Wireway Measurement Selection for Mixed Three-Phase Conversion
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Solution Overview
Problem
There is a demand for accurately measuring wireway electricity related values in a single-phase circuit where three-phase power is converted into single-phase power and distributed, particularly to ensure safety and efficiency in electrical systems.
Innovation Solution
A measurement apparatus and method that includes multiple measurement units and a selection processor to accurately measure wireway electricity related values based on different connection states of three-phase and single-phase AC power sources, calculating leakage current components using specific equations and phase angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a three-phase AC power source is converted into single-phase AC power for distribution, then the power can be used in single-phase circuits, but the measurement of wireway electricity related values becomes inaccurate
Solution Approach 1:
The measurement apparatus is divided into multiple measurement units (first measurement unit for star-connected sources, second measurement unit for star-connected sources, third measurement unit for delta-connected sources, fourth measurement unit for delta-connected sources), each configured to measure wireway electricity related values according to different connection configurations. The selection processor segments the measurement task by automatically selecting the appropriate measurement unit based on the detected power source connection state, thereby maintaining measurement accuracy across various power distribution scenarios.
2Measurement precision
If multiple measurement units are provided for different connection states, then measurement accuracy is improved, but device complexity increases
Solution Approach 1:
The measurement apparatus employs a universal selection processor that can identify different power source connection states (star-connected or delta-connected, with or without neutral line) and automatically select the appropriate measurement unit. This multi-functional approach allows a single measurement apparatus to handle various connection configurations accurately without requiring manual configuration or multiple independent devices, thereby improving measurement precision while controlling device complexity through intelligent automation.
Data Source
AI summary
A measurement apparatus includes a measurement unit having two or more of a first measurement unit configured to measure an electricity related value of a wireway branched from a wireway to be measured to which a star-connected three-phase AC power source is connected, a second measurement unit configured to measure an electricity related value of a wireway branched from a wireway to be measured to which a star-connected three-phase AC power source is connected, a third measurement unit configured to measure an electricity related value of a wireway branched from a wireway to be measured to which a delta-connected three-phase AC power source is connected, and a fourth measurement unit configured to measure an electricity related value of a wireway branched from a wireway to be measured to which a delta-connected three-phase AC power source is connected, and a selection processor configured to select any one of the measurement units.