Overview
The Siemens 3RA2921-1B is a high-quality link module from the SIRIUS family, designed to provide the essential electrical and mechanical connection for building compact and efficient load feeders. This specific module facilitates the quick and reliable assembly of devices with screw terminals, linking motor starter protectors/circuit breakers (3RV2.1/3RV2.2) with contactors (3RT2.2) primarily for DC operation, soft starters (3RW3), or solid-state contactors (3RF34). Its multi-unit packaging makes it an ideal choice for volume installations and efficient inventory management.
Technical Specifications & Function
- Product Number: 3RA2921-1B
- Product Brand Name: SIRIUS
- Product Type Designation: 3RA29
- Connection Type: Screw terminal (electrical and mechanical)
- Compatible Components:
- Motor Starter Protectors/Circuit Breakers: SIRIUS 3RV2.1 and 3RV2.2
- Contactors: SIRIUS 3RT2.2 (Specifically for DC operation)
- Soft Starters: SIRIUS 3RW3
- Solid-State Contactors: SIRIUS 3RF34
- Function: Creates a robust, pre-engineered connection between components, simplifying wiring, reducing assembly time, and minimizing the potential for wiring errors in industrial control panels.
- Size Compatibility: Suitable for circuit breakers of size S00 and S0, and contactors of size S0.
- Packaging: Multi-unit packaging (for bulk/efficiency).
Key Benefit
- Reduced Wiring Effort: The pre-fabricated link module replaces individual wiring between the motor starter protector and the contactor, significantly cutting down on assembly and installation time.
- High Reliability: Ensures secure electrical and mechanical continuity, minimizing the risk of faults and improving system uptime.
- Space-Saving Design: Allows for extremely compact load feeder assemblies, optimizing panel space.
- Standardized Assembly: Enables fast, error-free assembly of load feeders, including direct-on-line and reversing starters.
- SIRIUS System Integration: Seamlessly integrates with the vast range of Siemens SIRIUS industrial controls.
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