Remote Leakage Protection Relay for Safe Power Disconnection
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Solution Overview
Problem
Existing leakage protection devices cannot be remotely monitored or controlled, posing safety risks when users are not near the household appliance, as they cannot safely and reliably manage power on/off or detect malfunctions.
Innovation Solution
A leakage protection device with a relay module independent of the switch module, combined with a signal processing and communication module, allowing remote control and monitoring through wireless communication with a remote control device, including features like state detection, parameter acquisition, and self-test modules.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a leakage protection device only implements basic leakage protection function, then the device complexity is low, but the device cannot be remotely controlled or monitored
Solution Approach 1:
The device is divided into functionally independent modules: a switch module for power control, a relay module for remote switching, a leakage detection module for safety monitoring, and a signal processing and communication module for remote communication. Each module performs a specific function, allowing the system to achieve remote control capability while maintaining clear functional separation and manageable complexity.
2Ease of operation
If the switch module is used for remote control, then remote power control is achieved, but reliable power disconnection cannot be ensured when leakage fault occurs
Solution Approach 1:
The relay module acts as an intermediary between the signal processing and communication module and the power circuit. It provides electrically isolated control of the power connection, ensuring that remote control signals can safely switch power without compromising the reliability of power disconnection during leakage faults. The relay's mechanical contact provides definitive on/off control independent of the electronic switch module.
3Ease of operation
If the device adds remote control functions, then user convenience is improved, but the risk of dangerous power connections during faults increases
Solution Approach 1:
The leakage detection module continuously monitors the circuit for leakage faults before they can cause harm. When a fault is detected, the system preemptively prevents dangerous power connections by blocking remote control operations and ensuring power disconnection through the relay module. This preliminary detection and prevention mechanism eliminates safety hazards before they can affect the user.
Solution Approach 2:
The signal processing and communication module provides real-time feedback about the device's operational state and leakage detection status to the user. This feedback mechanism allows users to know whether the device is safe to control remotely or if power disconnection has been triggered due to a fault, enabling informed operation and preventing unsafe control actions.
Data Source
AI summary
A leakage protection device includes: a switch module controlling the power connection between multiple input terminals and multiple output terminals; a leakage detection module, generating a leakage fault signal when a leakage current signal is detected or exceeds a preset threshold; a drive module, driving the switch module to disconnect the power connection between the input and output terminals in response to the leakage fault signal; a relay module, including a switch, coupled between at least one input terminal and the corresponding output terminal; a signal processing and communication module, communicating with a remote control device and controlling the relay module to open or close the switch in response to a control command from the remote control device, thereby disconnecting or connecting the power connection when the switch module is closed. The leakage protection device allows remote control of the leakage protection device safely and reliably.