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Abstract

A 3-phase group modular metering system, with a 3-phase four main cross bus A, B, C and N configuration is provided to distribute 3-phase four wire power to a single-phase three main cross bus A1, B1 and N1 configuration as single-phase three wire power. The system comprises a 3-phase main connection module, at least one or more single-phase in to single-phase out metering module stacks, a number of 3-phase metering module stacks ranging from as few as none to as many as a plurality and a connection joint. The connection joint is disposed between a last 3-phase module and the at least one or more single-phase in to single-phase out metering module stacks to derive the 3-phase four main cross bus A, B, C and N configuration into the single-phase three main cross bus of A1, B1 and N1 configuration. The connection joint distributes power in single-phase through the single-phase three main cross bus of A1, B1 and N1 configuration by deriving (A, B, N) or (A, C, N) or (B, C, N) combination of a 3-phase bus and forming single-phase connection interfaces.

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