Siemens 3RT2517-1AB00 SIRIUS 3RT25 Industrial Application Contactor 24VAC 12A 2NO+2NC

The Siemens 3RT2517-1AB00 SIRIUS 3RT25 Industrial Application Contactor is a robust and reliable solution for demanding industrial environments, offering superior control and safety for electrical circuits. This 24VAC contactor boasts a 12A current rating and a versatile configuration of 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts, making it ideal for a wide range of motor control and switching applications. Its compact design and advanced SIRIUS 3RT25 technology ensure efficient operation and long-term performance.

Product Specifications

| Feature                 | Specification                                     |

| :---------------------- | :------------------------------------------------ |

| Manufacturer            | Siemens                                           |

| Product Series          | SIRIUS 3RT25                                      |

| Model Number            | 3RT2517-1AB00                                     |

| Coil Voltage            | 24 VAC                                            |

| Rated Operational Current | 12A (AC-3, 400V)                                  |

| Auxiliary Contacts      | 2 NO + 2 NC                                       |

| Mounting Type           | DIN rail or screw mounting                        |

| Protection Class        | IP20                                              |

| Ambient Temperature     | -25 to +60 °C                                     |

| Connection Type         | Spring-loaded terminals                           |

| Insulation Voltage      | 690V                                              |

| Breaking Capacity       | AC-3: 10Ie, AC-1: 10Ie                            |

Core Features & Market Positioning

The Siemens 3RT2517-1AB00 distinguishes itself through its inherent reliability and long operational lifespan, hallmarks of the SIRIUS industrial controls portfolio. Its spring-loaded terminal technology simplifies wiring and ensures vibration-resistant connections, a critical advantage in harsh industrial settings where mechanical stress is common. The integrated auxiliary contacts offer immediate flexibility for control logic and signaling without the need for additional components, reducing system complexity and cost. This makes the 3RT2517-1AB00 a preferred choice for engineers seeking dependable and space-efficient motor control solutions that meet stringent safety and performance standards. Its market positioning is defined by its balance of advanced features, robust construction, and competitive pricing for high-demand applications.

Key Application Scenarios

The Siemens 3RT2517-1AB00 SIRIUS 3RT25 contactor is exceptionally suited for a diverse array of industrial applications. It excels in direct-on-line motor starting for pumps, fans, and compressors in manufacturing plants and HVAC systems. Its adaptable auxiliary contact configuration is invaluable for implementing control circuits, interlocking mechanisms, and status feedback in automated production lines. Furthermore, this contactor finds utility in power distribution panels for load shedding and switching of lighting or heating circuits where reliable operation is paramount. The 24VAC coil voltage also makes it compatible with many control voltage systems prevalent in industrial automation.

Practical System Integration Guidance

Integrating the Siemens 3RT2517-1AB00 into existing systems is streamlined due to its modular design and user-friendly spring-loaded terminals. For motor control, connect the main power lines to the power terminals (L1, L2, L3) and the motor to the output terminals (T1, T2, T3). The control circuit connects to the A1 and A2 coil terminals for energization. Utilize the NO (13, 14, 23, 24) and NC (11, 12, 21, 22) auxiliary contacts for feedback signals, interlocking, or integration into PLC input modules. Ensure compliance with local electrical codes and wiring diagrams. Proper grounding of the unit is essential for safety.

Operation and Risk Mitigation

Safe operation of the Siemens 3RT2517-1AB00 requires adherence to electrical safety standards and proper installation. Always de-energize circuits before performing any wiring or maintenance. The contactor's IP20 protection rating means it must be installed in an enclosure to prevent contact with live parts. Overload protection, typically via a Siemens SIRIUS overload relay, should be coordinated with the contactor to prevent motor damage from excessive current. In case of coil failure or contact welding, the system may not operate as expected; regular inspection and testing are recommended to mitigate these risks and ensure continued reliability.

Scalability & Long-Term Value

The SIRIUS 3RT25 series, including the 3RT2517-1AB00, offers excellent scalability and long-term value within an industrial automation infrastructure. Its compatibility with other SIRIUS components, such as overload relays and circuit breakers, allows for the creation of integrated motor control circuits and efficient system expansions. The standardized footprint and connection interfaces simplify upgrades or replacements. For industries moving towards Industry 4.0, these contactors can be integrated into smart systems with communication modules, providing data on operational status and enabling predictive maintenance, thereby enhancing overall plant efficiency and reducing downtime.

Frequently Asked Questions

What is the primary function of the Siemens 3RT2517-1AB00?

This contactor serves as an electrically controlled switch for industrial applications. It is designed to switch electrical power circuits on and off, primarily for controlling electric motors.

It provides a safe and reliable method for remote operation of machinery. Its robust design ensures it can handle the demands of continuous industrial use.

The specific configuration with 2 NO and 2 NC auxiliary contacts also allows for sophisticated control logic and signaling within a larger automation system.

What are the key technical specifications for the Siemens 3RT2517-1AB00?

The Siemens 3RT2517-1AB00 operates with a 24VAC coil voltage. It has a rated operational current of 12A under AC-3 conditions.

It features 2 normally open (NO) and 2 normally closed (NC) auxiliary contacts for flexible integration into control circuits. The contactor is designed for DIN rail or screw mounting.

Its insulation voltage is rated at 690V, and it offers an IP20 protection class, indicating it requires enclosure protection.

How do I wire the Siemens 3RT2517-1AB00 for motor control?

Connect the incoming power supply to the main terminals (L1, L2, L3) and the output terminals (T1, T2, T3) to the electric motor. Ensure the power supply matches the contactor's specifications.

Energize the coil by connecting the control voltage (24VAC) to the A1 and A2 terminals. Use a suitable circuit breaker or fuse for overload protection upstream.

The auxiliary contacts (e.g., 13/14 for NO, 11/12 for NC) can be wired into your control logic for signaling or interlocking functions with other devices.

What are the advantages of using the SIRIUS 3RT25 series contactors?

The SIRIUS 3RT25 series offers high reliability and a long operational lifespan, crucial for industrial uptime. Its compact design saves valuable panel space.

Spring-loaded terminals ensure secure, vibration-resistant connections, reducing maintenance and potential failure points. This simplifies installation and increases safety.

The integrated auxiliary contacts provide immediate flexibility, eliminating the need for additional add-on modules for many common control tasks, thus reducing costs.

What types of applications is the Siemens 3RT2517-1AB00 suitable for?

This contactor is ideal for direct-on-line motor starting in pumps, fans, and compressors. It's a core component in various manufacturing and HVAC systems.

Its auxiliary contacts make it well-suited for interlocking systems and status signaling in automated production lines. It can also be used for load switching.

It's also applicable in power distribution for controlled switching of circuits, lighting, and heating elements where dependable operation is critical.

Can the Siemens 3RT2517-1AB00 be used with PLC systems?

Yes, the Siemens 3RT2517-1AB00 is highly compatible with PLC systems. Its auxiliary contacts can be easily wired as inputs to a PLC for status monitoring.

The coil can be controlled by a PLC output module, allowing for remote and automated switching of connected loads. Ensure the PLC output voltage matches the contactor's coil voltage.

Proper signal conditioning and understanding of the PLC's output capabilities are essential for seamless integration and reliable control.

What safety considerations are important when installing this contactor?

Always ensure the power supply is de-energized before performing any wiring or maintenance to prevent electric shock. The IP20 rating means the contactor must be installed within a suitable enclosure.

Proper grounding of the contactor and the entire system is mandatory for safety. Follow all local electrical codes and regulations during installation.

It is recommended to use appropriate overload protection, such as a SIRIUS overload relay, to prevent damage from overcurrent conditions.

What does "2NO+2NC auxiliary contacts" mean on this contactor?

"2NO" means there are two sets of contacts that are normally open. These contacts close when the main coil of the contactor is energized.

"2NC" means there are two sets of contacts that are normally closed. These contacts open when the main coil of the contactor is energized.

These auxiliary contacts are used for signaling, interlocking, or to provide feedback to control systems about the state of the main power contacts.

How does the spring-loaded terminal technology benefit users?

Spring-loaded terminals provide a secure and vibration-resistant connection, which is crucial in industrial environments where mechanical stress can loosen traditional screw terminals. This reduces the risk of loose connections and subsequent equipment failure.

Installation is faster and simpler, as wires can be inserted directly into the terminals without the need for torquing screws. This can significantly speed up panel assembly and maintenance.

The consistent contact force provided by spring terminals ensures reliable electrical performance over the long term, contributing to the overall dependability of the system.

Is the Siemens 3RT2517-1AB00 compatible with other Siemens SIRIUS components?

Yes, the Siemens 3RT2517-1AB00 is part of the broader SIRIUS modular system. It is designed to be seamlessly integrated with other SIRIUS devices like overload relays, fuses, and communication modules.

This compatibility allows for the creation of comprehensive and standardized motor control solutions, simplifying design and installation. It also ensures consistent performance and safety features across the system.

The modular nature of the SIRIUS line provides excellent scalability, allowing for easy expansion or modification of control systems as industrial needs evolve.