Integrated Current Detection in Compact Switch Disconnectors
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Solution Overview
Problem
Existing switch-disconnectors require additional measurement modules for current detection, increasing complexity and size, which is undesirable in applications where space and weight are limited.
Innovation Solution
Integration of a detection coil within the switch-disconnector housing, coupled with a communication module to detect current and provide output signals, eliminating the need for external measurement units and allowing for compact and robust design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If an additional measurement module is used for current detection, then current detection capability is improved, but device complexity and dimensions increase
Solution Approach 1:
The patent combines the current detection function with the existing switch-disconnector structure by integrating a detection coil around the movable contact. This merging eliminates the need for separate external measurement modules, thereby maintaining current detection capability while reducing device complexity and dimensions.
Solution Approach 2:
The movable contact in the switch-disconnector is given dual functionality: it serves both as the switching element and as the core around which the detection coil is wound for current measurement. This multi-functionality allows the same component to perform both switching and measurement tasks, reducing the need for additional dedicated measurement modules.
2Measurement precision
If an additional measurement module is used for current detection, then current detection capability is improved, but device size and weight increase
Solution Approach 1:
The detection coil is integrated around the movable contact within the existing switch-disconnector structure, merging the measurement function into the existing components. This eliminates the need for separate external measurement modules, thereby maintaining current detection capability while avoiding additional weight from separate measurement devices.
3Volume of stationary object
If a detection coil is integrated within the switch-disconnector, then device size is reduced, but detection reliability may be affected
Solution Approach 1:
The detection coil is wound around the movable contact, which is the actual current-carrying element. This direct integration ensures that the coil detects the true load current flowing through the switch contacts, providing reliable detection while maintaining a compact device structure without external modules.
Solution Approach 2:
The movable contact serves as an intermediary element that both carries the current to be measured and provides the structural support for the detection coil. This intermediary role ensures accurate current detection while maintaining mechanical integrity and compact design.
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 rapid and reliable detection of overcurrent conditions without additional modules, improving safety and reducing device size and weight, while facilitating easier retro-fitting and reduced material costs.
Implementation Method 1
a detection coil disposed around the first contact terminal or the second contact terminal of the switch, the detection coil configured to output a signal indicative of a current through the respective contact terminal
Data Source
Figure 1
Figure 2A~2B
Figure 3~4
AI summary
A switch disconnector with current detection is provided. The disconnector comprises a switch, the switch comprising: a first, fixed, contact terminal of a first conductor, a second, fixed, contact terminal of a second conductor, and a moveable bridge contact. An actuating mechanism of the disconnector is configured to open and close the switch by actuation of the moveable bridge contact, wherein the actuating mechanism is configured to move the bridge contact in a direction from a first position to a second position, wherein in the first position the switch is closed and the bridge contact is in electrical contact with the first and second contact terminals to define a current conduction path, and wherein in the second position the switch is open and the bridge contact is electrically separate from the first and second contact terminals. The disconnector comprises a detection coil disposed around the first contact terminal or the second contact terminal of the switch, the detection coil configured to output a signal indicative of a current through the respective contact terminal. The disconnector also comprises a communication module communicatively coupled to the detection coil and configured to receive the signal indicative of a current through the respective contact terminal and provide an output signal in dependence on the received signal.