Siemens SIRIUS 3RT2346-1AP00-4AA0 Power Contactor AC-3, 95A, 4-Pole, 230V AC, S3 Size Original Brand New

Overview

The Siemens SIRIUS 3RT2346-1AP00-4AA0 power contactor is engineered for high performance and durability in industrial environments. As part of the SIRIUS modular system, it offers seamless integration and expands possibilities for building efficient and reliable control systems. This 4-pole contactor is particularly suited for applications requiring the switching of motor loads (AC-3) as well as non-inductive or weakly inductive loads (AC-1). Its compact design, coupled with versatile connection methods and comprehensive protection features, makes it a preferred choice for machinery and plant engineering.

Benefit

• Reliable Performance: Built to Siemens’ rigorous quality standards, ensuring long-term operational stability and reduced downtime.
• Versatile Application: Ideal for a wide range of switching tasks, from motor control (AC-3) to general load switching (AC-1), including disconnecting loads or power generation plants from the grid and transfer switching.
• Integrated Auxiliary Contacts: The built-in 1 NO + 1 NC contacts provide immediate feedback and control options, simplifying wiring and reducing the need for external components.
• Robust Connection: Secure screw terminals with box terminals (for 3RT233 and 3RT234) offer reliable electrical connections, capable of direct connection to connecting bars with cable lugs (for 3RT234 when box terminal is removed).
• Enhanced Protection: Designed with provisions for short-circuit, overload, and overvoltage protection for main, auxiliary, and control circuits, ensuring the safety and longevity of your equipment.
• Electromagnetic Compatibility (EMC): Fulfills requirements for environment category A, ensuring reliable operation even in challenging electrical environments.
• Flexible Expansion: Compatible with a range of SIRIUS accessories, including additional auxiliary switches and surge suppressors, allowing for customized system configurations.
• High Contact Reliability: Auxiliary contacts are optimized for low voltages (≤ 110 V) and currents (≤ 100 mA), making them suitable for solid-state circuits.

Function

• Switching of Loads: The primary function is to switch electrical loads, particularly 3-phase AC motors (AC-3) and non-inductive or weakly inductive loads (AC-1).
• Motor Control: Acts as a key component in motor starter circuits, enabling remote and automatic control of motor operation.
• Overload Protection Integration: Designed for direct mounting with Siemens 3RU2 thermal overload relays or 3RB3 electronic overload relays, providing comprehensive motor protection against overcurrents.
• Circuit Isolation: Capable of disconnecting circuits for maintenance or safety purposes.
• Signaling and Interlocking: Integrated auxiliary contacts provide status indication and facilitate interlocking functions within control circuits.
• Coil Damping (Optional): Can be retrofitted with RC elements, varistors, diodes, or diode assemblies for damping opening surges in the coil, protecting sensitive control components.

Technical Details and Protection:

• Standards: Complies with international standards IEC 60947-1, IEC 60947-4-1, and IEC 60947-5-1 (for auxiliary switches), ensuring global applicability and safety.
• Short-Circuit and Overload Protection:
  • Main Connections: Protection details available in the technical product data sheet and configuration manuals for load feeders (Digital and standard).
  • Auxiliary Connections: Specific protection guidelines found in the technical product data sheet.
  • Control Supply Voltage: Requires consideration of relevant standards for control panel configuration, suitable power supply selection (with current-limiting function), and appropriate protection devices like miniature or circuit breakers.
• Overvoltage Protection: The 3RT23 contactors can be equipped with separately ordered surge suppressors (RC elements, varistors, diodes, or diode assemblies) to dampen opening surges in the coil. Note: Damping increases break, opening, and closing delay times.
• Connection Methods:
  • Main Circuit (3RT234): Screw terminals with box terminal, direct connection to connecting bar possible with cable lugs when box terminal is removed.
  • Auxiliary and Control Circuit: Screw terminals.
• Electromagnetic Compatibility: Meets requirements for environment category A. For use with frequency converters, specific configuration notes in the Equipment Manual must be observed.
• Contact Reliability of Auxiliary Contacts: High reliability for switching low voltages (≤ 110 V) and currents (≤ 100 mA), suitable for solid-state circuits (≥ 1 mA at ≥ 17 V).

Operating Mechanism:

• Conventional AC Operating Mechanism: Operates with a 230 V AC, 50 Hz control voltage, controlled via terminals A1 – A2.
• Solid-State Operating Mechanism (Optional/Other Models): While this specific model uses a conventional AC mechanism, the 3RT23 series also includes versions with wide-range solid-state operating mechanisms for universal AC or DC actuation.

Maintenance and Expandability:

• Solenoid Coil Replacement: The solenoid coil of the 3RT234 contactor is replaceable.
• Auxiliary Contact Installation: Basic units are supplied with integrated auxiliary contacts (1 NO + 1 NC for 3RT232 to 3RT234). Additional auxiliary switches can be easily mounted to expand the control capabilities, adhering to permissible configurations.
• Accessories and Spare Parts: A wide range of accessories and spare parts are available for SIRIUS 3RT2 contactors and 3RH2 contactor relays.

Application

The Siemens 3RT2346-1AP00-4AA0 power contactor is perfectly suited for a variety of industrial applications, including:

• Motor Control: Starting, stopping, and reversing AC motors in pumps, fans, conveyors, and machine tools.
• HVAC Systems: Control of compressors, blowers, and heating elements.
• Lighting Control: Switching of large lighting circuits.
• Capacitor Switching: For power factor correction applications.
• Resistive Loads: Switching of heating elements and other resistive loads.
• Power Distribution: Disconnecting loads or power generation plants from the grid.
• Transfer Switching: In backup power systems or multi-source configurations.

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