Siemens RV321G is a 30 A, 240 V, three-pole fusible bus plug for the XL-X busway system (3W configuration). This fusible-type bus plug is used in ITE/Siemens XL-X installations to provide protective switching in three‑phase power distribution. A direct substitute in the XL-X family is BRV3203G, which matches the RV321G’s 30 A, 240 V, three-pole specifications and is marketed as compatible with RV321G.
