Description
The Siemens 3RW5534-6HA04 is a SIRIUS 3RW55 series high-performance soft starter designed for reliable and smooth starting and stopping of three-phase motors up to 55 kW at 400 V (or 110 kW in inside-delta connection). Operating on a 200–480 V AC main voltage and 24 V AC/DC control voltage, it provides advanced motor protection and flexible parameterization for demanding industrial applications.
This device features an integrated bypass contact system, torque control, DC braking, and pump ramp-down functions for optimized starting and stopping profiles. It includes full motor protection (electronic + thermistor), condition monitoring, and automatic parameterization to ensure maximum operational safety and performance efficiency.
The 3RW5534-6HA04 supports PROFINET, PROFIBUS, EtherNet/IP, and Modbus (TCP/RTU) communications via optional modules, making it easy to integrate into modern automation systems. With HMI high-feature support, data logging, trace functions, and firmware update capability, this soft starter provides powerful diagnostics and configuration flexibility.
Key Technical Features:
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Series: Siemens SIRIUS 3RW55
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Type: High-Feature Soft Starter
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Main Voltage: 200–480 V AC
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Control Voltage: 24 V AC/DC
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Rated Operational Current: 113 A (196 A inside-delta)
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Motor Power: 55 kW @ 400 V (110 kW inside-delta)
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Integrated Bypass: Yes
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Ramp Time: 0–360 s (adjustable)
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Torque Control: Yes
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Motor Protection: Full motor protection with thermistor and electronic overload
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Communication Options: PROFINET, PROFIBUS, EtherNet/IP, Modbus TCP/RTU
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Degree of Protection: IP00 (IP20 with cover)
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Dimensions (H×W×D): 306 × 185 × 203 mm
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Weight: 7.8 kg
Special Features:
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Automatic parameterization and setup wizards
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Condition monitoring and event logging
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DC braking, pump ramp-down, and torque limitation
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Compatible with Siemens 3VA circuit breakers and gG or R-type fuses
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Certified for CE, UL, CSA, ATEX, and IECEx standards
The 3RW5534-6HA04 SIRIUS Soft Starter ensures energy-efficient, low-wear motor starting, ideal for pumps, compressors, conveyors, and HVAC systems where precision, communication capability, and reliability are critical.


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