Interlocking Socket with Pre-Energization Electrical Testing
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Solution Overview
Problem
Existing interlocking sockets for refrigerated shipping containers do not provide electrical testing features, leading to unsafe conditions due to potential damage in connectors and power cords, which can cause faults or arcing, especially in densely arranged storage setups closer to the power source.
Innovation Solution
An improved interlocking socket with a microcontroller that tests electrical connections, conductors, and loads before energizing, using detection circuits and indicators to communicate safe or unsafe conditions, and preventing power delivery if unsafe conditions are detected.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical interlocking features are used to ensure proper connector insertion, then connection reliability is improved, but electrical testing capability is lost
Solution Approach 1:
The patent combines mechanical interlocking features with electrical testing functionality into a single integrated receptacle system. The test circuits are integrated within the receptacle housing, allowing simultaneous mechanical connection verification and electrical safety testing without requiring separate devices.
Solution Approach 2:
The receptacle is designed to perform multiple functions: mechanical interlocking to ensure proper connector insertion, electrical continuity testing, ground fault detection, and overload protection. This multi-functional design eliminates the need for separate testing equipment while maintaining connection reliability.
2Productivity
If dense reefer rack arrangements are implemented to increase storage capacity, then productivity is improved, but the risk of unsafe electrical conditions increases
Solution Approach 1:
The receptacle performs preliminary electrical safety testing before allowing power delivery to connected equipment. The test circuits check for ground faults, continuity, and proper connection integrity before the main power circuit is energized, preventing unsafe conditions from developing in dense rack arrangements.
Solution Approach 2:
The system provides real-time feedback on electrical connection safety through indicator lights that show whether the connection is safe or unsafe. This immediate feedback allows operators to identify and correct potential hazards before they lead to arcing or faults in high-density storage environments.
3Reliability
If electrical testing circuits are added to the receptacle to detect unsafe conditions, then safety is improved, but device complexity increases
Solution Approach 1:
The electrical testing functionality is segmented into separate test circuits that can be independently configured and maintained. The receptacle includes distinct test windings and circuit paths that are electrically isolated from the main power delivery circuits, allowing modular implementation and simplifying troubleshooting.
Data Source
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AI summary
A system and method for testing of electrical connections, conductors, and loads prior to energizing those connections is disclosed. For example, an interlocking socket can comprise a receptacle designed to be coupled to a connector of a load. The interlocking socket can comprise a microprocessor coupled to the receptacle, the microcontroller operable for testing one or more faults in the connector, a conductor, or the load coupled to the connector. In another example, a microprocessor can be coupled to a switch comprising a conductor, where the microprocessor is operable for testing one or more faults in the conductor or a load coupled to the conductor.