Siemens 3RV2928-1K Phase Barrier

Siemens Sirius 3RV2 Phase Barrier, model 3RV2928-1K, is a phase barrier accessory for the Sirius 3RV2 family of motor‑protection devices. Designed for 3RV2 sizes S00/S0, it installs between phase terminals to provide isolated spacing within a control panel. The “Phase barriers Increased air” variant indicates enhanced electrical clearance, helping meet tighter installation requirements in compact enclosures. This part is cataloged by Siemens under mlfb 3RV2928-1K and is listed by Siemens and distributors as a compatible accessory for 3RV2 motor protection assemblies. Used in motor protection installations where phase separation and safe maintenance access are required in panels with limited space, supporting reliable separation of live conductors in 3RV2‑based systems.