Cable Connector Locking Mechanism for PV Systems
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Solution Overview
Problem
Cable connectors in photovoltaic systems face challenges in providing adequate protection against environmental factors and accidental contact, particularly in exposed outdoor conditions, and require enhanced security to prevent unintentional access to live parts.
Innovation Solution
A cable connector design featuring a housing with screwed cable glands, a contact device for connecting cables, and a locking mechanism that secures the cables to the housing, ensuring protection against environmental factors and accidental contact, with a locking device that prevents non-destructive opening by hand and allows tool-assisted release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a cable connector is designed with simple screwing of cable glands to the housing, then ease of operation is improved, but protection against accidental contact deteriorates
Solution Approach 1:
The locking device is designed to automatically engage and lock the cable gland to the housing immediately after screwing, preventing any subsequent opening by hand. This preliminary anti-action mechanism ensures that once the cable connector is assembled, it cannot be opened accidentally, thus providing reliable protection against accidental contact while maintaining simple installation procedures
2Reliability
If a locking device is added to prevent non-destructive opening by hand, then protection against accidental contact is improved, but device complexity increases
Solution Approach 1:
The locking device is merged with the cable gland and housing structures, where the locking elements are integrated into the existing components rather than being separate additions. The locking device comprises a locking element on the cable gland that engages with a corresponding recess in the housing, creating a unified structure that provides enhanced security without significantly increasing overall device complexity
Solution Approach 2:
The locking device is designed to be self-activating through the screwing motion itself. As the cable gland is screwed onto the housing, the locking element automatically engages with the locking recess, requiring no additional steps or separate locking mechanisms. This self-service approach provides reliable protection while minimizing added complexity
3Reliability
If cable glands are locked to the housing, then protection against environmental factors is improved, but ease of repair deteriorates
Solution Approach 1:
A tool-accessible feature is provided on the locking device that acts as an intermediary mechanism. This feature allows a tool (such as a screwdriver or Allen key) to engage with and disengage the locking elements, enabling controlled opening for repair purposes while maintaining secure locked operation during normal use. The intermediary tool interface provides a simple method to overcome the locking mechanism when repair is needed
Data Source
AI summary
A cable connector includes a housing, a first screwed cable gland for receiving a first cable, and a second screwed cable gland for receiving a second cable. The first cable can be connected to the second cable using a contact device. The cable connector also includes a locking device which, when screwing at least one screwed cable gland to the housing, locks said screwed cable gland to the housing so that the cables are mounted on the housing in a protected manner.