What is the rated current and power of the Siemens 3RW3037-1BB14?

The Siemens 3RW3037-1BB14 has a rated operating current of 72 A at 40°C ambient temperature, corresponding to approximately 37 kW for a standard three-phase asynchronous motor at 400 V AC.

What certifications does the Siemens 3RW3037-1BB14 comply with?

The Siemens 3RW3037-1BB14 complies with CE (LVD 2014/35/EU and EMC Directive 2014/30/EU), UL 508, CSA C22.2 No.14, EC/EN 60947-4-2 and RoHS (EU 2011/65/EU and China RoHS).

What is the protection class of the Siemens 3RW3037-1BB14?

The Siemens 3RW3037-1BB14 has an IP20 protection class.

What is the typical delivery time and stock availability for the Siemens 3RW3037-1BB14?

Rayon Automation keeps the Siemens 3RW3037-1BB14 in stock. We test items before shipment, provide serial number photos, packaging shots and test videos, and support global fast delivery for industrial automation spare parts.

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Siemens 3RW3037-1BB14

Q: Can the Siemens 3RW3037-1BB14 be used in a 24V DC control circuit?

No. The rated control supply voltage range of the Siemens 3RW3037-1BB14 is 110 V to 230 V AC/DC. It cannot be used in a 24 V AC/DC control circuit.

Q: Why does the 3RW3037-1BB14 have only two-phase thyristors for control, and will this affect the starting of a three-phase motor?

No. During the starting process, two phases are phase-controlled through thyristors while the third phase is directly conducted. This still enables a balanced and smooth rise of the three-phase current, fully meeting the starting requirements of standard three-phase asynchronous motors such as pumps, fans and conveyors.

Rayon Automation has long held the original stock of Siemens 3RW3037-1BB14, which is a high-performance compact soft starter in the Siemens SIRIUS 3RW30 series. It adopts the S2 housing size design. It is suitable for the soft starting of three-phase asynchronous motors under an operating voltage environment of 200-480V, with a rated working current of up to 72A (corresponding to a motor power of approximately 37kW at 400V), and the control power supply voltage is 110-230V AC/DC.

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Product Description

As a supplier, Rayon Automation's high-quality Siemens 3RW3037-1BB14 effectively reduces the starting impact current and mechanical shock by smoothly regulating the motor starting voltage, significantly prolonging the service life of the transmission system. The equipment is strictly verified by the testing bench before leaving the warehouse, ensuring that we can provide global customers with fast and stable spare parts support.

Core Features

The Siemens 3RW3037-1BB14 is specifically designed for smooth motor starting in industrial applications. It employs two-phase control technology, ensuring a lightweight design while enabling smooth control of three-phase motor starting processes. The front panel of the module integrates potentiometer knobs, allowing on-site engineers to quickly set the starting voltage (Ramp Voltage) and ramp-up time (Ramp Time), eliminating the need for complex software debugging steps. An internal bypass contact system (Bypass Contact System) automatically engages after the start, reducing power consumption and heat generation.

Technical Specifications

Parameter	Specification
Product Series	Siemens SIRIUS 3RW30
Structural Housing Size	Size S2
Main Circuit Operating Voltage	3AC 200 V – 480 V (−15% / +10%), 50/60 Hz
Rated Operating Current (Ie)	72 A (at 40°C ambient temperature)
Rated Power (400 V AC)	37 kW (standard three-phase asynchronous motor)
Control Supply Voltage	110 V – 230 V AC/DC
Terminal Type	Screw Terminals
Bypass System	Built-in bypass system with integrated bypass contacts
Protection Class	IP20

Typical application scenarios

The Siemens 3RW3037-1BB14 is used in basic motor drive scenarios that do not require soft stop (Soft Stop) or high-order torque control. Typical equipment includes centrifugal pumps, industrial ventilators and fans, small belt conveyors, screw feeders, mixers, and small compressor systems.

Product features

1. Integrated bypass contactor, automatically switches to bypass operation after startup is completed, greatly reducing the heat generated by the equipment itself, without the need for an additional bypass contactor.
2. The startup time (0-20 seconds) and starting voltage (40%-100%) can be directly adjusted through the front screw knob, making on-site startup and debugging extremely convenient.
3. In terms of design, it is perfectly matched with the 3RV series circuit breakers and 3RT series contactors of the SIRIUS family, and can be quickly assembled into a motor starter combination directly through connection modules.
4. It reduces the mechanical stress of belts, gearboxes and couplings, and prevents the common water hammer effect in the water pump system.

Quality certification

The Siemens 3RW3037-1BB14, as a standard soft starter within the SIRIUS industrial control product line of Siemens, complies with the core compliance and safety certification standards of the major industrial markets worldwide.

CE Certification (European Conformity Mark):

Compliant with the European Low Voltage Directive (LVD 2014/35/EU) and the Electromagnetic Compatibility Directive (EMC Directive 2014/30/EU).

UL Certification (American Safety Certification):

Certified to UL 508 Industrial Control Equipment Standard (File Number: E143000 or related Siemens industrial control file).

CSA Certification (Canadian Standards Association):

Compliant with Canadian C22.2 No.14 Industrial Control Equipment Standard.

EC/EN 60947-4-2:

Low-voltage switchgear and controlgear - AC semiconductor motor controllers and soft starters.

RoHS compliance:

Compliant with the EU 2011/65/EU and China RoHS restrictions on hazardous substances.

Why choose us?

At Rayon Automation, we have a wide range of inventory models. New and existing customers need to inform us of the models. Whether they are discontinued or in high demand, we have a rich inventory. At the same time, we help customers check the power supply compatibility on-site to avoid equipment damage caused by incorrect wiring. Before shipping all products, we will take photos of the unique serial numbers (Serial Number) and send real-time packaging photos with personalized labels and test videos to customers.

FAQ

Can the Siemens 3RW3037-1BB14 be used in a 24V DC control circuit?

No. The rated voltage range is 110V to 230V AC/DC. If your field control circuit is 24V AC/DC.

Is an external bypass contactor (Bypass Contactor) required for the soft starter?

No. The Siemens 3RW3037-1BB14 has an integrated bypass contactor system inside. When the motor reaches full speed after completing the ramp start, the internal bypass contact will automatically draw the main current of the takeover.

Why does the 3RW3037-1BB14 have only two-phase thyristors for control, and will this affect the starting of a three-phase motor?

No. During the starting process, the two phases are phase controlled through thyristors, and the third phase is directly conducted. This still enables the balanced and smooth rise of the three-phase current, fully meeting the starting requirements of the vast majority of standard three-phase asynchronous motors such as water pumps, fans, and conveyors.

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