Switching Apparatus Latching Power Interlock
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Solution Overview
Problem
Existing electric switching apparatuses lack reliable error prevention mechanisms for ensuring correct installation and secure attachment of add-on units, which can lead to incorrect operation due to human errors during installation or vibrations.
Innovation Solution
The electric switching apparatus incorporates electric power supply means that are operational only when the latching means are in the first operating position, ensuring that the electromagnetic actuator's power supply is dependent on correct latching, thereby preventing incorrect installation and ensuring secure attachment of add-on units.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical latching means are used to fix the add-on unit on the switching unit, then the add-on unit can be securely attached, but the system cannot prevent incorrect installation or detect when the add-on unit becomes detached
Solution Approach 1:
The patent implements feedback by using electric switching means that automatically detect the position of the latching means and control power supply accordingly. When the latching means moves to the first operating position (indicating correct attachment), the electric switching means closes the circuit and enables power supply. When detached or incorrectly installed, the circuit remains open and power supply is prevented, providing automatic verification without additional complexity.
Solution Approach 2:
The system performs self-verification through the integration of the latching means position directly controlling the electric switching means. The mechanical position of the latching means automatically operates the electric switching means, which in turn controls the power supply to the electromagnetic actuator, eliminating the need for separate verification mechanisms.
2Ease of operation
If electric power supply means are always operational, then the electromagnetic actuator can be supplied with power, but incorrect installation or detachment cannot be prevented
Solution Approach 1:
The patent applies preliminary anti-action by preventing power supply to the electromagnetic actuator before correct installation is verified. The electric switching means remains in the open position (preventing power flow) until the latching means is confirmed to be in the first operating position, thereby preemptively blocking incorrect operation before it can occur.
Solution Approach 2:
The system performs preliminary verification by requiring the latching means to be in the correct position before enabling power supply. The electric switching means closes the circuit only after the mechanical latching has been properly engaged, ensuring that power is supplied only when the add-on unit is correctly installed and secured.
3Reliability
If the electric switching means are integrated into the detachable add-on unit, then correct installation is verified, but the switching means may be affected by vibrations or shocks during operation
Solution Approach 1:
The patent merges the electric switching means with the mechanical latching means into an integrated assembly. The switching means is positioned such that the mechanical movement of the latching means directly actuates the switching contacts, combining the verification function with the power control function in a single robust mechanism that resists vibrations and shocks.
4Device complexity
If mechanical latching means are used without electric verification, then the device structure remains simple, but the system cannot ensure correct operation over time
Solution Approach 1:
The patent implements feedback by using the position of the latching means to automatically control the electric switching means, which in turn controls power supply to the electromagnetic actuator. This creates a closed-loop verification system where the mechanical state is continuously reflected in the electrical state, ensuring correct operation without adding significant structural complexity.
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
This solution ensures dependable operation by preventing power supply to the actuating coil unless the latching means are correctly positioned, thereby reducing the risk of incorrect installation and ensuring secure attachment of add-on units, enhancing the reliability of the electric switching apparatus.
Implementation Method 1
An electro-magnetic actuator commands opening and/or closing of the electric contacts
Data Source
AI summary
The invention relates to an electric switching apparatus (1) comprising:a switching unit (10) having:an electromagnetic actuator (12) to command opening and/or closing of electric contacts (11),mechanical latching means (15) designed for connection of a detachable add-on unit (20), said latching means, in a first operating position, enabling fixing of said add-on unit on said switching unit,The switching apparatus comprises electric power supply means designed to supply power to the electromagnetic actuator (12) and being arranged to operate in a manner that is dependent on the position of the latching means (15). The electric power supply means are inoperational when the latching means are not in the first operating position, the actuating coil (17) of the electromagnetic actuator (12) not being able to be supplied.