with this soft starter?
No, the soft starter comes with built-in motor overload protection.
Can the current limitation be adjusted on this soft starter?
Yes, the soft starter allows for adjustable current limitation to suit various starting conditions.
What type of terminals does this soft starter have for wiring?
The soft starter is equipped with screw terminals for secure and reliable wiring connections.
