Single Line Diagram for 430V 3-Phase Power Distribution System

This electrical single line diagram (SLD) depicts a 430V, 150A, 3-phase 4-wire aluminum busbar power distribution system with redundant incoming supplies. This diagram shows a primary incoming supply (Incoming Supply-1) and a secondary supply (Incoming Supply-2) connected through a stabilizer with automatic changeover capability. The system features 63A FP MCBs for protection and 63A FP on-load change switches for supply selection. Distribution branches include multiple circuit breakers feeding various loads labeled as 0/G-1NO, 0/G-2NOS, and 0/G-4NOS, suggesting control for outgoing groups of equipment. The system incorporates earth connections and appears to have DC input integration, possibly for control circuits. The aluminum busbars are specified as 25 x 6 mm in cross-section, providing the main power distribution pathway. The diagram employs standard electrical symbols for MCBs, contactors, and isolators conforming to IEC standards, with a clear hierarchical arrangement from incoming supply to load endpoints.