Enclosed Electromagnetic Switch Status Indication via Auxiliary Contacts
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Solution Overview
Problem
Conventional enclosed-type electromagnetic switches lack a status indication function, making it difficult for users to determine the operational state of the electromagnetic contactor without opening the enclosure, which is inconvenient and prone to exposure to environmental factors.
Innovation Solution
Incorporating first and second indicating means connected to NO and NC auxiliary contacts, respectively, which are exposed through the enclosure, allowing visual or acoustic indication of the contactor's on or off state without opening the enclosure, using light emitting or acoustic means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the electromagnetic contactor is embedded inside the enclosure, then the switch is protected from environmental factors, but the user cannot check the operational status without opening the enclosure
Solution Approach 1:
The patent introduces auxiliary contacts and indicating means as intermediary elements that transmit status information from the enclosed electromagnetic contactor to the external user interface. The auxiliary contacts detect the contactor's operational state internally, while the indicating means (such as LEDs or display elements) externally display this status, serving as a mediator between the enclosed component and the user.
Solution Approach 2:
The patent replaces the mechanical action of opening the enclosure to check status with an optical or electrical indication system. Instead of physically accessing the internal components, users can visually observe the status through indicating means that convert the mechanical/electrical state of the contactor into visible signals.
2Loss of information
If the enclosure is opened to check the electromagnetic contactor status, then the user can see the operational state, but the enclosure and internal components are exposed to environmental factors
Solution Approach 1:
The indicating means serve as an intermediary that conveys status information without requiring physical access to the enclosed space. This allows users to obtain complete status information while the enclosure remains closed, preventing exposure to environmental contaminants.
Solution Approach 2:
The patent substitutes the mechanical operation of opening the enclosure with an optical/electrical information transmission system. Status information is transmitted through the enclosure walls via indicating means, eliminating the need to physically open the enclosure and thereby preventing exposure to harmful environmental factors.
3Ease of operation
If indicating means are added to show contactor status, then users can identify operational state externally, but the device complexity increases
Solution Approach 1:
The auxiliary contacts serve multiple functions: they detect the operational status of the electromagnetic contactor and simultaneously provide the control signal for the indicating means. This multi-functionality reduces the need for separate dedicated components, thereby limiting the increase in overall device complexity while achieving external status indication.
Solution Approach 2:
The patent merges the status detection function and status indication function into an integrated system. The auxiliary contacts and indicating means are combined to work together as a unified status display mechanism, reducing the number of separate components needed compared to having independent detection and indication systems.
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 users to easily identify the status of the electromagnetic contactor without opening the enclosure, enhancing usability and maintaining the switch's integrity in harsh environments.
Implementation Method 1
the electromagnetic contactor or direct current relay is a type of electrical circuit switching unit that transfers mechanical motion and current signals by using the principle of an electromagnet
Implementation Method 2
the thermal overload relay is a subsidiary device that break a circuit using the thermal expansion characteristics of bimetallic strips embedded in a heater
Data Source
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AI summary
The present invention relates to an enclosed type electromagnetic switch having a status indication function, and more particularly, to and enclosed-type electromagnetic switch having a status indication function that can show the electromagnetic switch's status on an enclosure. An enclosed type electromagnetic switch having a status indication function according to an exemplary embodiment of the present invention comprises: an enclosure (10); an electromagnetic contactor installed inside the enclosure; an auxiliary contact unit attached to one side of the electromagnetic contactor; an overload relay installed inside the enclosure and providing a trip signal to the electromagnetic contactor. The enclosure comprises: a first indicating means (40) that shows that the electromagnetic contactor is in the on state; and a second indicating means (45) that shows that the electromagnetic contactor is in the off state, wherein the first indicating means (40) is connected to contacts a (NO contacts) of the auxiliary contact unit, and the second indicating means (45) is connected to contacts b (NC contacts) of the auxiliary contact unit.