Protective Cover Arrangement for Electrical Units with Sealed Cable Entry
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Solution Overview
Problem
Existing protective cover arrangements for electrical units, such as compressor starters, are inadequate in preventing moisture and dust ingress due to large openings required for easy access and wiring, leading to potential electrical component failure, especially in outdoor applications.
Innovation Solution
A protective cover arrangement comprising an outer cover with mounting parts and an inner cover with curved cable entry structures that guide electrical cables and connectors, providing enhanced sealing without altering the design of existing components, allowing for easy retrofitting and improved protection against moisture and dust.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a detachable cover with large opening is used to allow easy access and wiring, then ease of operation is improved, but protection against moisture and dust deteriorates
Solution Approach 1:
The cover is divided into multiple segments: a fixed cover providing structural protection and sealing, and a detachable cover allowing access. This segmentation enables the fixed cover to maintain protection while the detachable cover provides access functionality when needed.
Solution Approach 2:
The cover transitions from a static design to a dynamic one where the detachable cover can be removed and reattached. This dynamic capability allows the system to switch between protected state (cover attached) and accessible state (cover removed), resolving the contradiction between continuous protection and ease of access.
2Ease of manufacture
If a detachable cover with large opening is used to allow wiring passage, then ease of manufacture is improved, but reliability deteriorates
Solution Approach 1:
The cover is divided into a fixed sealed portion and a detachable access portion. The fixed cover maintains reliable sealing for protection, while the detachable cover facilitates wiring installation during manufacturing and maintenance, resolving the contradiction between reliability and ease of manufacture.
Solution Approach 2:
Wiring is installed through the detachable cover during the manufacturing process before the cover is permanently attached. This preliminary action allows wiring access without compromising the final sealed state, ensuring both ease of manufacture and reliability.
3Ease of repair
If the detachable cover is made easy to remove for maintenance, then ease of repair is improved, but protection against unauthorized access deteriorates
Solution Approach 1:
The cover system is segmented into a permanent fixed cover and a removable detachable cover. The fixed cover provides continuous protection and deterrent against unauthorized access, while the detachable cover enables authorized maintenance personnel to access electrical components when needed.
Solution Approach 2:
The cover transitions from a static sealed state to a dynamic state where the detachable cover can be removed by authorized personnel for maintenance and then reattached to restore protection. This dynamic capability resolves the contradiction between ease of repair and protection against unauthorized access.
Data Source
AI summary
A protective cover arrangement (1) for a first electrical unit, e.g. a starter unit (3), mountable on a second electrical unit, e.g. a compressor (2). The protective cover arrangement (1) comprises an outer cover (5) and an inner cover (6). The outer cover (5) comprises mounting parts (8) adapted to cooperate with mounting parts (10) on the second electrical unit in order to mount the outer cover (5) on the second electrical unit. The inner cover (6) is sized and shaped to fit inside the outer cover (5), and it is adapted to accommodate a first electrical unit in an interior part (7). The inner cover (6) comprises an opening (12) allowing electrical connectors (4) to pass from the second electrical unit to the interior part (7), thereby providing electrical connection between the first electrical unit and the second electrical unit. The inner cover (6) further comprises a cable entry structure (9) allowing one or more electrical cables to pass from the exterior of the protective cover arrangement (1) to the interior part (7) of the inner cover (6), thereby providing power supply for the electrical units. The cable entry structure (9) defines one or more cable guides, each defining a curved cable path. The inner cover (6) provides additional protection against moisture and/or dust, and it can be added to the arrangement (1) without significantly changing the design of the other components. It is possible to retrofit the inner cover (6) onto operating devices.