Residual Current Protection Device External Actuation
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Solution Overview
Problem
Existing residual current protection devices require a residual or differential current to trip the circuit breaker, limiting manual or external actuation options and complicating functionality checks.
Innovation Solution
A residual current protection device with a connection device that allows independent actuation of the tripping device, enabling manual or external tripping without a residual current, through a switching device connected to the tripping device, which can be integrated or externally accessed via a 'floating-potential contact', allowing for modular and simplified construction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the tripping device is actuated only through residual current detection, then the residual current protection function is ensured, but manual or external actuation capability is limited
Solution Approach 1:
The tripping device is designed to accept multiple actuation methods: residual current detection, manual actuation through accessory pocket, and external actuation through connection device. This multi-functional design allows the same tripping mechanism to serve different purposes without requiring separate systems for each actuation method.
Solution Approach 2:
The connection device serves as an intermediary between external switching devices and the tripping device. It provides a standardized interface (with preset voltage) that allows external systems to actuate the tripping device without directly interfacing with the complex internal electromagnetic release mechanism, thereby simplifying external integration.
2Adaptability or versatility
If the residual current protection device and circuit breaker are in separate housings, then modular customization is enabled, but the integration and coordination between components becomes more complex
Solution Approach 1:
The system is divided into separate functional modules: the residual current protection device with its detection and tripping mechanisms, and the circuit breaker with its housing and accessory pockets. This segmentation allows each module to be independently designed, tested, and customized, while maintaining clear interface definitions for integration.
Solution Approach 2:
While maintaining physical separation of housings, the patent merges the functionality of the tripping device between the residual current protection device and the circuit breaker. The tripping device can be plugged into the circuit breaker's accessory pocket, creating a functional integration that combines the detection capabilities of the RCD with the switching capabilities of the circuit breaker.
3Ease of operation
If the tripping device is actuated externally without residual current, then manual tripping is enabled, but the residual current display may be incorrectly activated
Solution Approach 1:
The actuation signal path for manual/external tripping is extracted from the residual current detection path. The connection device provides a separate input channel that bypasses the detection device, allowing the tripping device to be actuated without triggering the residual current display or detection logic, thus preventing false information.
Solution Approach 2:
Instead of having the detection device control all tripping actions, the patent inverts the control logic by allowing the tripping device to be actuated independently of the detection device. The tripping device becomes the master controller that can respond to both detection signals and external commands, while the detection device only controls tripping when actual residual current is present.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables tripping of the circuit breaker independently of residual current detection, facilitating manual or remote operation and enhancing modularity and ease of functionality checks without affecting residual current display or detection systems.
Implementation Method 1
an electromagnetic release, with which systems a movement, in particular for a latching mechanism, can be generated from an actuation signal
Data Source
AI summary
A compact residual current protection device is connected to a circuit breaker or a load break switch for external tripping and includes a detection device for detecting a residual current and a tripping device which is actuable by the detection device for tripping the circuit breaker as a result of actuation by the tripping device. A connection device is connected to the tripping device for connecting a switching device. The detection device and the tripping device are constructed in such a way that the tripping device is able to be tripped through the connection device by the switching device independently of the detection device. An electrical protection configuration is also provided.