PCB Terminal Block with Segmented Conductors for Lightning Protection
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Solution Overview
Problem
In split Radio Base Station architectures, existing surge protection systems struggle to effectively protect sensitive equipment from direct lightning strikes, as they are not designed to withstand repeated direct lightning currents, posing a risk to both tower-mounted and shelter-based equipment.
Innovation Solution
A printed circuit board (PCB) assembly with a terminal block configuration that includes an electrically insulating base and conductive conductor members, which securely engage cable lugs through lug holes to provide a Kelvin connection and secure the cables, incorporating anti-rotation features and a surge protection device module to protect against lightning-induced damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional surge protection systems are used, then basic surge protection is provided, but they cannot withstand repeated direct lightning currents
Solution Approach 1:
The terminal block is divided into separate conductor members (first conductor member and second conductor member) that are electrically isolated from each other by the insulating base. This segmentation allows each conductor member to independently handle lightning currents, preventing current paths between adjacent conductors and enabling the system to withstand repeated direct lightning strikes without cumulative damage.
Solution Approach 2:
The insulating base acts as an intermediary between adjacent conductor members, physically separating them and preventing electrical contact. This intermediary structure ensures that lightning currents cannot jump between conductors, providing reliable protection against direct lightning strikes while maintaining the functional integrity of the terminal block.
2Reliability
If cable lugs are securely clamped to conductor members, then reliable electrical connection is achieved, but the terminal block must withstand high mechanical stresses
Solution Approach 1:
The insulating base is pre-formed with recesses that are specifically shaped to receive and accommodate cable lugs. This preliminary structuring of the base creates built-in mechanical support that distributes clamping forces across the base structure, allowing secure electrical connections to be made while the base absorbs and distributes the mechanical stresses generated during cable termination.
3Ease of operation
If multiple conductor members are placed adjacent to each other, then cable management is improved, but electrical isolation between conductors becomes critical
Solution Approach 1:
Multiple conductor members are merged into a single integrated terminal block structure with a common insulating base. This combination allows adjacent conductors to be closely positioned for efficient cable management while the unified insulating base provides continuous electrical isolation between all conductor members, preventing harmful electrical interference and maintaining signal integrity.
Data Source
AI summary
A printed circuit board (PCB) assembly for use with first and second cables terminated with first and second cable lugs, respectively, wherein each of the first and second cable lugs includes two lug holes defined therein, the includes a PCB and a terminal block. The terminal block includes an electrically insulating base mounted on the PCB, and at least one electrically conductive conductor member mounted on the base and electrically connected to the PCB. The at least one conductor member is configured to engage each of the first and second cable lugs through the four lug holes thereof to electrically in-line terminate the first and second cables at the terminal block.