Siemens 3RT1975-5AM31 Changeover Mechanism 200-220V AC/DC Original Brand New

Overview

The Siemens 3RT1975-5AM31 is an essential changeover operating mechanism designed for use with the 3RT107 and 3RT147 series power contactors. This high-quality Siemens component enables the creation of a mechanically and electrically interlocked contactor assembly, crucial for changeover applications such as reversing starters or automatic transfer switches. Engineered for reliability, it supports both AC (50…60 Hz) and DC operation, accommodating a versatile control voltage range of 200 V to 220 V.

Key Features & Technical Specifications

• Product ID: 3RT1975-5AM31
• Compatibility: Designed for use with 3RT107 and 3RT147 Contactor sizes.
• Control Voltage: 200 … 220 V (AC $50/60\text{ Hz}$ / DC)
• Circuit Type: Features both Standard and Economy Circuit operation for reduced holding power and energy savings after the contactor has pulled in.
• Connection: Utilizes reliable Screw Terminals for secure and easy wiring installation.
• Function: Changeover/Interlocking function for two contactors.

Benefit

• Enhanced Safety: Provides necessary mechanical interlocking to prevent simultaneous energization of two contactors, crucial for safe reversing applications.
• Energy Efficiency: The integrated economy circuit significantly reduces power consumption (holding power) once the contactor is fully engaged, lowering operating costs.
• Versatile Operation: True AC/DC operation with a single component simplifies inventory and provides flexibility in system design.
• Simple Installation: Robust design with screw terminals ensures quick and secure mounting and wiring onto compatible contactors.
• Siemens Quality: Rely on the established quality and long-term reliability of a genuine Siemens industrial control product.

Function

The primary function of the 3RT1975-5AM31 is to serve as the activating coil and changeover interlock for a pair of 3RT107 or 3RT147 contactors. When wired between two compatible contactors, it ensures that:

1. The contactors are mechanically interlocked.
2. The contactors can be controlled by a single input voltage (200-220V AC or DC).
3. The control circuitry benefits from the built-in power-saving economy circuit.

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