Dual-Power Transfer Switch Indicating Device Rigid Connection
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Solution Overview
Problem
Prior dual-power automatic transfer switch indicating devices often provide incorrect indications due to non-rigid connections between the indicating mechanism and contacts, leading to safety hazards when mechanical and electrical indicators fail to accurately represent the power supply states.
Innovation Solution
The indicating device comprises a mechanical and electrical indicating system with a moving indicating rod driven by first and second driving components, utilizing micro switches and a reset spring to ensure accurate representation of power supply states, preventing incorrect indications by maintaining a rigid connection with the moving contacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the indicating device uses a non-rigid connection with the mechanism drive, then the device complexity is reduced, but the reliability of indication is worsened due to incorrect indication when contacts are not rigidly connected
Solution Approach 1:
The patent creates a rigid mechanical copy of the contact position through the indicating rod that is directly connected to the moving contact. This mechanical copy (indicating rod) faithfully reproduces the contact position without relying on electrical signals or flexible connections, ensuring accurate indication while maintaining structural simplicity
Solution Approach 2:
The patent replaces electrical indication methods with a direct mechanical indication system. The indicating rod is rigidly connected to the moving contact and directly mechanically transmits the contact position to the indication window, eliminating the need for complex electrical sensors or flexible mechanical connections, thus improving reliability without increasing complexity
2Device complexity
If the indicating device provides only mechanical indication, then the device complexity is reduced, but the reliability is worsened because mechanical indicators alone cannot prevent incorrect indication
Solution Approach 1:
The patent merges mechanical indication (indicating rod with indication window) and electrical indication (micro switches) into a unified system. Both indication methods are driven by the same rigidly connected indicating rod, providing redundant verification of contact position. This combination enhances reliability without significantly increasing overall system complexity since both systems share the same mechanical drive
Solution Approach 2:
The patent implements feedback through the rigid mechanical connection between the moving contact and indicating rod. The indicating rod provides immediate mechanical feedback of the contact position to both the mechanical indication window and the electrical micro switches, ensuring that both indication systems reflect the actual contact state accurately and simultaneously
Data Source
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AI summary
An indicating device of a dual-power automatic transfer switch comprises a first driving component connected to a first moving contact of a first power supply and a second driving component connected to a second moving contact of a second power supply. The indicating device comprises a mechanical indicating device and an electrical indicating device; and an indicating part acting on the mechanical indicating device and the electrical indicating device. The first driving component and the second driving component respectively drive the indicating part to move; the movement of the indicating part drives the mechanical indicating device to move to a position indicating where the first power supply is switched on, a position indicating where the second power supply is switched on and a position where both the first power supply and the second power supply are switched off; the movement of the indicating part correspondingly actuates the electrical indicating device to indicate the switch on signal of the first power supply, the switch on signal of the second power supply and the switch off signal of the first power supply and the second power supply. A dual-power automatic transfer switch comprises the indicating device.