Compact Power Meter Terminal Bus Bar Guide Integration
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Solution Overview
Problem
Existing electrical power meters lack efficient and secure mechanisms for connecting and monitoring multiple line conductors in power distribution systems, which can lead to inaccuracies and tampering issues.
Innovation Solution
The design incorporates current transformers with bus bars and guides, such as ribs with raised stops, to securely connect and position lugs on line conductors, ensuring accurate current sensing and preventing tampering by using a snap-together case and integral fasteners, along with an optical switch for secure adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional connection mechanisms are used for line conductors, then the meter structure remains simple, but connection security and anti-tampering capability deteriorate
Solution Approach 1:
The patent merges the terminal structure with the meter case by integrating terminals directly into the case body, eliminating separate connection components. The guide ribs are also integrated into the case, creating a unified structure that enhances connection security while avoiding additional parts that would increase complexity.
Solution Approach 2:
The connection mechanism is segmented into distinct functional elements: guide ribs for positioning, terminals for electrical connection, and integrated fastening features. This segmentation allows each element to perform its specific function efficiently while maintaining overall structural simplicity through the integration approach.
2Measurement precision
If multiple line conductors are connected without precise positioning, then assembly is easier, but measurement accuracy deteriorates
Solution Approach 1:
The guide ribs are pre-formed as integral parts of the meter case, creating predetermined paths that automatically position the line conductors and lugs correctly during assembly. This preliminary positioning action ensures accurate alignment without requiring complex adjustment procedures during installation.
Solution Approach 2:
The guide ribs act as intermediary elements between the terminals and the line conductors, facilitating precise positioning. The ribs provide a mechanical interface that guides the conductors into the correct position, mediating between the rigid terminal structure and the flexible conductor installation process.
3Ease of operation
If adjustment features are made accessible for ease of operation, then ease of operation improves, but vulnerability to tampering increases
Solution Approach 1:
The optical adjustment switch enables dynamic configuration of the meter without physical access to internal components. Adjustments can be made remotely or through sealed interfaces, allowing the system to change its operational parameters while maintaining physical security. The case remains sealed except for necessary connections, preventing tampering while allowing legitimate adjustments.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration enhances the accuracy of power monitoring, reduces tampering risks, and simplifies assembly while maintaining a compact and secure power meter design.
Implementation Method 1
a plurality of current transformers within the meter case for sensing the electrical current in a plurality of line conductors
Data Source
Figure 1
Figure 2A~2C
Figure 3
AI summary
An electrical power meter (10) for monitoring electrical power supplied to a load comprises a meter case (11), a plurality of current transformers (32a, 32b, 32c) within the meter case for sensing the electrical current in a plurality of line conductors of a power distribution system, and a plurality of pairs of terminals (36, 39 and 37, 40 and 38, 41) on the meter case for connecting the meter to the line conductors. The terminals of each pair are located on opposite sides of one of the current transformers, and a current transformer bus bar (33-35) connects the two terminals and extends through one of the current transformers. A plurality of guides (81-84) adjacent selected pairs of the terminals position lugs (55, 56, 58, 59) connecting line conductors to the selected pairs of terminals.