Overview
The Siemens 3RT1955-5AT32 is a high-performance withdrawable drive designed specifically for use with Siemens SIRIUS 3RT105 and 3RT145 power contactors. This essential component facilitates seamless integration and maintenance, offering both standard and economy circuit operating mechanisms. Engineered for global applications, it operates on a wide voltage range of 575-600V, supporting both AC (50-60 Hz) and DC power supplies. The innovative spring-type terminals provide a fast, reliable, and vibration-proof connection, reducing installation time and ensuring long-term operational stability in demanding industrial environments.
Key Benefit
- Enhanced Serviceability: The withdrawable design allows for quick and easy replacement or maintenance of the contactor drive without needing to rewire the entire circuit, significantly reducing downtime.
- Flexible Application: Compatible with both AC and DC control voltages (575-600V), providing versatility for a wide range of industrial and commercial applications.
- Cost and Energy Efficiency: The "economy circuit" operating mechanism helps to reduce power consumption during holding, leading to lower energy costs over the product's lifetime.
- Vibration-Proof Connection: Spring-type terminals offer a secure and maintenance-free connection that is highly resistant to vibrations and shocks, ensuring reliable performance in harsh conditions.
- Simplified Installation: The innovative terminal design eliminates the need for special tools and simplifies wiring, making installation faster and more efficient.
Functionality
The 3RT1955-5AT32 drive provides the electromagnetic force required to operate the switching mechanism of the associated 3RT105 and 3RT145 contactors. It functions by:
- Receiving a control signal within its rated voltage range (575-600V AC/DC).
- Energizing the coil to pull the armature and close the contactor's main contacts.
- Maintaining the closed position through either a standard or economy circuit, depending on the application requirements. The economy circuit reduces the holding current after the initial pull-in, saving energy.
- Disconnecting the power to allow the armature to spring back and open the main contacts.
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