Load Control Interlock Prevents Electrical Arcing
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Solution Overview
Problem
Existing power supply systems often experience electrical sparking or arcing when connecting or disconnecting loads, which can be hazardous, especially in combustible or explosive environments, and there is a need to reduce the occurrence of such events.
Innovation Solution
A load control interlock system that includes a first and second switching module to manage the coupling and uncoupling of input and output terminals based on detected keyed signals, ensuring safe and controlled power delivery by monitoring connections and using a conductive loop for adequate connection time before powering up.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If power is immediately delivered when a load is connected, then power delivery speed is improved, but electrical sparking or arcing occurs creating safety hazards
Solution Approach 1:
The system performs preliminary actions by first establishing a conductive loop connection before enabling power delivery. The interlock circuit detects the keyed signal and validates the connection path exists beforehand, then gradually enables power delivery through controlled switching modules. This preliminary connection validation prevents immediate power delivery that would cause sparking.
Solution Approach 2:
The switching modules dynamically control the power delivery state based on real-time detection of keyed signals and connection status. The system transitions from a static on/off state to a dynamic controlled state where power delivery is continuously adjusted based on connection validation, eliminating the harmful sparking effect while maintaining efficient power transfer.
2Speed
If switching modules rapidly couple terminals when a keyed signal is detected, then connection speed is improved, but electrical arcing occurs during connection
Solution Approach 1:
Before the switching modules couple the terminals, the system performs preliminary detection of the keyed signal to validate that the connection path is proper. This preliminary validation ensures that terminals are only coupled when the connection is verified, preventing arcing that would occur from improper or premature connection.
Solution Approach 2:
The interlock circuit serves as an intermediary between the keyed signal detection and the switching module activation. It mediates the connection process by validating the signal first, then controlling the switching modules to couple terminals in a controlled manner, preventing electrical arcing during the connection process.
3Productivity
If power delivery is immediately restored when a load is reconnected, then system availability is improved, but safety hazards persist in combustible environments
Solution Approach 1:
The system employs feedback by continuously monitoring the keyed signal and connection status through the interlock circuit. When a load is reconnected, the system detects the keyed signal, validates the connection through the feedback loop, and only then restores power delivery. This feedback mechanism ensures safety while maintaining system availability by preventing premature power restoration that would create hazards.
Data Source
AI summary
Load control interlocks are disclosed and described. The interlocks provide for coupling a power circuit to one or more load circuits once the one or more load circuits and the power circuit are both coupled to the interlock, and disconnects the power circuit from the one or more load circuits if the one or more load circuits or the power circuit are uncoupled form the interlock or an electrical connection between the power circuit and the one or more load circuits is broken.