Rogowski Cable Holder Layout for Accurate Busbar Current Sensing
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Solution Overview
Problem
Conventional Rogowski cable transducers are not well adapted for large busbar assemblies and multiphase systems, requiring complex installation and high production costs, and lack accurate positioning around busbar stacks.
Innovation Solution
A Rogowski cable current transducer arrangement with a Rogowski cable holder comprising a base wall, anchor pieces, and fixing straps made of elastomeric material, allowing easy installation and adjustment around busbar stacks, and supporting multiple Rogowski cables for multiphase systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional Rogowski cable transducers are used for large busbar assemblies, then the transducer can measure current, but the installation becomes complex and production costs increase
Solution Approach 1:
The Rogowski cable holder is divided into modular components: base walls, anchor pieces, and fixing straps. These segments can be independently assembled and adjusted to fit different busbar configurations, simplifying installation while maintaining measurement accuracy
Solution Approach 2:
The cable holder design with adjustable anchor pieces and fixing straps serves multiple functions: positioning the Rogowski cable, securing it to various busbar sizes, and accommodating different installation locations. This universal design reduces the need for custom installations and lowers production costs
2Measurement precision
If conventional Rogowski cable transducers are used for multiphase systems, then current measurement is possible, but the transducer is not well adapted for multiphase arrangements
Solution Approach 1:
The cable holder with multiple anchor pieces and fixing straps can be configured for single-phase or multiphase busbar arrangements. The modular design allows the same holder to adapt to different phase configurations and busbar geometries, enhancing versatility without compromising measurement precision
3Ease of operation
If standard holders are used for short Rogowski coils, then installation is simple, but they are not convenient for larger busbars and busbar assemblies
Solution Approach 1:
The fixing straps are designed to be flexible and adjustable, allowing the holder to dynamically adapt to different busbar sizes and shapes. This dynamic adjustment capability maintains ease of installation while accommodating large busbar assemblies that rigid standard holders cannot support
Data Source
Figure 1a~1b
Figure 1c~1e
Figure 2a~2b
AI summary
A Rogowski current transducer arrangement (2) for a busbar stack (1) comprising a one or more stacked busbar conductors, the busbar stack having opposed top and bottom major sides, each busbar extending between opposed minor side edges. The Rogowski current transducer arrangement comprises a Rogowski cable and a Rogowski cable holder (4) configured to support and hold the Rogowski cable (3) around the busbar stack. The Rogowski cable holder (4) comprises a Rogowski cable support (5) having a base wall (17) and a cable holder channel (6), the base wall (17) mountable along said outer side edges (18) of the busbars of the busbar stack (1). The Rogowski cable holder further comprises anchor pieces (7) mountable at corners of the busbar stack, and one or more fixing straps (8) having fasteners (10) for coupling to fasteners (20) on the anchor pieces, the base wall (17) of the Rogowski cable support (5) comprising fixing rails (9a) and the anchor piece (7) comprising complementary rails (9b) configured for coupling the Rogowski cable support to the anchor piece and fixing straps (8) for securing the Rogowski cable 3 around the busbar stack.