ALSTOM AB121

Description

Product Description

The ALSTOM AB121 is a specialized accessory or mounting base designed for Alstom’s range of circuit breakers, contactors, or protection relays. This model functions as a critical hardware interface, providing a standardized and secure method for installing the primary device into a control panel or switchboard. The primary role of the ALSTOM AB121 is to offer a robust mechanical mounting platform while also often incorporating essential electrical connections such as auxiliary contacts, wiring terminals, or even shunt trip mechanisms. Utilizing the correct AB121 base ensures proper alignment, safety, and electrical functionality of the installed component. For panel builders and maintenance technicians, the genuine ALSTOM AB121 is a key part of ensuring a reliable and compliant installation.

Product Parameters

• Manufacturer / Brand: Alstom

• Product Type: Mounting Base / Adapter Base / Accessory Base

• Model: AB121

• Compatible Devices: Designed to be used with a specific series of Alstom circuit breakers, contactors, or motor starters (e.g., for a particular frame size or model family).

• Mounting Method: Typically designed for screw mounting onto a panel backplate or for attachment to a DIN-rail, providing a stable foundation.

• Integrated Features: May include built-in auxiliary contacts (normally open and/or normally closed) to provide signaling of the main device’s status, and may also feature terminals for connecting control wiring.

• Connection Interface: Provides the plug-in or bolt-on connection points that mate with the main device, ensuring correct electrical contact for power and control circuits.

• Material: Constructed from durable, flame-retardant thermoplastic or thermoset material with metal current-carrying parts.

• Safety Standards: Compliant with relevant international standards for electrical accessories and panel components.

Advantages and Features

• Guaranteed Compatibility and Fit: The ALSTOM AB121 is engineered to perfectly match the dimensions and electrical interface of its intended Alstom device, eliminating installation guesswork.

• Simplified Installation and Maintenance: Allows for quick “plug-and-play” mounting of the primary device, facilitating faster panel assembly and easier device replacement for maintenance.

• Enhanced Functionality: By integrating auxiliary contacts, the base adds valuable signaling capability to a basic device, enabling remote status indication and interlocking without requiring separate components.

• Improved Safety: Provides a secure and stable mechanical mounting, reducing the risk of accidental disconnection or movement, and often includes features for proper grounding.

• Organized Wiring: Terminal blocks on the base help organize and centralize control wiring, leading to a cleaner and more professional panel layout.

• Time and Cost Efficiency: Reduces the time required for wiring and mounting compared to custom solutions, lowering overall installation labor costs.

Application Cases in Key Fields

• Industrial Motor Control Centers (MCCs): Used as the mounting and interface base for Alstom contactors and overload relays in motor starter assemblies, providing auxiliary feedback to the PLC.

• Power Distribution Panels: Serves as the fixed base for molded case circuit breakers (MCCBs) in distribution boards, allowing the breaker to be easily snapped in and out while the wiring remains connected to the base.

• Machine Control Panels: Integrated into the control cabinets of packaging machines, conveyors, and presses to mount and interface power control components.

• Railway Rolling Stock: Employed in vehicle control panels to mount and connect critical protection and power switching devices, ensuring a vibration-resistant installation.

Comparison with Competing Products

Competing products include generic or universal mounting bases from other manufacturers like Schneider Electric (for TeSys contactors), Siemens (for Sirius devices), or ABB. While these may offer similar mechanical functionality, the ALSTOM AB121 is specifically tailored for Alstom devices. A generic base might physically fit but could lack the precise connector alignment, proper auxiliary contact actuation, or the correct terminal markings. The key advantage of the AB121 is its OEM assurance of perfect electrical and mechanical compatibility, safety, and performance, which is crucial for maintaining system integrity, warranty, and compliance with original specifications.

Selection Suggestions and Precautions

• Verify Exact Compatibility: This is the most critical step. The AB121 base is designed for a specific device model or frame size. Confirm the compatibility list from Alstom’s catalog to ensure it matches your specific contactor, breaker, or relay.

• Identify Required Features: Determine if you need a base with auxiliary contacts (and how many NO/NC), a shunt trip connector, or other options. The ALSTOM AB121 may come in several variants with different integrated features.

• Check Electrical Ratings: Ensure that the current-carrying capacity and voltage rating of the base’s terminals and integrated contacts meet or exceed the requirements of your application.

• Plan Panel Layout: Account for the physical dimensions of the base itself in your panel layout, as it may be larger than the footprint of the device alone.

• Follow Torque Specifications: When wiring the terminals on the ALSTOM AB121, adhere to the manufacturer’s specified tightening torques to ensure reliable connections and prevent damage.

• Source Genuine Parts: To guarantee fit, function, and safety, purchase the ALSTOM AB121 from authorized Alstom/Hitachi Energy distributors or reputable automation suppliers.

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