Rigid Cross Arm Covers for Utility Pole Electrical Isolation
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Solution Overview
Problem
The use of steel utility poles poses a safety risk for electrical workers due to the ground path created by metal poles near conductors, and existing rubber blankets are cumbersome, difficult to install, and can easily damage, providing a false sense of security.
Innovation Solution
A steel pole cross arm cover made of rigid non-conducting material, comprising a housing with intersecting vertical and horizontal channels, designed to fit around the utility pole and cross arm, with overlapping sections and locking pins to ensure electrical isolation and secure installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rubber blankets are used to cover and insulate the working area, then electrical isolation is provided, but the blankets are cumbersome to handle, difficult to install, and can easily damage
Solution Approach 1:
The safety cover is divided into multiple rigid panels that can be assembled together to form a complete protective enclosure. This segmentation allows the cover to be easier to handle and install compared to a single large rubber blanket, while maintaining electrical isolation through the insulating properties of each panel.
Solution Approach 2:
The rigid safety cover replaces the reusable rubber blanket with a more durable, structured alternative that resists damage. The cover is designed to be long-lasting and maintain its protective function over time, eliminating the need for frequent replacement due to damage.
2Reliability
If rubber blankets are used to cover and insulate the working area, then electrical isolation is provided, but the blankets can easily damage by the cross arm hardware
Solution Approach 1:
The cover consists of multiple rigid panels that can be assembled to form a protective enclosure. This segmented rigid structure resists damage from cross arm hardware better than flexible rubber blankets, while maintaining electrical isolation through the insulating properties of each panel.
Solution Approach 2:
The safety cover is made from rigid non-conducting material that combines structural strength with electrical insulation properties. This composite material approach provides both the mechanical strength to resist damage from hardware and the electrical isolation properties needed for worker safety.
Data Source
AI summary
Rigid non-conducting safety covers for the conductive components on an electrical utility pole are disclosed. The safety covers prevent arcing or current flowing to a user working on a utility pole. The safety covers extend over portions of the utility pole, cross arm and bracket mounting the cross arm to the utility pole.