Passive Disconnection Indicator for Electrical Protection Devices
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Solution Overview
Problem
Existing electrical installation protection devices face issues with energy consumption and mechanical complexity in indicating the connected or disconnected state of varistors, leading to potential wear and jamming risks.
Innovation Solution
An integrated disconnection indicator system within the protection device, where the indicator is formed as a single piece with the mounting portion and lacks relative movement, using a deformable connection element with a spring return and a temperature-melting retaining element to indicate the varistor's state visually without additional energy consumption or friction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If electrical indicators are used to indicate the connected or disconnected state of varistors, then the indication function is achieved, but permanent energy consumption occurs
Solution Approach 1:
The patent extracts the indication function from an active electrical indicator and transfers it to a passive mechanical indicator that moves with the connection element. The indicator simply reflects the physical state of connection without requiring energy input, thus eliminating permanent energy consumption while maintaining reliable indication.
Solution Approach 2:
The indicator system serves itself by being mechanically coupled to the connection element. As the connection element moves between connected and disconnected states, the indicator automatically follows this movement and displays the corresponding state without requiring external power or control mechanisms.
2Reliability
If mechanical indication systems are used to indicate the connected or disconnected state of varistors, then the indication function is achieved, but the system becomes costly and bulky with jamming risks
Solution Approach 1:
The patent merges the indication function with the existing connection element structure. The indicator is integrated into the connection element itself or directly coupled to it, so that the same mechanical movement that establishes or breaks the electrical connection also drives the indicator. This eliminates the need for separate mechanical indication mechanisms and reduces overall complexity.
Solution Approach 2:
The connection element serves dual functions: it performs the electrical connection/disconnection task and simultaneously drives the indication mechanism. This multi-functionality reduces the number of components needed and simplifies the overall system architecture while maintaining reliable indication.
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
The solution reduces bulk, minimizes wear and jamming risks, and eliminates energy consumption, providing a reliable and efficient visual indication of the varistor's state.
Implementation Method 1
the retaining element is capable of melting from a threshold temperature, the threshold temperature corresponds to an abnormal heating temperature of the varistor
Implementation Method 2
a return element allows the moveable part of the connection element to pass from the contact position to the open position; the return element is a spring
Data Source
Figure 1
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AI summary
The present invention relates to a protection device for an electrical installation comprising an electrically insulating body (3) defining an inner housing (5), the protection device (1) comprising, within the inner housing (5): an active component (5) of a protection device for an electrical installation; a disconnection system (11) for the active component (5) movable between a contact position corresponding to a connected state of the active component (5) and an open position corresponding to a disconnected state of the active component (5); a disconnection indicator (45).The disconnection indicator (45) is fixed in movement to the disconnection system (11) and in that the disconnection indicator (45) and the insulating body (3) are arranged to present a first configuration, which corresponds to the contact position, and a second configuration, which corresponds to the open position, the relative positioning of the disconnection indicator (45) with respect to the insulating body (3) in the first configuration being visually distinct from outside the insulating body (3) from the relative positioning of the disconnection indicator (45) with respect to the insulating body (3) in the second configuration.