Insulation-Piercing Switch Assembly for Live Conductor Isolation
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Solution Overview
Problem
Existing electrical switches require the removal of insulation and protective sheaths from current-carrying conductors to establish connections, necessitating power disconnection and complicating installation.
Innovation Solution
A switch arrangement that includes an isolating element, piercing contact elements, and a contact bridge, allowing for the separation and connection of conductor sections without stripping insulation, enabled by an actuating element that can be installed on live conductors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional electrical switches are installed by stripping insulation and connecting conductors to terminals, then reliable electrical connection is achieved, but installation complexity increases and power disconnection is required
Solution Approach 1:
The piercing contact elements are integrated within the switch housing, with the isolating element nested between conductor sections and the contact elements positioned to penetrate insulation and contact conductors. This nested arrangement allows all components to be contained within a single switch unit, enabling tool-free installation while maintaining reliable electrical connections.
Solution Approach 2:
The patent combines multiple functions into a single switch device: the isolating element separates conductor sections, the piercing contact elements establish electrical contact through insulation without stripping, and the contact bridge connects circuits. This merging of functions into one integrated unit simplifies installation while ensuring reliable connections.
2Productivity
If insulation is removed from conductors to establish connections, then electrical contact is established, but installation time increases and safety risks arise
Solution Approach 1:
The piercing contact elements serve as intermediaries that penetrate the insulation layer to contact the conductor without requiring removal of the insulation. The isolating element acts as a mediator that maintains separation between conductor sections while allowing controlled piercing contact. This approach enables rapid installation while eliminating safety risks associated with exposed conductors.
Solution Approach 2:
The switch device is pre-configured with piercing contact elements positioned to automatically contact conductors upon insertion, without requiring preliminary insulation removal. The isolating element is pre-positioned to separate conductor sections before connection, enabling immediate safe installation.
3Ease of operation
If conductors are disconnected and reconnected during installation, then proper circuit configuration is achieved, but installation time and complexity increase
Solution Approach 1:
The switch device performs self-installation functions: the isolating element automatically separates conductor sections upon insertion, the piercing contact elements automatically contact the conductors through insulation, and the contact bridge establishes circuit connections. This self-service mechanism eliminates the need for manual disconnection and reconnection steps, enabling tool-free installation in a single operation.
4Reliability
If multiple separate components are used for isolation and connection, then functional requirements are met, but device complexity increases
Solution Approach 1:
The patent merges the isolating element, piercing contact elements, and contact bridge into a single integrated switch device. The isolating element is positioned within the housing to separate conductor sections, while piercing contact elements are integrated into the same housing to establish electrical contact. The contact bridge is similarly integrated to connect circuits. This consolidation maintains reliable electrical isolation and connection while reducing the number of separate components to a single installable unit.
Data Source
Figure 1a~1e
Figure 2
Figure 3a~3b
AI summary
A switch assembly for connecting or disconnecting at least one current-carrying conductor is provided. The switch assembly comprises an electrical isolating element that electrically and mechanically separates a first conductor section and a second conductor section at a separation point. The switch assembly further comprises a first piercing contact element for contacting the first conductor section without stripping the insulation, a second piercing contact element for contacting the second conductor section without stripping the insulation, and a contact bridge for electrically connecting the first and second piercing contact elements across the separation point.The switch arrangement also comprises an actuating element for the switch arrangement, wherein an electrical contact of the contact bridge with the first and second penetration contact element is established or broken via the actuating element and thus a connection between the first conductor section and the second conductor section is established or broken.