3-phase to single-phase connection joint for modular metering bus
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Solution Overview
Problem
Current 3-phase group metering systems require 3-phase in and single-phase out metering modules, which are more expensive than single-phase in to single-phase out modules, necessitating a need for a mechanism to distribute 3-phase four wire power as single-phase three wire power efficiently.
Innovation Solution
A 3-phase group modular metering system with connection joints that interface a 3-phase four main cross bus configuration to a single-phase three main cross bus configuration, allowing for the distribution of power through single-phase in to single-phase out metering modules, using connection joints like 3-phase to AB, AC, and BC single-phase connection joints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If 3-phase in and single-phase out metering modules are used, then the system can distribute 3-phase power to single-phase loads, but the system cost increases
Solution Approach 1:
The system divides the power distribution function into two separate modules: a 3-phase input module that receives 3-phase power and converts it to single-phase power, and standard single-phase metering modules that distribute the power. This segmentation allows the use of cheaper single-phase modules for the majority of distribution points while only requiring one 3-phase to single-phase conversion module.
Solution Approach 2:
The patent introduces a 3-phase to single-phase connection joint as an intermediary device that bridges the 3-phase main bus and the single-phase metering modules. This connection joint converts the 3-phase input into single-phase output, enabling standard single-phase modules to be used in a 3-phase system without requiring expensive 3-phase capable modules at each distribution point.
2Adaptability or versatility
If all group metering equipment has a 3-phase connection interface, then the system can handle 3-phase power input, but the complexity and cost of each module increases
Solution Approach 1:
The system segregates the 3-phase interface requirement to a single connection joint device, while all downstream metering modules maintain simple single-phase interfaces. This segmentation of interface complexity allows each module to be designed for its specific function without requiring all modules to handle 3-phase connections.
Solution Approach 2:
The connection joint serves multiple functions: it provides the 3-phase to single-phase conversion, acts as the interface between 3-phase and single-phase systems, and enables the use of standard single-phase modules in a 3-phase powered system. This multi-functionality consolidates the complexity into a single device rather than requiring it in all modules.
Data Source
AI summary
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.